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USB
Simple but reliable car battery tester

Simple but reliable car battery tester

This circuit uses the popular and easy to find LM3914 IC.

4 comments Not Tested
Automotive 12V to +-20V converter (for audio amplifier)

Automotive 12V to +-20V converter (for audio amplifier)

The limitation of car supply voltage (12V) forces to convert the voltages to higher in order to power audio amplifiers.

5 comments Not Tested
Car battery Indicator

Car battery Indicator

Description This is a really useful instrument for your car.

5 comments Not Tested