I'm assunming the brake light switch 'sensor' is safe to connect to one of the Analog Input 1-7? I think it may be 12v so not sure of that would hurt the race capture. Also I just want it to be on/off. How would I set up and configure that?
-Scott
How to get RPM on BMW E30 M42 DIS.
Moderators: JeffC, rdoherty, stieg, brentp
It would work on an analog input channel, but I'd recommend hooking it up to one of the digital i/o channels and save the analog channel for something else in the future. The default jumper setting configuration should be set as input, so you should be good to go there. Configure the channel name and a sample rate, and you should be good to go!
Warning: This negative lead connected to the ignition coil has a 500v voltage spike that RaceCapture/Pro isn't designed to handle.
Additionally, the signal is very noisy and would not provide a good RPM signal without proper conditioning.
We are working to release a small adapter board that can safely interface this coil signal to RaceCapture/Pro's pulse input. The technical information can be found here:
https://github.com/autosportlabs/coilx
Additionally, the signal is very noisy and would not provide a good RPM signal without proper conditioning.
We are working to release a small adapter board that can safely interface this coil signal to RaceCapture/Pro's pulse input. The technical information can be found here:
https://github.com/autosportlabs/coilx
Good to know - thanks.brentp wrote:Warning: This negative lead connected to the ignition coil has a 500v voltage spike that RaceCapture/Pro isn't designed to handle.
...
We are working to release a small adapter board that can safely interface this coil signal to RaceCapture/Pro's pulse input. The technical information can be found here:
https://github.com/autosportlabs/coilx
For fuel, Brian's settings was close but not great. So I removed my fuel sender from the tank and with it still plugged in I read the value at 0, and then flipped it over to get the reading at full.
My values:
0.55V=100%
2.9v=50% (Filled car up till my fuel gauge read ~1/2)
4.3v=0%
I did this with a battery tender on so you get similar readings to when car is running at high RPM (alternator full charging).
FYI, Brian's settings were:
0.50v=100%
1.25v=75%
2.0V=50%
2.75v=25%
3.5v=0%
-Scott
My values:
0.55V=100%
2.9v=50% (Filled car up till my fuel gauge read ~1/2)
4.3v=0%
I did this with a battery tender on so you get similar readings to when car is running at high RPM (alternator full charging).
FYI, Brian's settings were:
0.50v=100%
1.25v=75%
2.0V=50%
2.75v=25%
3.5v=0%
-Scott
Last edited by sbarton on Tue Aug 20, 2013 6:48 pm, edited 1 time in total.
Yep, mine is like that too Denny. Its a known issue and Brent is looking I to it.
http://www.autosportlabs.org/viewtopic. ... 9535#19535
http://www.autosportlabs.org/viewtopic. ... 9535#19535
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MichaelDrost
- Posts: 30
- Joined: Tue Aug 13, 2013 12:15 pm
- Location: Amersfoort, the Netherlands
Hello all,
Just to add a little of my experience: we run e30 325is and the brakepedal has the brakelight trigger at the top of the pedal. This sends the 12v to the rear brakelights. What we've done, is to tap of the positive, back to our logger (for obvious reasons), but along the way split it off to a led, positioned in full view of the onboard cam (Go Pro mostly). Now my post race process is to take the onboard video, the collected data and mate it, using DashWare.
Synchronising video and data is done in seconds that way and as an added benefit, I always have a graph on screen that shows the brake signal graphed against time. This helps me helping the driver get to grips with braking points and such, because you can see the spike approach in the graph, without having to go back and forth in the video. The graph trick also helps spotting patterns, while reviewing onboards (current kit is Race Logic Driftbox w/ input module and GoPro Hero2 and kit to include RCP as soon as possible).
Hope this helps!
Michael
Just to add a little of my experience: we run e30 325is and the brakepedal has the brakelight trigger at the top of the pedal. This sends the 12v to the rear brakelights. What we've done, is to tap of the positive, back to our logger (for obvious reasons), but along the way split it off to a led, positioned in full view of the onboard cam (Go Pro mostly). Now my post race process is to take the onboard video, the collected data and mate it, using DashWare.
Synchronising video and data is done in seconds that way and as an added benefit, I always have a graph on screen that shows the brake signal graphed against time. This helps me helping the driver get to grips with braking points and such, because you can see the spike approach in the graph, without having to go back and forth in the video. The graph trick also helps spotting patterns, while reviewing onboards (current kit is Race Logic Driftbox w/ input module and GoPro Hero2 and kit to include RCP as soon as possible).
Hope this helps!
Michael
Hey Matt, any update on your E36 install?Matt D. wrote:Awesome information, by the way. I've just installed RC/P into our E36 328i and have been pouring over the wiring diagrams for a week. I looked at the fuel gauge plug first because it seemed the most simple, and what was said up above concerning the E30 is exactly how the E36 looks.
I'll start an E36 thread in the next week or two to share what I find.