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.
You have seen Automatic Wiper System in luxury cars where Windshield Wiper automatically gets activated when there is Rain or if there is some water on the windshield. Electronic Wiper is very common device that is attached in every car to wipe the water on the windshield during the rain. But generally they are manually operated and we need to switch them ON manually. But…
RF Sensor and IR Sensor are very popular sensors, which are used to transmit and receive the data wirelessly and they have a wide range of applications. We have developed many projects using RF sensor like RF Controlled Robot, Hand Gesture Controlled Robot etc. RF pair consists a Receiver and a transmitter module.
We have also developed…
Infrared sensors are much common in our electronics life. They are used in many real time applications like for opening and closing the gates at Metro Station. Even they are used in our Mobile phone to turn off the display light during the call.
IR sensor is very popular sensor, which is frequently used in many applications in electronics, like it…
Thermostat is formed by summing two Greek terms thermo and statos, thermos means heat and statos means stationary, standing, or fixed. Thermostat is used to control the devices or home appliances according to the temperature, like turn on/off air conditioner, room heaters etc. Common applications of thermostat are to maintain room temperature in centralized heating…
We are going to build a simple Light Sensing circuit or Light Detector using LDR - a resistive light sensor, to control the ON-OFF of the system associated with respect to the intensity of light that falls on it.
Components Required: LDR (Light Dependent Resistor) BC547 Transistor LED Battery 9V DC Potentiometer (5KΩ) Resistor (1KΩ…
Transistors are the semiconductor devices used for switching or amplifying electrical signals. They are highly durable, smaller in size and operates on a low voltage supply. A Transistor is a three terminal device:
Base: This pin used for activating the transistor (minimum 0.7V required to turn ON a Transistor) Collector: Current flow through…
The main usage of the Relay was seen in the history of transmitting and receiving the information, that was called as Morse code where the input signals used to be either 1 or 0, these change in signals were mechanically noted in terms of ON and OFF of a light bulb or a beep sound, it means those pulses of 1s and 0s are converted as mechanical ON and OFF using…
Transistors are made up of semiconductor material which is most commonly used for amplification or switching purpose, although they can also be used for controlling the flow of voltage and current. Not all but most of the electronic devices contain one or more types of transistors. Some of the transistors placed individually or else generally in integrated circuits…
We all face power cuts in our houses or offices some time or another. At those times we generally use Generator or an Inverter. Power generators use petrol or diesel as fuel and they are noisy. We will not be discussing about the power generators here. Here we will be talking about the Inverter. Inverters drive the power from DC power banks, like lead acid battery pack.…
Here's something interesting for the inner romantics and DIY circuit board assemblers among us. Yes, I'm talking to you, my friend; soldering iron in one hand, PCB board in the other, pining to tell your cherished special person how you feel about them, but clueless about how to express yourself. Sure, you could just tell them "I love you" — but words are nearly as…
Latch basically means “to become fixed in a particular state”. In Electronics, Latch Circuit is a circuit which locks its output, when a momentarily input trigger signal is applied, and retains that state, even after the input signal is removed. This State will remain indefinitely until the power is reset or some external signal is applied. Latch circuit is similar like SCR…
We have previously built the Fire Alarm using Thermistor and Fire Alarm System using AVR Microcontroller. Today we are building very simple Temperature Sensor Circuit or Heat Sensor Circuit. This circuit uses very few and basic components which can be easily available, anyone can build it right away. This Heat Sensor is not only simple but also effective; you can try it…
