12v Battery indicator

281

06:37:17

The indicator was therefor designed to forestall any incipient failure by providing ‘at a glance’ information on battery state with three coloured LEDs.
Green indicating a battery voltage adequate for normal use,
Yellow that the voltage was fairly low and
red that the cell was dead.

published 10 years ago

Lucan01

10 years ago

What npn do you use?

ahmedelc

10 years ago

Lucan01 ... you can use bc547 or c945 as npn transistor working in that circuit very well.

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