Car battery monitor III

Posted on Mar 1, 2013

The circuit is quick and easy to put together and install, and tells you when battery voltage falls below the set limit as established by Rl (a 10,000-ohm potentiometer). It can indicate, via LED 1, that the battery may be defective or in need of change if operating the starter causes the battery voltage to drop belciw the present limit.

Car battery monitor III
Click here to download the full size of the above Circuit.

You can use the 2N3904 or any equivalent.

Leave Comment

characters left:

New Circuits



Popular Circuits

NiCd/NiMH Battery Charger
fogger timer
test beeper for audio amplifiers
simple 100 watt inverter
Amplifier Circuit Output Relay Delay Audio
PWM Lamp or Motor Controller
Geiger Counter
A New Solar / Wind Charge Controller Based on the 555 Chip
10 Way Electronic Switch
DC Motor Tutorial
The microprocessor circuit using a power linear regulator