12v automotive electrical voltage

Posted on Feb 5, 2014

When troubleshooting the 12v electrical system of an automobile, its nice to possess an easy voltage indicator tool rather than a voltmeter. This electronic circuit, is powered by 2 AA or perhaps 2 N cells, which can offer enough energy for years of service. The circuit has solely two leads. One lead connects to the chassis ground of the automotiv

12v automotive electrical voltage
Click here to download the full size of the above Circuit.

e. The second lead will be sharp tip probe. The circuit can indicate if an automotive electrical circuit has zero volts or 12 volts present. If the voltage is close to +12v, a inexperienced LED will activate. If the voltage is close to chassis ground a red LED will activate. If the circuit is open, neither light will light. The circuit attracts so few current in the open standby mode that no on/off switch is needed.

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