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.
Upon hearing a siren of a nearby police vehicle, one might think about how this tone is being generated. You’ll be surprised to know that the brains behind these tones are not a microcontroller but a humble NE555 timer IC. If you know a little about electronics then you must have heard of 555-timer IC and its 3 very popular circuits the astable multivibrator, the…
If you are a hobbyist or have keen interest in electronics circuits, you must be familiar with 555 timer IC and its three popular circuits - Monostable multivibrator, Astable multivibrator, and Bistable multivibrator. Guess what, we can even use this IC as a switch. This is the type of button that holds its state i.e. on the first press, it switches…
Motion sensor circuits are there on the Internet for quite a while now. These circuits are mainly used to drive AC load (like lights, fans) in home automation or IoT projects. It is also very common in manufacturing industries, like on conveyor belts where the presence/position of a particular object has to be detected.
So, in this tutorial, we are…
The multivibrator circuit is very popular and useful in the field of electronics, and it’s the most basic circuit that you will know about while learning basic electronics. The multivibrator circuit can be divided into two categories: the first one is known as the monostable multivibrator, and the second one is known as the astable multivibrator. But in this project, we will…
A zero-crossing detector circuit is a useful application of an op-amp as a comparator. This electronic circuit precisely identifies when an AC waveform transitions through zero voltage, tracking the changes in the sine waveform from positive to negative or vice versa while it crosses zero voltage. It can also be used as a square wave generator. They have many…
Almost all types of sensors and transducers convert real world parameters like light, temperature, weight etc into voltage values for our electronic systems to understand it. The variation in this voltage level will help us in analyzing/measuring the real world parameters, but in some applications like biomedical sensors this variation is very small (low-level signals) and…
An operational amplifier or Op-amp is one of the most commonly used components in any electronic design. It’s a very versatile device that can be used for a wide variety of applications. In our previous projects, we put the op-amps capabilities to the test by making a ton of projects with it, you can check those out if you want to explore more on the topic. We have also…
Almost every Solar based system has a Battery associated with it which has to be charged from solar energy and then the energy from the battery will be used to drive the loads. There are multiple choices available for charging a lithium battery, we have also built a simple Lithium battery charging circuit previously. But to charge a battery with a solar panel, the most…
In this article, we are going to design a TL494 Boost converter, and calculate and test a high-efficiency boost converter circuit based on the popular TL494 IC, which has a minimum supply voltage of 7V and a maximum of 40V, and as we are using the IRFP250 MOSFET as a switch, this circuit can handle a maximum current of 19Amps, theoretically (Limited by Inductor…
AC LED driver circuits are overly popular due to the advancement of High current white LEDs. We already made a Transformerless LED driver circuit previously, but in that circuit, we used a dedicated LED driver IC like LNK304 to generate 13.6V 150mA of output current to power LEDs. But in this tutorial, we will not use any dedicated driver ICs, but we will make a 2.5 Watt AC…
Most of the power supply these days are very reliable due to advancement in technology and better design preferences, but there is always a chance of failure due to a manufacturing defect or it can be the main switching transistor or the MOSFET going bad. Also, there is a possibility that it may fail due to overvoltage at the input, though protection devices like Metal Oxide…
In the modern world, we use batteries in almost every electronic gadget from your handheld mobile phone, digital thermometer, smartwatch to Electric Vehicles, aeroplanes, satellites, and even Robotic Rovers used on Mars whose battery lasted around 700 sols (Martian days). It is safe to say without the invention of these electrochemical storage devices a.k.a. Batteries, the…
