Technical > Wiring & Sensors

rev counter input?

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Tony C:
fitted the resistor as above today and no tach,
am i missing something?

gunni:
Now you need an oscilloscope on the wire or a light bulb to see if there is anything on the wire

Tony C:
so instead of going to the tach, if i run the tach wire to a bulb, and the other side of bulb to 12v yeah?
it should flicker on and off at idle yeah?
or have i got that wrong?

gunni:
Tach is the 12v, other side to ground.

It should flicker in relation to the rpm´s , the more rpm´s the faster it will blink and brigther

Tony C:
cheers mate, will give that a go this week,

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