Hi guys, I just wanted to get a cheap ebay LED voltmeter on my bike but want it on a circuit that turns off when the bike is off. Can I just wire it to the positive and negative on the "cigarette" outlet?
It does work and with no load the voltage reading SHOULD be accurate anyway. It usually isn't and it should be. With no current flowing there can't be any resistive losses, I suspect the error is due to noise pickup rather than voltage drop. As Rolex mentioned you can compensate for the inaccuracy anyway but it is annoying.
Also note, what may be more useful - you can get combo voltmeter and USB outlets. The meter will still be inaccurate, but the USB sockets may be useful.
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