Page 1 of 1

one 0-5v sensor running on both MS and ext. gauge?

Posted: Fri Apr 10, 2015 2:27 pm
by Aircooled
I'm sure this has been asked before but I couldn't find it trying to search.

I have an Autometer oil pressure gauge and I was wondering if I could tap that single sensor to run into both the gauge and the Megasquirt (so I can datalog it). I would assume so but I want to double check.

Thanks,
-Aaron

Re: one 0-5v sensor running on both MS and ext. gauge?

Posted: Sat Apr 11, 2015 8:31 pm
by Bernard Fife
Aircooled,

The inputs on MegaSquirt are high impedance. That means they draw relatively small currents from voltage signals, and thus they can share voltage signals with other devices.

In general, where this doesn't work is sharing resistance signals (typically temperature sensors) between ECUs.

There is more on this here: http://www.megamanual.com/v22manual/sharesen.htm (this is specifically about sharing sensors with other ECUs, but sharing with a gauge is very similar).

Lance.