Electronic is fun to learn, especially if you can learn it by building your own circuits. To help you with that, Circuit Digest provides you with a list of popular Electronic circuits and Electronic projects with well illustrated circuit diagram and detailed explanation for a complete do-it-yourself experience. All projects are tested and verified with a working video for a hassle free learning experience. Whether you are an expert or beginner in electronics, we have something interesting for all of you. Below is our huge collection of 200+ free electronic circuits that you can build today.
The features of digital products are growing enormously, which triggers the frequent usage of smartphones in several applications. Thus, the battery backup time is decreasing. It will be fun to build a Power Bank for a Mobile Phone as a spare charging source for emergency purposes, which is also portable. In this article, we will discover how to make a power bank with…
An Electric Generator is very common and useful electrical machine that was discovered by Michael Faraday in 1832. Since then we have been using these machines in all our power plants to provide electricity for our planet. In this project, we are going to build a simple generator using an electromagnet and a fidget spinner to understand the concept of the generator.…
Just like the craze for Pokémon Go out of nowhere the fidget spinners got popular and it became more of trend to have one of these spinning between your fingers. But lately people (including me) eventually got bored of it and hence in this project let us bring in a new purpose for fidget spinner by building a simple motor using Fidget Spinner. With this circuit you will be…
Door alarm is a very common and useful device for security purpose. They are used to detect whether the Door is open or closed. Often we have seen some door alarm in the refrigerator that produced a different sound when they activate. Door Alarm Projects are very popular among the Electronics students and hobbyists. We have also built many alarms based on various…
Electronic gadgets like Mobile Phones and IPods have made our lives a lot easier. But, all of them suffer from one common drawback of charging them at regular periodic intervals. This becomes a problem when we are traveling or at a place where electricity is not available. Also using renewable energy source is quoted as the next generation fuel for all our electricity…
Whenever we need a constant and specific value of voltage without fluctuation we use voltage regulator IC. They provide a fixed regulated power supply. We have 78XX (7805, 7806, 7812 etc) series voltage regulators for positive power supply and 79XX for negative power supply. But what if need to vary the power supply voltage, so here we have Variable Voltage Regulator IC…
In this project, we are going to make a Headphone/Audio Amplifier by using self-designed PCB. This project is mainly designed for amplifying the audio signal from the headphones but we can also use it for amplifying the subwoofer or speaker output, just by switching few jumpers.
When we use headphones with our audio device like mobile, laptop, FM…
“Eyes sense what mind sees.” Like this LDR (light dependent resistor) sense if there is any light source in its sensing range. It’s true that you can manually switch OFF and ON any light, but sometime human beings shows carelessness which may cause waste of electricity. To overcome this problem, we are going to show you that how to make a Light Detector Circuit (which…
A float charger, also called as maintenance charger or smart charger, is used to charge a lead acid battery to top-up the self-discharge capacity. Self-discharge happens in a battery if not in usage for long time i.e., the terminal voltage begins to decrease. If this float charger is connected to the battery the self-discharged capacity can be topped up which is to full…
In this tutorial, we will show you how to connect a Laser diode in an electronic circuit. In comparison to LED’s light, Laser light is highly concentrated, it’s have smaller and narrower viewing angle. For connecting a laser diode in an electronic circuit we need a Laser diode driver circuit.
Required Components Laser Diode module (650nm, 5mw) LM317 Voltage…
“Automation is good, so long as you know exactly where to put the machine’’, In this tutorial we are making a Temperature controlled DC fan using Thermistor, as it starts above the preset level of temperature and stops when the temperature return to normal condition. This whole process is done automatically. We have previously made the Temperature controlled Fan using…
Here, we are going to show you how to make an LED Roulette Circuit using 555 timer IC, before starting the tutorial let you know about what the roulette is, it’s a casino game named after the French word which means little wheel. As same, here we are making a wheel (or circle) shaped led blinker, using 555 timer IC placed in Astable mode, and IC 4017 which is decade counter…
