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LED Light Circuit for Street Vendors, Hawkers, Shopkeepers

Last Updated on January 9, 2023 by Swagatam Leave a Comment

In this post we will discuss how to build a very simple, low cost LED lamp with charger. This unit can be used by any street seller, vendor, hawker, to […]

Filed Under: LED and Light Effect

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

Blinking LED Circuit using LDR and Resistors

Last Updated on September 10, 2022 by Swagatam 2 Comments

This is perhaps the most simplest looking LED flasher that does not depend on any semiconductor. This LED blinker circuit utilizes ordinary passive components like a few resistors, a capacitor […]

Filed Under: LED and Light Effect, Mini Projects, Oscillator Circuits, Simple Circuits

Light Emitting Diodes (LED) Explained

Last Updated on August 30, 2022 by Swagatam Leave a Comment

The full form of LED is Light Emitting Diode. LEDs are special type of semiconductor diodes which emit light in response to a potential difference applied across their terminals, hence […]

Filed Under: Electronics Tutorial, LED and Light Effect

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

Temperature Controlled Relay Switch Circuit

Last Updated on May 12, 2022 by Swagatam 96 Comments

In this article we discuss a simple temperature controlled relay circuit which can be switched ON/OFF depending on the temperature on its temperature sensor. Meaning, when the temperature on its […]

Filed Under: Heater Controllers, Mini Projects

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