Battery Low Voltage Indicator

8,241

This is a simple circuit that was submitted, the purpose was to check the voltage of a golf cart battery that was not in use did not fall below a certain level, if this occurs then the performance of the battery can fall and eventually a new battery may be required. These can be costly, this simple circuit which costs a very small amount will light a LED if the voltage drops below about 11.5v.

Schematic

Battery Low Voltage Indicator
Battery Low Voltage Indicator

Parts List

QTY  PART-REFS           VALUE
---  ---------           -----
Resistors
---------
1    R1                  1k
Capacitors
----------
1    C1                  1uF
Transistors
-----------
1    Q1                  BC557
Diodes
------
1    D1                  10v
1    D2                  LED
Miscellaneous
-------------
1    BAT1                12v
1    RV1                 5k

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