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You are here: Home / Archives for Meters and Testers

Semiconductor Tester Circuit [LED, Transistor, SCR Tester]

Last Updated on January 6, 2023 by Swagatam Leave a Comment

The semiconductor tester circuit explained below performs continuity tests on SCRs, bipolar transistors, and diodes. How the Circuit Works A squarewave oscillator with a frequency of about 350 Hz is produced […]

Filed Under: Meters and Testers

AC Ammeter Circuit for Measuring Current across 220 V Appliances

Last Updated on September 8, 2022 by Swagatam Leave a Comment

In this article we learn how to build a simple AC ammeter circuit which can be used for checking the current consumption of household 220 V or 120 V appliances. […]



Filed Under: Home Electrical Circuits, Meters and Testers

Bicycle Speedometer Circuit

Last Updated on June 3, 2022 by Swagatam 12 Comments

In this article we will learn how to build a simple bicycle speedometer circuit which can be used to measure the speed of the bicycle. What is a Bicycle Speedometer, […]

Filed Under: Fun Projects, Meters and Testers

High Voltage Meter Circuit [for Measuring 10kV]

Last Updated on May 21, 2022 by Swagatam Leave a Comment

In this article we discuss a simple high voltage meter circuit which can be used for measuring extremely high voltages in the order of many 1000s of volts. The circuit […]

Filed Under: Meters and Testers

Light Meter Circuit with LED Bar Graph

Last Updated on May 18, 2022 by Swagatam 10 Comments

In this post we will discuss 3 different light meter circuits for measuring power of light. In the first method we will use only a solar cell and a multimeter, […]

Filed Under: LM3915 IC, Meters and Testers

LED Oscilloscope Circuit

Last Updated on February 23, 2022 by Swagatam 10 Comments

The simple LED oscilloscope circuit explained in this article can be used for analyzing low frequency waveform through a 10 x 10 LED matrix display. Due to the involvement of […]

Filed Under: 4017 IC Circuits, LED and Light Effect, LM3915 IC, Meters and Testers

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