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RJsfishin's avatar
RJsfishin
Explorer
Sep 19, 2014

LCD Backlit DC Voltmeter (doesn't require power)

I received this yesterday, (beeeeautiful) says it doesn't use any power. Now I'm not the smartest when it comes to elect tech, but CS alone tells me that is impossible. What you say ? http://www.eba...
tenbear's avatar
tenbear
Explorer
Sep 19, 2014
If you can put the shunt in the negative lead of the battery, then the "hot" wire would only be milli volts above ground. Shorting it to ground would not be a problem. Of course, if the shunt would open up then all the current would flow thru the meter wiring. A good reason to put a fuse in the "hot" meter wire.

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