I am building for my senior project this semester a "heads up" LCD ALDL display using a AVR microcontroller interfaced with a 160x128 graphic LCD. The circuit will read data off the ALDL port from a 7730 do the necessary calculations and display the resulting engine data to the LCD.

I need to build a test bench circuit or else this project would be impossible for me. I was wondering if anyone had a schematic for a ECM test bench they could post?

Here are my plans for bench:
I was planing on using 555's with flipflops to make 50% duty cycle for RPM, VSS, and O2 simulator (I know O2 is not needed but would make the bench more complete). If someone already had the circuit diagram and resistor and cap values already sorted out it would save me some time.

Thanks,
Luke

 

To link the threads together, here is my start on building a bench.

 

Jp86SS,
I somehow didn't see your thread when doing my searches. Thats definitely helps, thanks.