High-Gain Current Sensor

  
A high-gain amplifier using a UA741 is used to sense relative voltage drop in a conductor, and therefore current i
High-Gain Current Sensor - schematic

n the conductor. i2 can be increased to 10 for increased sensitivity. LED1 and LED2 provide polarity indication. This circuit can be used to detect current flowing in a PC board trace, and also for locating shorts and opens.




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