Need a circuit that can capacitively or inductively detect a spark from an IC engine.
I need a circuit that can capacitively or inductively detect a spark from an IC engine for a project. Google was unhelpful, figured I'd ask a much smarter knowledge engine.
I've got a little hour meter for a motorcycle that senses the spark with an insulated wire wrapped around the spark plug wire. I'd like to do the same. Right now I'm assuming I can hook the wire "directly" to an input pin with a weak pull-down and it would work. (I'd include a protection network) Still I'd rather start with a proven and tested circuit.
Lawson
I've got a little hour meter for a motorcycle that senses the spark with an insulated wire wrapped around the spark plug wire. I'd like to do the same. Right now I'm assuming I can hook the wire "directly" to an input pin with a weak pull-down and it would work. (I'd include a protection network) Still I'd rather start with a proven and tested circuit.
Lawson
Comments
It's been a long time since I played with that sort of thing, so the resistance value may be off. Try searching for some articles on building an electronic or digital tachometer. They were typically done using a plug or distributor connection.
http://www.edn.com/design/other/4325366/Spark-detector-uses-proximity
C.W.
Erlend
It's almost magical.