Test bench set up working well.

Today I have built the Ion current bias generator and tested it on our test bench. The results show that the circuit charged up around 80v from the coil back EMF. The old ignitor has been replaced by a Toyota ignitor and a frequency generator has been used for the trigger signal.

Dual channel zero crossing circuit made

Today I have built a two channel zero crossing detection circuit for use with the PIC32. This circuit converts two variable reluctance position sensor signals into square wave digital signals that the PIC32 can read directly. This design features two LM1815 chips and is simply built on veroboard. I have tested it on our test bench with good results on the scope.