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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 here.
Published in Popular Electronics, November 1992
Click on Drawing
Below to view PDF version of Schematic
