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Signal Injectors
Circuits
Last Updated on:
Thursday, April 19, 2012 06:02 AM
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Circuits Designed by Dave Johnson, P.E. : |
- 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.
Published in Popular Electronics,
November 1992
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Signal Injectors
Circuits |
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