10 Channel Capacitive Touch Switch Circuit

In this article we are going to construct a capacitive touch switch circuit with 10 channel output, the state of the each channel can be turned ON and OFF sequentially by touching acoin sized metal plate. Capacitive touch is very commonly used in our smartphones, tablets or any gadgets which have touch screen. The term […]

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Programmable Musical Organ Circuit

In this post we are going to construct a musical organ circuit whose musical tone can be programmed by adjusting 10 pre-sent resistors in the circuit and the speed of the music played can also be controlled. The proposed circuit is based on IC 555 and IC 4017; it has two IC 555s and one […]

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Simple LED Stopwatch Using IC 555 and IC 4017

In this post we are going to construct a simple LED stopwatch using IC 555 timer and IC 4017 decade counter. The elapsed time is indicated by LEDs which illuminates in a sequence. Stopwatch is very important piece of equipment in sports, cooking, laboratory, medical etc. They are used to measure short period of time […]

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Simple Variable Power Supply Circuit for Benchwork

In case you assess the cost and the rating of this simple variable bench power supply you may receive a big surprise, as the output voltage and current tend to be totally variable between 0. . . 18 V and 0 . . . 1.8 A correspondingly and expenses have yet been maintained affordable. Referring […]

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Simple Electric Fencing Circuit

In this post we are going to make a simple electric fencing circuit which can protect your private property from animals and intruders and prevent them from gaining access. Note: Please precede this project only after obtaining proper permission from your local government. Intruders are everywhere and you have no idea when they will attack […]

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Solid State Relay (SSR) Circuit Using Triac

A solid state relay (SSR) circuit using in built zero crossing detector is explained in this post. The circuit is extremely simple to implement and make nevertheless offers with valuable capabilities such as clean switching, devoid of RF disturbances, and in a position to deal with loads as much as 500 watts. We have found […]

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LED Amplifier Circuit

The light emission of an LED is usually fairly small. In case a lot more brightness is needed, the following LED amplifier circuit might help. The LED to be amplified’ is actually substituted by an LED in an opto-coupler that clicks a lamp (for instance, a signal lamp) attached to the mains supply. Once the […]

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  Simple 12V DC Fan Speed Controller Using IC 555

In this post we are going to construct a circuit to control the speed of 12V DC fan which is commercially available to run on 12V Solar panels and Batteries. The utilization of DC fan become common where access to electricity is not established the area or where power cuts are pretty common or even […]

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Non-Contact Voltage Detector Circuits Using Transistors and IC

In this post we are going to discuss a few non-contact voltage detector/tester circuits for checking the presence of active mains live wire. We will be understanding what non-contact voltage detector is, how it functions and how to make one using transistors and ICs. What is non-contact voltage detector? Non-contact voltage detectors are AC mains […]

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Road Diversion Warning Indicator using Running LED Lights

The discussed LED lamp chaser circuit can be effectively used for indicating or warning road diversions or when a roadwork is in progress, especially in areas where street lamps are absent and in accident prone dark roadways. Roadworks and highways are usually marked during the hours of darkness by yellow flashing lights. These may often […]

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