| Author | Topic |
|---|
Location:
Brisbane
Registered:
May 2002
|
|
Re: Tachometer Operation/Waveforms
|
Sun, 04 September 2005 12:11
 
|
 |
Haha yep, the more I think about it I think that is ground triggered...(yeah stupid degree, I still know nothing  lol)
Well I suspect that it is differently triggered, not just ground triggered i.e. the voltage drop from +12v to ground is enough to trigger it, in that case a 12v square wave should work... I will get my function generator and test this as some stage.
If that is the case then it would simply be a matter of connecting 1 end of a resistor (say 1k ohm) to the battery and letting the other end get grounded by the igniter 5V square wave...this would make a nice 12v square wave  (replace the relay in the above schemetic with a resistor...).
Cheers
Wilbo
|
|
|
