Post by: rbm on November 20, 2012, 11:35:29 AM
Gear Indicator and Start Enable Board
The TGPI design has gone through a few iterations, with the current version 4.1 being based on a micro-sized Arduino processor. This design is adaptable because of the on-board computer and can display the gear in a multiple of ways:
- With a numeric digit using a 7-segment 0.39" LED display
- With up to 6 LEDs, each LED representing a selected gear
- With a direct connection to an aftermarket Koso gauge which has inputs for displaying a selected gear
- With up to 6 incandescent bulbs, similar to the LEDs, but for a retro look when placed behind a bezel
The Gear Indicator and Start Enable Board also has circuitry to amplify and condition the speed signal coming off the rear drive. Many modern aftermarket speedometers require the use of an active inductive sensor that outputs large voltage levels (>7 volts) for the meter to work properly. This usually means adding a magnet and aftermarket sensor to the front wheel to get that signal. The variable reluctance (VR) sensor in the final drive of the K100 is not capable of reproducing these active signals without help. The circuit on this board will amplify the weak VR signal from the K100 sensor, making it usable for a range of aftermarket speedometers. This means one can re-purpose the OEM sensor and avoid adding additional sensors to the bike.. This feature means that you don't have to use the manufacturer's speed sensor and worry about finding a place to mount it.
I have developed the next version of the TGPI board (v5.2). This version includes new functionality and a fundamental change in the design. There is a circuit now that will condition the engine RPM signal available on the Black/Blue wire (Pin 16) of the OEM cluster, and make the signal compatible with aftermarket tachometers. I have also included a more robust power supply onboard along with a resettable fuse and transient voltage protection. This will result in a more robust reliable board than previous designs. Finally I have integrated a circuit on the tachometer output that adjusts the signal to make it compatible with one particularly popular Chinese aftermarket gauge.
(http://i65.tinypic.com/2qsz3vb.jpg)
The overall size of the board is 4cm X 6cm.
The change in design with v5 means that I manufacture the board based on the type of display you desire. There are two versions of the build and unfortunately, they are not interchangeable between themselves. That means we collaborate during the ordering process to make sure I supply you with the correct version of the board.
The tested board and LED display is targeted at $75.00 CDN plus shipping.
TGPI User's Manual Online (https://drive.google.com/open?id=0B3UPbNZRyr1rQ04xbGJqSlRmZk0)
Speed and Tachometer Conditioning Circuitry:
If all you're interested in is just the speedometer amplifier circuitry or just the tachometer conditioning circuitry or both, it is possible for me to build only that function on the board and largely ignore the rest of the components. The cost is significantly reduced, down to $27.00 CDN plus postage, for that board.
(http://i67.tinypic.com/znlvet.png)
3 Circuit Switched Fuseblock
(https://lh4.googleusercontent.com/-grfBBfqlx0o/VAj4-coqlRI/AAAAAAAAD84/2lwmlcXs3jU/s800/20130424-acc-fuse-003.jpg)
This board provides three switched 12 volt fused circuits in a compact 5cm X 5cm package for powering accessories that you add to your bike. The switching relay is provided on the card, which simplifies the installation. These circuits can handle up to 30A current total (the limit on the switching relay's contacts) and has a LED for power indication. The tested board is $21.00 CDN plus shipping.
The prices are very close to my costs just for the parts that are used. I'm making no money on these, but making them available to support the community of K-bike owners.
4-Relay Neutral Detect:
I have designed a printed circuit board to simplify the construction of the popular neutral detect circuit using four relays. The board using through hole components which should be easy to source locally in a number of markets. I was thinking of supplying this design in a flexible way, to meet different budgets and skill levels.
- A completely assembled and tested circuit (first photo)
- A kit consisting of the PCB and all parts ready to be assembled (second photo)
- The raw PCB
(https://lh3.googleusercontent.com/wgnpLbwhSaPxCu24gWGouaFUlFRmKUSlLeEfXD4pwzT6pDpke4wFkjkCOoX-ohAek9OEzzwkL8GgtqL05-vzLQNLi5swmdG0mN2o1hL-0O8wGV5RZH2Yv4k_j17izFtnmWfG_tpbFhWAidEE6GA-NWajgGfrtxJNKkLH27RFnqRluo24YslTvFd8CAzX3zrxH6KsLTsowldGw_uCJ4xRySqDM0Ksg4Sham3jWTqrnhCE2ELBmJjgTnrkKO6NY3dxwATT0FTOoqSqSqkTif_wjF550LkfdMBhO5MKTs5uWRPGoG3YoxUH53dcQmCJK7iOGI27YmiueA-exUqfCS2reNaO3rzT7DvwEh1i9WdmHsHJJ06x74UBpp7MBKcl3opvpCcqWtOaqE5UIgykuvbm98QEJYGaABNYQ_-9JgLcTYIHnBbUi6UpBAAs-_pvlNKVpJL856lavcAa5dZQ8y6aPk3yn3mWhQuZJwDJNRF20UiQ39UB3OC2DX9nKpOnddCtmGxuxW4nCXFanX_0TGYnkikzOXC6SsYKi6YihdU83ks_QVEBcWlRH47OPJ4XzOg6SYLkUFlVRLzTRXV26IqaZS6YiyKIn48_1frGRAn3DAMu7poz87Qiqs6z=w1208-h1398-no)
(https://lh3.googleusercontent.com/BdyX2J0S_7JWB1De7shFlMei-t85Gi1nKVsAbI4geGjOarS9pKyq4RuMH1pjvNr6HRjMsGo5eMDcPyzB_zkf5lWB1VvdzK4E7k9w2lJFDJoyHm5g7eZUeK5hm8OCx9ChWxbME-ny_tr_DgFdvHJ1WUZEp0XB_DXyfECBLuLse447mp9y3yUngSMTSL0c8Gxe2smuQ7m_TDgPAoU2bJ_kcOEO-UutUjbTc-49bl_cdISmji6FAujTBXKsGkKr1rZ2iPWn5rRHRBONA3bsk8mLTS_04iplJmikDRq-6cS2gj_5bH_pt2AU5oZljBtsBRjl-0bTrpk58NdyXsT914eRvMCoBmNPFGzv7cHCiSZihzgU9k8n7V18kWEGnxBHU06SnM1AvfVww9bMC69U13gMu0_XpqiDEb7aQO9ypWsbSFdFUejiI3p3jDmQL-9nYA5T1dy96PY5qxf6FP5DlqRc2MFvYuPqevqW7JPvEGL-G9mBydRxPouiKnfwKf55d5Ce7BqrQNb4FZvC-NxVeyIGcQUdim7jDUHpk2_yXZzSo8ubvBLZKXDksAJC4ajMCiZxVxLeG9mPP7z_5lB2FRUxZzAf23J09NwtBrWJibCItO17TC6Q1XbgTIA8=w1920-h1398-no)
Post by: frankenduck on November 20, 2012, 12:02:43 PM
How about a keyless gas cap? :lol:
Post by: frankenduck on November 20, 2012, 12:04:34 PM
Post by: rbm on November 20, 2012, 12:10:42 PM
Post by: wmax351 on November 20, 2012, 12:52:25 PM
Post by: rbm on November 20, 2012, 07:19:18 PM
No, I hadn't based it on the LM1815. I am investigating the MAX 9924 instrumentation amp. I'll also look at the LM1815 to see if implementation is easier with that module. My motivation for this circuit is to get the OEM VR transducer to function with a Motogadgets speedometer on my K75.
Post by: wmax351 on November 21, 2012, 12:19:15 AM
Hi Max,
No, I hadn't based it on the LM1815. I am investigating the MAX 9924 instrumentation amp. I'll also look at the LM1815 to see if implementation is easier with that module. My motivation for this circuit is to get the OEM VR transducer to function with a Motogadgets speedometer on my K75.
Either should work well. The LM1815 is a purpose built chip for VR sensors, with zero crossing and other modes. Overkill in some cases, but works great in others.
Post by: Uffda on November 21, 2012, 07:26:16 PM
Post by: wmax351 on November 21, 2012, 07:34:46 PM
Just when I think I have a rudimentary knowledge of motorcycle maintenance (this is my first bike and I am learning as I go on the DIY maintenance via this forum), I run across this thread and wonder if I am even in the same hemisphere with my understanding. I will keep watching but I don't think I will ever catch up with the knowledge/experience level I see here.
Take a look at the trip computer thread, and the Megasquirt thread. Its my engineering fix (I'm pre-med [my real passion], and couldn't take engineering at Berkeley because of it).
The great thing is everyone here is happy to share and teach.
Post by: Duc750 on November 22, 2012, 05:58:08 AM
Post by: plamenk on May 31, 2013, 04:06:36 PM
I am trying to replace the OEM speedo of my K75S1 with Daytona Velona speedometer using original speed sensor. Do you have any success with OEM speedometer sensor signal converter - amplifier? There is a speed sensor selling separately for Velona but I want to use the original one.
Thank you in advance!
Post by: wmax351 on June 01, 2013, 08:14:40 PM
Hello all!
I am trying to replace the OEM speedo of my K75S1 with Daytona Velona speedometer using original speed sensor. Do you have any success with OEM speedometer sensor signal converter - amplifier? There is a speed sensor selling separately for Velona but I want to use the original one.
Thank you in advance!
You could remove the amplifier/conditioner from the cluster (it is located on a daughterboard, and outputs 6 5-volt pulses per wheel revolution.
The raw output of the sensor is an a/c voltage from a vr sensor. It may or may not be compatible with the velona.
Post by: plamenk on June 03, 2013, 01:48:48 PM
Post by: plamenk on June 05, 2013, 05:34:53 PM
(http://img16.imageshack.us/img16/9936/digitalaftermarketspeed.jpg) (http://imageshack.us/photo/my-images/16/digitalaftermarketspeed.jpg/)
Uploaded with ImageShack.us (http://imageshack.us)
Post by: rbm on June 05, 2013, 05:53:21 PM
Can I ask what you observed as the frequency and duty cycle for the output, per wheel rotation?
Post by: plamenk on June 06, 2013, 01:24:26 PM
I tried to use a simple amplifier but there are too many noises from magnetic coil speed sensor so the speedometer going crazy. At constant speed 40 km/h it jumps from 40 to 200 and more. And I decided to build a Schmidt trigger circuit. With success.
Excuse my bad English. I hope you can understand my post.
Post by: johnny on June 06, 2013, 01:45:58 PM
j o
Post by: rbm on June 06, 2013, 07:37:06 PM
This is good information for me. I'm attaching a Motogadgets speedo to my K75 and prefer to use the built-in sensor rather than the supplied sensor. This circuit will work for my installation as well.
Post by: plamenk on June 07, 2013, 01:27:21 PM
Post by: rbm on June 07, 2013, 03:23:34 PM
Yes that is true. And you can use any LM78XX. It depends of out voltage the speedo needs.But then the voltage divider resistor values have to change appropriately.
Post by: Totem95d on December 13, 2015, 02:58:39 PM
Thanks :)
(The preview of the plamenk electronic diagram doesn't work but the link yes :
http://imagizer.imageshack.com/img16/9936/digitalaftermarketspeed.jpg)
Post by: BRIDGE on December 22, 2015, 07:21:25 AM
I'm attaching a Motogadgets speedo to my K75 and prefer to use the built-in sensor rather than the supplied sensor. This circuit will work for my installation as well.
Do you know if its possible to use the motogadget sensor in place of the built in sensor? I foolishly sold mine as I thought if I was buying a new speedo that I would just replace the whole shebang, when I now know I could have just adapted the original.
If so do you know which of the sensors would be best? And sorry for hijacking http://motogadget.com/en/accessories/sensors.html (http://motogadget.com/en/accessories/sensors.html)
Post by: rbm on December 22, 2015, 11:04:14 AM
Post by: BRIDGE on December 22, 2015, 01:03:55 PM
I sold the sensor a few months ago, and currently I have sealed the hole with plastic and electrical tape to stop anything getting into the hole. Though this is because the bike currently is sitting in the garage as it slowly gets built (also I'm waiting for my full licence so can't ride it).
I'm going to look for a possible stopper or grommet to plug it, but failing that I know a 3d printing company that can print with rubber so will design and have some made.
Post by: Totem95d on December 28, 2015, 05:34:49 AM
The Original one is much more well integrated ...
But I'm asking myself about the input voltage in the motogadget speedometer, 5v (has written on the diagram) is OK ??
Thanks
Post by: rbm on December 28, 2015, 10:51:43 AM
Post by: Totem95d on December 28, 2015, 01:07:23 PM
It was the information I was missing, the motogadget sensor is not only a magnet, and need voltage to works . thank you.
Post by: rbm on December 28, 2015, 01:10:18 PM
Post by: Totem95d on January 09, 2016, 01:44:25 PM
Thanks for the previous answers !
I made the circuit today, but I would like to check something before to test it...
Is there 3 connections on the board OR Is there 4 connections ? :
1: IN +12V
2: IN +BMW Sensor
3: OUT to speedmeter
OR
1: IN +12V
2: IN +BMW Sensor
3: OUT to speedmeter
4: Ground
Thanks
Post by: rbm on January 09, 2016, 06:19:12 PM
Post by: Totem95d on January 10, 2016, 10:21:19 AM
Post by: Totem95d on January 13, 2016, 06:24:16 AM
First I wanted to buy a Motogadget speedo...but it was finnally too expensive for me...I found something similar but I'm not sure this model could works with the electronic circuit :
http://kosonorthamerica.com/product/tnt-01/
I think it's incompatible because it works with a passive speed sensor, do you agree ?
Post by: rbm on January 13, 2016, 06:50:14 PM
Post by: Bill on January 13, 2016, 08:40:48 PM
Post by: rbm on January 13, 2016, 08:47:56 PM
Post by: K1300S on January 13, 2016, 09:38:52 PM
Post by: Bill on January 13, 2016, 10:00:17 PM
Post by: koon on March 01, 2016, 12:59:45 PM
I am in the progress of installing a KOSO GP style speedo and I would very much like to use the built in speed sensor on my 1991 K75.
(http://siddepuden.dk/Skarpnes/Projekt/koso.jpg)
The speedo came with a passive speed sensor which can read up to 6 pulsations.
It has an optional active speed sensor which can read up to 20 pulsations.
From reading this subject I understand that it should be possible to use the original bmw speed sensor if I built a board.
Can somebody help me with a diagram of what I should built in order for this to work?
Any help will be much appreciated :bmwsmile
Thomas
Post by: timewolf on July 01, 2016, 10:07:25 PM
Ive been following and reading a ton on motobrick and soaking as much info as i can
this is my first post/reply/ question ... I've done my research and read as much as i can.
there has been discussion of what happens when removing the gauge cluster... which I've been riding around with out for a two weeks (waiting for me new after market) gauges to arrive. it didn't dawn on me that the alternator would stop working due to no bulb in the circuit. i haven't died yet but who knows when that will happen.
I love my Brick ( its my first despite owning and building 17 motorcycles from scratch) i really don't love the gauges as they and bulky.
Is there a quick or slow fix to work around this.
Thanks in advance for the time and help
-Wolf
1987 BMW K100RS
Post by: Laitch on July 01, 2016, 11:16:29 PM
i haven't died yet but who knows when that will happen.Welcome, timewolf.
If it's any comfort, you aren't alone. None of us really know when that will happen.
Post by: K1300S on August 14, 2016, 10:57:24 AM
HI guys,
.
there has been discussion of what happens when removing the gauge cluster... which I've been riding around with out for a two weeks (waiting for me new after market) gauges to arrive. it didn't dawn on me that the alternator would stop working due to no bulb in the circuit.
i really don't love the gauges as they and bulky.
Is there a quick or slow fix to work around this.
-Wolf
1987 BMW K100RS
is that a trick question? ;-)
put the stock gauges back in until you figure out the alternate replacement......
Post by: DJC on August 14, 2016, 05:36:00 PM
But, if you can't....
From what i understand, the charging circuit runs through the light on the original dash. Which is a 3W globe.
So to emulate that circuit, you'll need something like a 120 Ohm / 3 Watt resistor. This gets wired between the BLUE cable from the alternator and any switched POSITIVE.
I'm in the process of doing this to my bike so i'll keep it updated with results.
Post by: XxRamboSpainxX on August 17, 2016, 10:44:43 AM
If you can put the stock gauge in while you wait. Do that.
But, if you can't....
From what i understand, the charging circuit runs through the light on the original dash. Which is a 3W globe.
So to emulate that circuit, you'll need something like a 120 Ohm / 3 Watt resistor. This gets wired between the BLUE cable from the alternator and any switched POSITIVE.
I'm in the process of doing this to my bike so i'll keep it updated with results.
i'm in the process of doing this too
Post by: duckytran on August 31, 2016, 09:58:49 AM
Hi guys.
I am in the progress of installing a KOSO GP style speedo and I would very much like to use the built in speed sensor on my 1991 K75.
(http://siddepuden.dk/Skarpnes/Projekt/koso.jpg)
The speedo came with a passive speed sensor which can read up to 6 pulsations.
It has an optional active speed sensor which can read up to 20 pulsations.
From reading this subject I understand that it should be possible to use the original bmw speed sensor if I built a board.
Can somebody help me with a diagram of what I should built in order for this to work?
Any help will be much appreciated :bmwsmile
Thomas
I saw this suggestion from another thread. Check it out and see if can help you.
http://maru-labs.com/en/
Post by: jc55 on October 15, 2016, 11:52:47 AM
Also, do you have any opinions on the...
MSD Tach Signal GMR Pickup
Converts a low-voltage, high-current pulse to a clean 12-volt square wave with no wire splicing required.
PART# 8918
Suggested Retail: $65.68
Your Price:$59.11
Post by: rbm on October 15, 2016, 05:21:06 PM
RBM, I'm thinking about using one of the various Trail Tech units. Are there any issues using one of these relays for the "start in neutral emulation" circuit? They're plentiful and would be a compact option with or without the base.
This is a power switching relay and is oversized for the application. The contacts are rated at 120V/5A which is 600 Watts or about 0.8 HP. The Start in Neutral relays only have to have contacts rated at 12V/1A max. In any case, it is also a 4PDT. You'd have to have four of them to get the functionality meaning they collectively would take a huge amount of space in the relay box (if that's where you'd locate them). I think these are a poor choice for the application, even if they are plentiful.
Also, do you have any opinions on the...This looks like a good solution to getting a conditioned signal to the tachometer input on your gauge and it appears to work with a number of different ignition systems. I think the price is fair for what they are providing. It probably has some quantity of electronic components inside it to perform the signal conditioning. Others have managed to condition the signal coming off the coil primary, and I have helped a guy with his K75 to get the tach working by wrapping 6 turns of 18AWG wire around Cylinder #1 spark wire. The MSD pickup tooks to be a very universal solution.
MSD Tach Signal GMR Pickup
Converts a low-voltage, high-current pulse to a clean 12-volt square wave with no wire splicing required.
PART# 8918
Suggested Retail: $65.68
Your Price:$59.11
Post by: jc55 on October 16, 2016, 08:28:11 AM
I'm assuming there is a triple ground redundancy to ensure that there isn't an accidental starting while in gear.
Thank you for weighing in on the MSD GMR pickup. It appears to require an rpm pulse per revolution setting of "1". The Trail Techs seem to provide a .5, 1 and 2 PPR.
RBM, do you have any of your 'start in neutral' circuits available to buy?
Post by: rbm on October 16, 2016, 08:36:08 AM
The TGPI switch is a three pole rotary switch that has contacts arranged in a circular pattern. The wiper arm inside the switch rotates via an axle protruding out of the transmission. As each gear is selected, the axle rotates a few degrees, and positions the wiper over a patterned set of three contacts. The pattern reproduced by the contact arrangement mimics a Binary Coded Decimal (BCD) truth table. BCD is a very common method in computers to digitally represent a number between 0 - 7. For the K-bike transmission, there are 6 gear positions - Neutral and 1 - 5. The circuit inside the OEM cluster translates that pattern into gear numbers and neutral. Neutral is equal to Gear 0. The circuit detects this state and does special things when it is detected., exactly the same way the relays do, my circuit does and Maru's Brotbox does.
Post by: jc55 on October 16, 2016, 08:46:02 AM
Post by: sermardau on November 14, 2016, 01:04:28 PM
I am trying to replace the OEM speedo of my K75 with a Daytona Velona speedometer using original speed sensor, and also I have some led lights in order to replace the functions of the original velocimeter. Do you know how I can make it work? I'm rather new with electronics, so any help with the scheme of the circuit will be highly appreciated!
Thank you in advance!
:riding:
Post by: rbm on February 27, 2017, 07:51:38 AM
Below is a schematic diagram to show the connections that need to be made to adapt a Koso DL-03SR aftermarket speedometer to the K-bike. I am assuming that the installation will use one of my TGPI boards to get the Neutral / Start Enable / speed functions.
(https://i58.servimg.com/u/f58/15/27/27/94/koso_d10.png)
Post by: jaxon on February 27, 2017, 03:20:49 PM
Doesn't this "Magic box" do cool things for Speedos?
http://cafe4racer.eu/en/universal-accesories-for-speedometers/296-marulabs-bep-3.html
Post by: jc55 on February 27, 2017, 03:39:21 PM
I dug and dug and dug and found an obscure post somewhere where you personally mention that the stock K100 speed sensor has 6 pulses per tire revolution.
A 130/90/17 rear tire has a circumference of 2090.4 mm
My question is, would you suggest setting the acewell circumference to 2090.4mm with pulse per rev of "P001".
Or, would you set it to 2090.4mm ÷ 6pulses = 348.4mm and set the pulse per tire revolution to, "p006"?
Post by: rbm on February 27, 2017, 04:31:34 PM
RBM, I'm trying to dial in my Acewell 2853 speedo before my first ride, by taking out the guess work with the TGPI.I can comment on my Motogadget and I have to assume that the information can be carried over to the Acewell (but not sure). Short answer: neither is right.
I dug and dug and dug and found an obscure post somewhere where you personally mention that the stock K100 speed sensor has 6 pulses per tire revolution.
A 130/90/17 rear tire has a circumference of 2090.4 mm
My question is, would you suggest setting the acewell circumference to 2090.4mm with pulse per rev of "P001".
Or, would you set it to 2090.4mm ÷ 6pulses = 348.4mm and set the pulse per tire revolution to, "p006"?
At the moment, I'm using the manufacturer supplied inductive pickup mounted on the front forks. I provisioned the left disc rotor with six magnetic bolts. I set the Motogadget to indicate 6 pulses per revolution (equivalent to your p006 setting) and set the tire size variable to be what I measured using a tape measure. For my front tire is a 110/80ZR-18 and the circumference became 1989cm. This put me in the ballpark for speed. I used a GPS app on my mobile phone and strapped that to the handlebars. Then I went riding as various speeds, attempting to compare the GPS indicated speed with the Motogadget indicated speed. I adjusted the circumference number until the two matched.
Post by: rbm on February 27, 2017, 04:34:00 PM
Yes, it does. It does everything that my TGPI card can do plus more, like interface to the 1985 fuel sender and bring out all the 24 signals on the OEM instrument connector to a set of terminal blocks. Makes modifying the K100 plug-n-play.
Doesn't this "Magic box" do cool things for Speedos?
http://cafe4racer.eu/en/universal-accesories-for-speedometers/296-marulabs-bep-3.html (http://cafe4racer.eu/en/universal-accesories-for-speedometers/296-marulabs-bep-3.html)
Post by: alex-wilson on February 28, 2017, 09:33:43 AM
And how come you chose not to use it yourself? :-)
Post by: rbm on February 28, 2017, 12:41:11 PM
Yes, I have boards populated with components that only provides the speed sensor shaping circuitry. It is significantly cheaper than a full board. I'm asking $21.00 plus shipping for such a board.
I don't use my own circuits because I'm essentially a lazy a$$. I built my bike before I had designed and built the current generation of TGPI boards and I haven't yet found the energy to retrofit one of them on the bike. It is in my TODO list though. If you read my blog, you'll also note that I have a much more complex on-board computer installed than the TGPI board. I also intend to upgrade that device one day.
Post by: jc55 on February 28, 2017, 12:48:53 PM
Post by: Laitch on February 28, 2017, 02:04:03 PM
. . . and I haven't yet found the energy to retrofit one of them on the bike.Try a spinach smoothie sweetened with agave syrup. If it has been blessed by a tribal elder, so much the better.
Post by: jaxon on February 28, 2017, 02:28:57 PM
Yes, it does. It does everything that my TGPI card can do plus more, like interface to the 1985 fuel sender and bring out all the 24 signals on the OEM instrument connector to a set of terminal blocks. Makes modifying the K100 plug-n-play.
Forgot to mention...
Your mod is still kick'n "A". It's great to have more than one option for a 20 year old bike and great people are still using their expertise to contribute.
Post by: bocutter Ed on February 28, 2017, 04:45:47 PM
Try a spinach smoothie sweetened with agave syrup. If it has been blessed by a tribal elder, so much the better.I offered maple cappuccino the other day ... no interest. :dunno
Post by: Ardinos on March 30, 2017, 06:32:21 PM
Post by: Laitch on March 30, 2017, 06:58:46 PM
I'll take one of them there fancy speedometer boards!To which device are you refering—Robert's board or the Marulab device?
Post by: rbm on March 30, 2017, 07:00:05 PM
Post by: Iliya on April 09, 2017, 04:12:21 AM
Post by: rbm on April 09, 2017, 07:23:45 AM
That schematic has been photoshopped. If you want the full schematic, send me a PM.
Post by: Iliya on April 09, 2017, 02:53:58 PM
What transistor should I buy? And should I put a resistor befor transistor like neutral drive?
Post by: jparado on May 10, 2017, 07:03:55 PM
Have a 1992 K100rs. Is the circuitry likely to be the same across the age range? Also, is pricing still current.?
Regards
Jeff.
Post by: rbm on May 10, 2017, 07:36:57 PM
Yes, the wiring is mostly the same for this device across the range of models and years for the K-bike. And the pricing is still current, as listed in the first post. The board design has changed slightly with the latest version but it still offers the same functionality.
Post by: jparado on May 10, 2017, 07:45:16 PM
Post by: Ardinos on May 10, 2017, 10:08:32 PM
Motoscope pro and M-Unit. It's a lot of work to do it right.
Post by: rbroen07 on July 31, 2017, 10:36:33 AM
I'm sorry if I missed anything, but has anyone been successful in using a Motogadget speedometer together with the OEM BMW speed sensor, by using any of the above mentioned methods/circuit boards?
BR
Rasmus
Post by: critter on August 31, 2017, 04:23:47 AM
keep up the great work
Post by: critter on September 01, 2017, 03:43:30 AM
Post by: rbm on September 01, 2017, 07:32:54 AM
Post by: critter on September 01, 2017, 12:27:43 PM
By 3-wire digital tacho, do you mean your gauge has a +12V wire, ground wire and RPM sense wire ? It may be possible to hook up the sense wire to the coil primary and have it work without any signal conditioning. Some guys find that the tach needle bounces all over the place though. It would be better to build a conditioning circuit like the one I describe in my post called "Engine Speed Condition circuit that prevents RPM tachometer needle from bouncing (http://www.motobrick.com/index.php/topic,10224.0.html)".yes pos ground and sig wires so i could try on coil but not from dash sig wire for the tacho and thanks for reply
Post by: rbm on September 01, 2017, 12:31:16 PM
Post by: critter on September 01, 2017, 12:43:08 PM
Yes, you can use the Black/Red wire on Pin 16 of the OEM gauge as the tachometer signal input to your digital gauge. Hook up ground to the bike's ground and 12V to the bike's switched 12 volt. It may work or it may not work; you'll have to experiment. As I posted, the signal is best conditioned to clean it up.how do i go about getting one of your gadgets could you send me details i will buy from you
Post by: critter on September 01, 2017, 12:51:12 PM
say i wanted to run a android tab as my dash useing one of many apps to view is it possable to get a obd2 device to be wired in to k100 to get enough info to work
Post by: rbm on September 01, 2017, 12:57:57 PM
Post by: critter on September 01, 2017, 01:16:11 PM
Sorry, there's no CANbus on the K100 and therefore no ODB2 and therefore no android / IOT integration. This bike's technology was advanced for its day but BMW could not have envisioned new millenia technology in the 1980's.ok i have a old 1981 e12 bmw 528i car that had a scan tool connection why i asked, wasnt sure if bikes had same setup shame one couldnt put a 4cyl 318i computor on k100 without to much nightmares
Post by: rbm on September 01, 2017, 01:37:49 PM
Post by: Letomoto on February 28, 2018, 06:40:10 PM
Very interesting stuff !
Post by: ibexonabike on April 29, 2018, 03:42:59 PM
Post by: rbm on April 29, 2018, 06:40:28 PM
Sorry for this inconvenience.
Post by: Simon89 on May 09, 2018, 01:16:55 AM
Post by: rbm on May 09, 2018, 08:28:44 PM
I am interested in all of the boards you have to offer so that I can fit aftermarket speedo to my k1100. Trouble is I live in the ukThat shouldn't be a problem. I ship to the UK and all parts of Europe.
Post by: Simon89 on May 10, 2018, 09:12:01 PM
Regards
Simon
Post by: rbm on May 10, 2018, 09:45:09 PM
Take a look at the User's Manual (https://drive.google.com/open?id=0B3UPbNZRyr1rQ04xbGJqSlRmZk0). It should answer many of your questions.
Post by: ibexonabike on May 22, 2018, 11:06:25 PM
For the moment, I have been forced to halt production.
Is this resolved? Inquiring minds want to know!
Post by: rbm on May 23, 2018, 06:40:00 AM
Post by: ibexonabike on May 24, 2018, 10:11:47 PM
Post by: JPMC on May 28, 2018, 03:54:57 PM
I am interested in the Gear Indicator and Start Enable Board and the speedometer, tachometer amplifier Board.i planing to install the motoscope-mini on my bike, will the speedometer board work with that? https://motogadget.com/shop/en/motoscope-mini.htmlAre you shiping to sweden?
RegardsJohan
Post by: rbm on May 28, 2018, 05:54:34 PM
I'll keep you in mind for one when the PCBs arrive. Yes I ship to Sweden, and the board should work with the Motoscope Mini. You will need to think about how you will integrate the Motoscope Mini and the separate gear display into an integrated instrumentation panel. You also have to think about whether you want the gear displayed to you as a number or as a lit bar on a linear display. These small details change the character and look of your final build.
Post by: MartinSK on June 26, 2018, 10:49:57 AM
I am also interested in your TGPI v5. Can you please let me know if they are available yet?
Thank you.
Post by: rbm on June 26, 2018, 07:38:58 PM
Yes, I'm producing the boards again after a short manufacturing stoppage because I was waiting for a newly designed PCB to arrive. Please send me a PM.
Post by: billy on August 06, 2018, 10:15:29 AM
As I have mentioned in previous posts to other discussion threads, I'm designing and building circuits to adapt the K100 electrics to aftermarket gauges.
Gear Indicator and Start Enable Board
The TGPI design has gone through a few iterations, with the current version 4.1 being based on a micro-sized Arduino processor. This design is adaptable because of the on-board computer and can display the gear in a multiple of ways:As shown in the photo below, there is a separate 7-segment display board with a cable length of 150mm, however a custom length can be provided if required.. The intention with such a short cable is that the board and display will be together in an enclosure. It is possible that this arrangement does not meet with your intended design. When ordering, I will exchange information with you to understand how and where the board will get use. This allows me to tailor the display umbilical cable to a length that suits your build.
- With a numeric digit using a 7-segment 0.39" LED display
- With up to 6 LEDs, each LED representing a selected gear
- With a direct connection to an aftermarket Koso gauge which has inputs for displaying a selected gear
- With up to 6 incandescent bulbs, similar to the LEDs, but for a retro look when placed behind a bezel
The Gear Indicator and Start Enable Board also has circuitry to amplify and condition the speed signal coming off the rear drive. Many modern aftermarket speedometers require the use of an active inductive sensor that outputs large voltage levels (>7 volts) for the meter to work properly. This usually means adding a magnet and aftermarket sensor to the front wheel to get that signal. The variable reluctance (VR) sensor in the final drive of the K100 is not capable of reproducing these active signals without help. The circuit on this board will amplify the weak VR signal from the K100 sensor, making it usable for a range of aftermarket speedometers. This means one can re-purpose the OEM sensor and avoid adding additional sensors to the bike.. This feature means that you don't have to use the manufacturer's speed sensor and worry about finding a place to mount it.
I have developed the next version of the TGPI board (v5.2). This version includes new functionality and a fundamental change in the design. There is a circuit now that will condition the engine RPM signal available on the Black/Blue wire (Pin 16) of the OEM cluster, and make the signal compatible with aftermarket tachometers. I have also included a more robust power supply onboard along with a resettable fuse and transient voltage protection. This will result in a more robust reliable board than previous designs. Finally I have integrated a circuit on the tachometer output that adjusts the signal to make it compatible with one particularly popular Chinese aftermarket gauge.
(http://i65.tinypic.com/2qsz3vb.jpg)
The overall size of the board is 4cm X 6cm.
The change in design with v5 means that I manufacture the board based on the type of display you desire. There are two versions of the build and unfortunately, they are not interchangeable between themselves. That means we collaborate during the ordering process to make sure I supply you with the correct version of the board.
The tested board and LED display is targeted at $75.00 CDN plus shipping.
TGPI User's Manual Online (https://drive.google.com/open?id=0B3UPbNZRyr1rQ04xbGJqSlRmZk0)
Speed and Tachometer Conditioning Circuitry:
If all you're interested in is just the speedometer amplifier circuitry or just the tachometer conditioning circuitry or both, it is possible for me to build only that function on the board and largely ignore the rest of the components. The cost is significantly reduced, down to $27.00 CDN plus postage, for that board.
(http://i67.tinypic.com/znlvet.png)
3 Circuit Switched Fuseblock
(https://lh4.googleusercontent.com/-grfBBfqlx0o/VAj4-coqlRI/AAAAAAAAD84/2lwmlcXs3jU/s800/20130424-acc-fuse-003.jpg)
This board provides three switched 12 volt fused circuits in a compact 5cm X 5cm package for powering accessories that you add to your bike. The switching relay is provided on the card, which simplifies the installation. These circuits can handle up to 30A current total (the limit on the switching relay's contacts) and has a LED for power indication. The tested board is $21.00 CDN plus shipping.
The prices are very close to my costs just for the parts that are used. I'm making no money on these, but making them available to support the community of K-bike owners.
4-Relay Neutral Detect:
I have designed a printed circuit board to simplify the construction of the popular neutral detect circuit using four relays. The board using through hole components which should be easy to source locally in a number of markets. I was thinking of supplying this design in a flexible way, to meet different budgets and skill levels.The board overall is 5cm X 5.2cm in size. It will take input from the TGPI switch and output a Start Enable signal and an active-low Neutral signal whenever the transmission is in neutral position.
- A completely assembled and tested circuit (first photo)
- A kit consisting of the PCB and all parts ready to be assembled (second photo)
- The raw PCB
(https://lh3.googleusercontent.com/wgnpLbwhSaPxCu24gWGouaFUlFRmKUSlLeEfXD4pwzT6pDpke4wFkjkCOoX-ohAek9OEzzwkL8GgtqL05-vzLQNLi5swmdG0mN2o1hL-0O8wGV5RZH2Yv4k_j17izFtnmWfG_tpbFhWAidEE6GA-NWajgGfrtxJNKkLH27RFnqRluo24YslTvFd8CAzX3zrxH6KsLTsowldGw_uCJ4xRySqDM0Ksg4Sham3jWTqrnhCE2ELBmJjgTnrkKO6NY3dxwATT0FTOoqSqSqkTif_wjF550LkfdMBhO5MKTs5uWRPGoG3YoxUH53dcQmCJK7iOGI27YmiueA-exUqfCS2reNaO3rzT7DvwEh1i9WdmHsHJJ06x74UBpp7MBKcl3opvpCcqWtOaqE5UIgykuvbm98QEJYGaABNYQ_-9JgLcTYIHnBbUi6UpBAAs-_pvlNKVpJL856lavcAa5dZQ8y6aPk3yn3mWhQuZJwDJNRF20UiQ39UB3OC2DX9nKpOnddCtmGxuxW4nCXFanX_0TGYnkikzOXC6SsYKi6YihdU83ks_QVEBcWlRH47OPJ4XzOg6SYLkUFlVRLzTRXV26IqaZS6YiyKIn48_1frGRAn3DAMu7poz87Qiqs6z=w1208-h1398-no)
(https://lh3.googleusercontent.com/BdyX2J0S_7JWB1De7shFlMei-t85Gi1nKVsAbI4geGjOarS9pKyq4RuMH1pjvNr6HRjMsGo5eMDcPyzB_zkf5lWB1VvdzK4E7k9w2lJFDJoyHm5g7eZUeK5hm8OCx9ChWxbME-ny_tr_DgFdvHJ1WUZEp0XB_DXyfECBLuLse447mp9y3yUngSMTSL0c8Gxe2smuQ7m_TDgPAoU2bJ_kcOEO-UutUjbTc-49bl_cdISmji6FAujTBXKsGkKr1rZ2iPWn5rRHRBONA3bsk8mLTS_04iplJmikDRq-6cS2gj_5bH_pt2AU5oZljBtsBRjl-0bTrpk58NdyXsT914eRvMCoBmNPFGzv7cHCiSZihzgU9k8n7V18kWEGnxBHU06SnM1AvfVww9bMC69U13gMu0_XpqiDEb7aQO9ypWsbSFdFUejiI3p3jDmQL-9nYA5T1dy96PY5qxf6FP5DlqRc2MFvYuPqevqW7JPvEGL-G9mBydRxPouiKnfwKf55d5Ce7BqrQNb4FZvC-NxVeyIGcQUdim7jDUHpk2_yXZzSo8ubvBLZKXDksAJC4ajMCiZxVxLeG9mPP7z_5lB2FRUxZzAf23J09NwtBrWJibCItO17TC6Q1XbgTIA8=w1920-h1398-no)
Post by: billy on September 29, 2018, 08:42:14 AM
i am building a custom K1100LT (1994)
i have purchased the cheap ebay clock as i want a new smaller speedo
would like to purchase a board to work with as much functionality as possible
Neutral, indicators, temp , ect can you tell me how to buy one please
when i have it working intend to but the Motogadet Motoscope pro
Best Regards
Mark
Post by: johnny on September 29, 2018, 09:32:29 AM
i gotts one you can buy... i took oem and put it in my ezbake oven to shrink it down... pulled it out at approx 50%...
this looks full size oem... butts is only half the size... see photo attached...
i can dhl it to you today... paypal only...
DSC02481.jpg (55.2 kB . 768x576 - viewed 839 times)j o
Post by: N68gp on October 20, 2018, 07:32:35 PM
Genius!!
Post by: RedBrick on November 07, 2018, 06:19:52 AM
I hope these circuits are still possible to buy, it would save a lot of time and scratching my head trying to solve problems!
Post by: billy on November 08, 2018, 04:15:53 AM
its a staight plug in to the harnes that goes to the old Speedo
Post by: Laitch on November 08, 2018, 10:20:14 AM
also look at Cafe4racer german guys have developed Bep v3You posted once that you were converting to an aftermarket speedometer, billy. Have you had experience using the BEP? How well did the conversion go?
its a staight plug in to the harnes that goes to the old Speedo
Post by: sgriffin on January 22, 2019, 03:22:18 PM
I am working on rebuilding a 1994 K75. The bike has <13k and is immaculate so its almost a shame to take it apart but I want it to a bit more interesting. I have been reading about RBM's TGPI board as well as the BEP 3.0 solution.
My goal with instrumentation is to retain as much of the factory dash functionality as possible as well as other K75 logic i.e. start enable on neutral, charging circuit, indicator cancel, and fuel level or warning.
As far as the gauge goes, I'm thinking about the new Koso TNT-04 (https://kosonorthamerica.com/tnt-04-multifunction-meter-now-available/) or the Acewell ca085 (http://www.acewell-meter.com/portfolio/phasellus-erat-mi-aliquam-vitae-diam/). I'm not sure which one is a better integration. I have read the Motogadget units integrate well but they are quite a bit more costly.
My strong preference between the two circuit options is to use the board RBM produces. He provides a huge amount information to that end on this forum and that is admirable. And that user manual is crazy good.
So, RBM if you see this please let me know if you are interested in selling yet another circuit board.
Post by: rbm on January 22, 2019, 07:27:06 PM
My TGPI board is similar to the BEP 3.0. The BEP has differences over my board. For example it does all the things my board does except output the gear number on a 7-segment display. The BEP can only output to a discrete display. The BEP has additional features over and above what I can offer such as interface for charging light, most of the indicators are brought out from the OEM cluster, and it can work with the old fuel level sender. My board does not do these things. Having said that, it is simple to wire up indicators to the OEM harness, including the charging circuit, without help from my TGPI board. I had specific goals in mind when I designed my board, the same as Maru. My primary design objective was to offer the most useful functions within a given board size. Maru's goals were more ambitious than mine.
Both of those gauges you link to are not compatible with the discrete outputs from either the BEP or the TGPI for displaying gears. The Koso TNT has calculated gearing, and the Acewell has nothing. Both of these gauges are compatible with the single 7-segment display function of my TGPI but you'd have to design an enclosure for the separate display module. The Motogadget gauges are awesome but they aren't easier or harder to integrate. They are very high quality but you pay for what you get.
Post by: sgriffin on January 22, 2019, 10:30:38 PM
Just so I am clear on the TGPI board,
(1) gear indication can be done on separate 7 segment display
(2) charging circuit connects directly to the gauge or separate indicator. My understanding is the logic of the charging circuit detects lamp illumination by maybe resistance to know when to charge?? and
(3) no solution for reading the old fuel level sender?
Needless to say, I need to think about what my priorities are. There may need to be some compromises and allowances compared to the stock indications. In the beginning, I thought this would be rather simple but after much research I have realized I have yet to see an example for inspiration where I thought "this is it".
Thanks again for your input.
Post by: sgriffin on January 23, 2019, 10:01:20 AM
Post by: rbm on January 23, 2019, 04:31:31 PM
Just so I am clear on the TGPI board,Yes, correct.
(1) gear indication can be done on separate 7 segment display
(2) charging circuit connects directly to the gauge or separate indicator. My understanding is the logic of the charging circuit detects lamp illumination by maybe resistance to know when to charge?? andThe alternator field winding coils can/will connect through a LED indicator on your gauge if you desire to have a visual indicator of charge. Some builders choose to forego the indicator and use a resistor in place of the indicator. In any case, a resistance of some sort is needed in the field coil exciter circuit, be it a LED, bulb or resistor. This limits current. What current? The current from the battery that energises (excites) the field coils of the alternator to get the whole charging process started. What causes the light to illuminate? The difference in potential between the battery terminal and the regulator output. When the engine RPMs are low, the regulator output is below the terminal voltage of the battery and the LED lights up. When the engine RPMs raise and the regulator output voltage increases to or above the battery terminal voltage, the LED extinguishes.
(3) no solution for reading the old fuel level sender?
You thought: I found answer to #3 fuel sender operation on K100-forum. http://www.k100-forum.com/t9265-messing-with-the-in-tank-fuel-sender would work with the old sender, but it won't. I presume with the "old sender" you mean the one with thermisters. If so, the following will work apparently.
http://www.k100-forum.com/t13947-install-acewell-2853-cluster-in-bmw-k100-1984#165196
http://www.motobrick.com/index.php/topic,11953.msg104846.html#msg104846
Post by: sgriffin on January 23, 2019, 06:02:18 PM
My #3 statement was confusing by saying "old" fuel sender. I had that on my mind after reading your opening discussion on the topic that the BEP can work with the old one. Not sure if BEP works with the "new" float style throught the OEM harness but from your other forum discussion 180 flip does the trick.
One a separate note, I found what I thought was an interesting variation of the Acewell CA85 (https://www.acewell-meter.co.uk/Acewell%20Speedometers/ACE-85mm/CA85+BMW+and+Japanese+Face.htm?action=full&id=304). This one available from Acewell UK site offers BMW style scale and options for machine bezel and sleeve. This may be widely know on the forum but was new to me so I'm sharing for anyone interested in maintaining a BMW look for their instrumentation.
Post by: rbm on January 23, 2019, 10:29:30 PM
Post by: zonex on March 06, 2019, 08:28:29 AM
$75 Canadian plus shipping is still the price? shouldn't be too much as I'm down the 401 in Windsor
Post by: MAD on June 11, 2023, 12:34:12 PM
I'm trying to connect the following speedo to my K75:
[ Invalid Attachment ]
So far, I have managed to make the following items to work:
- high beam
- indicators
but I haven't been able to make the following items to work:
- speed
- rpm
- gears
- neutral
- fuel gauge
I was wondering if there is anybody who had past experience with this type of speedo that can help me with my project.
Many thanks in advance.
Post by: rbm on June 11, 2023, 05:56:41 PM
Post by: swedish_brick on September 15, 2023, 12:15:03 PM
Been lurking here for a long time and really love what this community does for us K-bike owners.
Robert, I was wondering if its still possible to buy a speedometer amplifier circuitry from you?
I am in the final stage of a cafe racer build with my K100 RS -84. It would be awesome to get the original speed sensor to work, and not have to use the sensor that comes with the Motoscope Pro that i have installed.
Have a good one!