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Dave's Circuits
Circuits designed by David Johnson, P.E.

Master Category List - Dave's Circuits
Last Updated on: Monday, April 21, 2008 04:18 AM


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 here.  Published in Popular Electronics, November 1992

Click on Drawing Below to view PDF version of Schematic
See Hobby Project of this Injector

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

Constant Current / Current Sink
Master Schematic Category List - David A. Johnson, P.E.
 

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