LED test, using freshly calibrated power supply. At 12.1vdc, LED flashes red. Sorry, can't catch this in pic, but shows how testing was done.
LED daytime display
Single multi-color LED voltmeter 5mm LED, 8mm panel hole mount, tiny/sealed magic box, 2 feet of wire.
LED voltage values and reporting display
LED test, using freshly calibrated power supply. At 12.1vdc, LED flashes red. Sorry, can't catch this in pic, but shows how testing was done.
LED voltage monitor. Starts displaying green at 13.2 vdc
LED voltage monitor, starts red/green flashing at 15.2 vdc.
TwoManyXS1Bs

LED test, using freshly calibrated power supply. At 12.1vdc, LED flashes red. Sorry, can't catch this in pic, but shows how testing was done.

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SparkBright LED voltage monitor
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