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4hv.org :: Forums :: General Science and Electronics
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Engine RPM meter

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Blizzara^
Mon Dec 21 2009, 07:45AM
Blizzara^ Registered Member #2550 Joined: Thu Dec 17 2009, 04:25PM
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Posts: 4
 		Interesting, I will test the circuit with a PNP transistor when I get my soldering iron working. Tip burned : (

Just looked at the timing light, and fell off my chair.. It is cheap. I'll have to transfer some money to my paypal account and buy that/similar. So that just snaps over the ignition wire and 12v battery, and then blinks a light every time there is a ignition pulse? Just wondering, can a photodiode & timing light handle so much rpm? My engine spins at 12 000 - 13 000 rpm max depending on the cylinder and exhaust I am using.

Thank you so much for your time!
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