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Circuits designed by David Johnson, P.E.
Last Updated on: Friday, November 17, 2017 06:32 AM

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More  Constant Current / Current Sink

1 AMP CURRENT INJECTOR


When you need to measure resistance down to a few micro ohms, this circuit works great. It is powered from two "C" cell batteries and is designed to inject a well regulated one Amp of current into the unknown resistance. By measuring the voltage drop across the resistor with a digital voltmeter, the resistance value can be accurately measured. The circuit also is equipped with a low battery monitor. For more details on this circuit, click herePublished in Popular Electronics, November 1992

Click on Drawing Below to view PDF version of Schematic

Circuit 1 AMP Current Injector designed by David A. Johnson, P.E.



More  Constant Current / Current Sink

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