Category: Test-Measurement

Mains Voltage Monitor

i need a circuit design to detect generator voltage and display with LED for certain value of voltage. for example red LED”s (more…)

This a part of a complete Benchtop DMM that you can build to learn the internals of a Digital MultiMeter. This is (more…)

U1A LF353 opamp turns on a buzzer when the voltage at Test + falls very low indicating a short between Test + (more…)

I would like to improve that circuit of a single digit voltmeter, I want to make it measure voltage from -9 V (more…)

Here is a current source you can build for resistance measurement. When the current is held constant, you know as per Ohm’s (more…)

Measurement of resistor values in circuit configurations are required to be made often, as these might have changed in value due to (more…)