Category: Instrumentation

DMM range and AC-DC mode Logic

This is the third circuit that you will need to build a Simple Benchtop DMM with no Microcontroller. Here the U1D and (more…)

This is a simple charger circuit which will work for a light load like a DMM, the Battery can be a sealed (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…)

This circuit is a Parallel interface between 89C52 of Atmel with 7135 of Intersil. With This circuit you can read analog data (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…)