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Electronic Field Disturbance Monitor
designed by David A. Johnson, P.E.
Thursday, December 17, 2015 01:44 PM
Electronic Tips -
Hobby Circuits -
Electronic Field Disturbance Monitor -
100+ Construction Ideas
Battery Voltage Monitor
Another voltage comparator A4b is wired as a battery voltage monitor. Should the
battery voltage drop below about 6.8 volts, the power indicating LED will not turn on,
giving the user an indication that the battery needs to be replaced
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