I would still use a coin cell.
The voltage regulator will use far more current than the RTC itself and if the car battery gets disconnected then the RTC will stop.
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I would still use a coin cell.
The voltage regulator will use far more current than the RTC itself and if the car battery gets disconnected then the RTC will stop.
Keith
www.diyha.co.uk
www.kat5.tv
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