REVELTRONICS

Art,

I purchased the attached mechanical to digital speed sensor that I've installed in my transmission. I want to verify the connections before actually wiring it up.

It uses 3 wires: 12v power, Ground and Signal



UTComp doesn't have a 12v supply, so I'll supply it power externally. My question is on the "Signal" wire. I presently have it marked to connect to pin A22 (VSS). I presume this is correct? I only ask because of the 12v power.

Thanks!

PS - First engine start this weekend!

Hello,

Yes it's fine but I think that you should also connect pull-up resistor (e.g. 4,7kohm or 10k ohm) between signal wire and power supply wire (+12V pulses for VSS input is fine).

Seems to be working w/o pull up resistor but will add one. Thanks!

Maybe there is already pullup built-in sensor (you can measure resistance between power and signal lines)