Building a remote control circuit that can be switched ON with a flashlight is explained in this tutorial. It uses a light sensor which is constructed using a transistor and a specially designed light detector LDR to receive light from the flashlight. The article provides detailed instructions on how to build a flashlight activated remote […]
Infrared (IR) Sensor Alarm Circuit using TSOP1738
This tutorial teaches how to construct a simple alarm system that detects intruders using invisible light beams. Because it uses infrared light this kind of alarm is known as an IR alarm. It generates an infrared light beam that travels across a room using an special chip known as an IC 555. The light is […]
Simple Infrared (IR) Intruder Alarm Circuit
This article explains how one can design an innovative alarm system that detects possible attackers passing through a invisible light beams. The circuit consists of two components: a transmitter and a receiver. The circuits transmitter puts out an infrared light beam across the room. When someone passes by a light source an LED alerts with […]
Simple Transformerless Power Supply Circuit
The article describes how to create a circuit for a small power supply that transforms high voltage wall socket electricity into lower voltage electronic supplies. Without using a larger transformer the design does this in an innovative manner. WARNING: Building circuits with high voltage can be dangerous. Only do this while an adult is watching. […]
Automatic Dimmer Dipper Circuit for Automobiles
An electronic device called an Automatic Dimmer Dipper Circuit are made for vehicles and are used to automatically change a headlights brightness depending on whether there is oncoming traffic. Since vehicles brightness can immediately blind other drivers while driving at night but the main objective is to improve road safety. When the road becomes clear […]
Simple Bench Power Supply Circuit
This circuit is a simple bench power supply that is both easy to use and efficient with adjustable voltage and current monitoring. What is a Bench Power Supply: A bench power supply circuit is a handy device that provides a steady and regulated source of electrical power for use in workshops, labs and electronics testing. Its […]