This project is so complex :)

1- LED tachometer (right one)
2- LED speedometer (left one)
3- Digital (seven segment) display for Speed, RPM & engine temerature. I'm switching between the 3 inputs using one of the car's original rotary switches.

Full instructable here

good work <br>ya Abo Hosny <br>it's nice to publish your work , not only in Nilemotors ;) <br>waiting for the completed circuit
corolla man :) <br> <br>here is the whole experience <br>https://www.instructables.com/id/Digital-multimeter-for-your-car/ <br>
did you build this? If so How?
Yes. I'm making the instructable right now!. <br>will post a link here

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More by abo_hosni:Using a stepper motor as automtive speed sensor Transform a trimmer potentiometer into a multiposition rotary switch Digital multimeter for your car 
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