This article shows you how to build a circuit that automatically turns things on and off depending on how light it is outside. You only need a few parts: a special switch called a triac, a light sensor LDR and a resistor and capacitor. This circuit can be used to turn on lamps at night […]
LDR Circuits
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Flashlight Activated Remote Control Circuit
This post shows you how to build a remote control circuit you can turn on with a flashlight. It uses a light sensor made with a transistor and a special light detector LDR to pick up the light from the flashlight. We will show you how to build it and how it works step by […]
Simple Automatic Day Night Switch Circuit
Saving electricity is important especially in cities where there is not enough to go around anymore. This article shows you how to build a simple automatic light switch that turns things on, and off depending on how light or dark it is outside. This can help you save money on your electric bill. What is […]
Automatic Street Light Circuit using LDR
In this post we learn how to build an automatic street light circuit using LDR and relay. Introduction: Saving energy is important, so lots of places are using special street lights with LEDs that turn on by themselves! These lights sense darkness using a light sensor called an LDR, which helps save power. This article […]