I built a LED panel voltmeter into the front of the coin holder. The coin holder still opens as it should too.
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Thanks Gary. It's large enough and bright enough to be read easily when I look at it but fitted low down on the dash so that it's not distracting. The LEDs are a nice green colour to match everything else.
The only way to measure the correct vehicle voltage is at the source, and that's the vehicles battery terminals, not down the line and via a cigarette/accessory socket, it seems not a lot of people know that.
As for volt meters in cars,![]()