Project that can control a 6 cylinder automotive tachometer without code modification. This uses the fact that modern day automotive tachometer is controlled by frequencies with a 50% duty cycle. We use a 12V transistor controlled by a tone pin on the arduino to modulate frequencies at 12V for the tachometer. This can be used in conjunction with other sensors to mimick a car dashboard or for simracing. This is also how the popular racing software "SimHub" does this control. Soon to be released is code for a Project Cars 2 UDP telemetry interpeter that is a fully functional digital racing dashboard.
Usage:
- Connect the tachometer based on the schematic provided in the files or on the Arduino page linked below:
- Modify the code's tone values to change the angle of the tachometer's needle. Note: Higher cylinder count tachometers will require different frequencies
Links: