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.
One of the most commonly used sensors in Electronics is IR sensor (Infrared Sensor). IR sensor helps in detecting the heat and the motion of an object. In the infrared spectrum, all the objects emit some form of thermal radiations. These radiations are invisible to a human eye and can only be sensed or detected by an IR sensor. An IR sensor consists of IR Transmitter which…
Multi-way switching is the most common method to be found in the electrical system. It provides user the comfort to turn ON and OFF any electrical appliances from more than one place. The most common use of multi-way switching is for lighting systems and placed in the most common areas of a building like hallways, reception area, kitchen, living room and many other. Multiway…
Snubbers are the energy absorbing circuits used to smooth the voltage spikes caused due to the circuit’s inductance. Sometimes, due to the overcurrent, overvoltage and overheating the component gets fail. So, for the overcurrent protection of the circuit we use fuses at suitable locations and for overheating we use heat sinks or fans.
Snubber…
Previously we have built simple Square Wave Generator circuit, today in this tutorial, we are going to show you how to generate Sine wave using few basic components like transistor, resistor and capacitor. Sine wave is most commonly known as waveform for Alternating Current. In this circuit we will also build that alternating waveform, we can adjust the frequency or reduce…
Previously we have built many types of charger circuits, that incudes Solar mobile Charger, Float charger circuit, 12v Battery charger, Power bank circuit etc. Today we are going to build charger circuit for charging Ni-Cd Battery. The process of charging Nickel cadmium batteries can be done in two ways:
Fast charging Slow chargingThe Fast…
In this tutorial we are going to show you that how to Generate a Low Power Square Wave Using IC 4047, we will also confirm the output using Oscilloscope. In the Astable mode the output waveform of 4047 IC fluctuates between high and low logic levels which is identical to the square wave. It only requires few resistors and capacitors to add externally to generate the square wave. This can…
Most of the schools and offices have intercoms to communicate with people inside a building or a particular campus. These are just like landline phones but, you do not need an operator, the voice received from one end will be directly transferred to the receiver on the other end. In this circuit we are going to build a very Simple Intercom Circuit using which you can…
To get a regulated power supply we use various voltage regulator ICs like 7805, 7812 etc but they all provide fixed value of output. For variable voltage regulation we already covered LM317 voltage regulator circuit. Today we are making Voltage Regulation Circuit using LM723. This is one of the popular IC used for the Voltage regulation.
For this…
Frequency Dividers are the circuits which divide the input frequency by n (any integer number), means if we provide some signal of frequency ‘f’ then the output will be the divided frequency ‘f/n’. Frequency dividers are very useful in analog as well as digital applications. Here we are building the circuit to divide the frequency by 2 or 4.
In this…
Electronics has always been fun to play with, once we learn the very basics of how each component works and how to use them in our circuit it’s fairly easy to design, simulate and fabricate our ideas into a PCB. In this project let’s build a simple fun circuit, analyse it and then fabricate a PCB to improve our learning curve. The concept behind this Lie Detector Circuit is…
Have you ever feel a shock by touching the switch? It does not generally happen but sometimes physical contact with switches may be dangerous. But what if the switch gets wireless and you don’t have to press any button at all for switching on or off your home appliances. So today we are building a Simple Wireless Switch Circuit in which there is no need of physical contact…
In this project, we are going to build a Transistor Based Simple Soil Moisture Detector Circuit. In this circuit, we have used an NPN transistor to detect soil moisture. This is very simple and interesting circuit for electronics lovers. This Soil moisture sensor circuit can be used in many applications like Automatic plant irrigation system, Greenhouse projects etc. If you…
