T&L Publications

How about a little PIC processor with an input counting pulses and then spitting out a trouble in real words on a little 16x2 LCD. May be a lot of work just to find out it's time to change the spark plugs.

I like one of the original ideas, use a relay. The coil has a threshold on/off voltage that might serve the purpose.<p>WS<p>[ July 24, 2005: Message edited by: yesiam ]</p>

<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by Chris Smith:<p>My Tesla coil would light a Twin Forty at over eight feet away. <p>About 200,000 plus volts, and when It landed on me one day after falling over, I thought fleas ...

Kind of reminds me of trying to figure out whether 32 deg F. is melting or freezing. I personally like the logic that hovers in the 2.5vdc area of a 5vdc digital system.<p>WS (used to be from Rolla, Mo....now in NYC)

Allegro Microsystems has an interesting 5-pin hall-effect chip that can handle up to 50A AC/DC with a proportional output operating at 5Vdc.<p>WS