DiscoverCircuits.com, has 28,000+ electronic
circuits, cross-referenced
into 500+ categories. We have searched the web to help you
find quick design ideas.
We make every effort to link to material posted by the designer.
Please let us if you would like us to link to your design.
The contents & graphics of Discovercircuits.com are copyrighted. LINKING to Dave's circuits is permitted
but DO NOT COPY this data to your WEB SITE server.
Click on Drawing Below to view PDF version of Schematic
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
