Arduino rally computer

Short demo of an Arduino based, open source rally computer similar to a Brantz or Terratrip unit.
The project page for this (Incl source code) can be found at: http://code.google.com/p/rallyduino/

Category:

Science & Technology

Tags:

• arduino
• rally
• computer
• terratrip
• brantz
• tripmeter
• lcd
• rallyduino

[hannas1234]

Awesome! What are you using for inputs and how are you calibrating them?

[noisymime]

@hannas1234 The input is a hall effect sensor on the front wheel reading pulses as the back of the wheel studs pass by. Calibration is the same as any rally computer (Drive along a known length of road), although the calibration number is equal to the tyre circumference in mm divided by the number of wheel studs, so you can get fairly close with a simple measurement.

I'll have to put a followup video up showing it running in the car.

[hannas1234]

@noisymime Thanks! Do you think the same could be accomplished with a ABS wheel sensor?

[noisymime]

@hannas1234 It would depend on what kind of sensor it is. Basically it just needs to provide a 3-5v square wave pulse, which is basically any hall or optical sensor. If its a VR sensor it will still work, though you'd have to do some trickery to clean the signal up.

[hannas1234]

@noisymime Also, could it be programmed to read in hundredths of a min rather than seconds?

[noisymime]

@hannas1234

Sure, the controller itself is actually already doing this, but is only displaying in seconds as the LCD I'm using does not have a particularly good refresh rate.

[MadMurphyGames]

This looks interesting. Good job.

[KOSUB11]

You left the plastic on the LCD screen

[fsrslug]

Not sure if my message directly to you was sent. I am looking for the source code.

Thanks,

John

jbjerke at gmail c0m