100+ Best Electronics Mini Projects for School College Students

We would like to provide you with a huge list of Electronics Mini Project ideas for your engineering project work, along with the components list, circuit diagram, code, working principle, and applications. This list has a combination of our own making DIY projects and a few other projects done by some other websites.

Motion Sensitive Automatic Light Using 4017 & IR Sensor

In this project, we are going to build a motion-sensitive automatic light using 4017 and an IR sensor. When somebody attempts to cross the sensor, the light will automatically turn on and it will glow consistently. And after coming back to the sensor range, it will automatically turn off.

PWM Motor Speed Controller Using 555 Timer

Today’s project is about PWM Motor Speed Controller using just 555 timer IC. It is useful for varying the speed of a low-powered DC motor. There are many circuits on the web that can control DC motors for electronic project purposes. But when it comes to controlling the motor uniformly and smoothly, the PWM motor speed controller is the best option like using AVR, 8051 and Arduino.

How To Build 12V DC To 220V AC 35W Inverter Circuit

In this tutorial, we will be going to learn how to build a simple 12V to 220V 35W inverter circuit. Inverters are often needed at places where load shedding is a common problem. There are two types of inverters, sine wave inverter which is very expensive, and modified inverters which price are inexpensive.

Voltage Doubler Circuit Using 555 Timer IC

A voltage doubler circuit is an electronic circuit that charges capacitors through input voltage and switches these charges twice the voltage produced at the output as at its input.

Automatic Plant Irrigation System Using NE555 Timer

Nowadays, watering crops are a normal problem in the agriculture field. It is happening because farmers lack ideas about the availability of technologies. They lose their precious time pumping water to spread the entire field until it gets properly watered. So we here designed an automatic plant irrigation system using 555 timer ic.

1.2V-12V Variable Automatic Battery Charger Using Relay

In this project, I will be going to show you a 1.2V to 12V variable auto-cut-off battery charger using a relay. When the battery level is below the maximum threshold voltage level, the charger starts to charge. When it gets its maximum voltage which is set, then the variable battery charger circuit will automatically cut the charging from the battery.

IR (InfraRed) Proximity Sensor / Obstacle Detector Circuit Using LM358

An infrared proximity sensor by utilizing IC LM358 with a simple step-by-step process. The activity of this sensor is so basic when an object is before the sensor, the alarm or LED will glow up. We have two IR LEDs, a transmitter and a receiver.

Simple Fire Alarm Circuit

This mini-project demonstrates a fire alarm circuit that detects nearby fire in a small radius and the sensor activates the op-amp LM358 to produce the output Sound through a buzzer. 

LED Chaser Using 555 Timer & 4017 Counter

This mini-project demonstrates a led chaser circuit can be made using 555 timers and CD4017 IC with some simple steps. This mini-project can be used in blinking lighting, chaser lighting, and many decorative items.

Ultrasonic Sound Generator Using 555 Timer

A simple Ultrasonic Sound Generator that can be used for various purposes such as a sound generator, mosquito repeller, and like this. This project uses an astable mode multivibrator with IC 555 which produces the desired frequency by altering the variable resistance.

Simple Burglar Security Alarm Circuit

We can use a burglar alarm system in residential buildings, commercial buildings, offices, industries, and military bases. In most cases, these security systems are too much costly but this inexpensive project can overcome such problems.

How To Make A Metal Detector Circuit

This mini-project demonstrates a simple metal detector circuit that is very useful for checking the person in shopping malls, hotels, and cinema halls to ensure that person is not carrying any explosive metals or illegal things like guns, bombs, etc.

Darkness Detector Circuit Using 555 Timer

This mini-project demonstrates a darkness detector that detects darkness using the cheapest light sensor that is LDR (Light Dependent Resistor). The darkness Detector circuit can helpful for use in applications where the light will be going off. 

Low-Cost Audio Amplifier Using LM386

This mini-project demonstrates a low-power audio frequency amplifier that is helpful in a small audio amplifier project. The IC consumes very little power and a 9V battery can operate it easily. It can easily drive an 8 Ω speaker or two 4 Ω speakers.

Simple Mobile Phone Detector Using LM358

This mini-project demonstrates a cell phone detector that can detect the nearness of an active cell phone from a separate distance of four to five meters. So it can come helpful in an assessment lobby or gatherings.

Smoke Detector Alarm Using LM358

A Smoke detector is a smoke-detecting gadget that shows fire. Smoke alarms are exceptionally normal in homes, workplaces, schools, and industries. Smoke alarms are extremely helpful gadgets as the harm brought about by fire mishaps is disastrous.

Water Level Indicator Alarm With Transistor & 555 Timer IC

Water tank flow is a typical issue that prompts the wastage of water. In spite of the fact that there are numerous answers for it like ball valves which consequently stop the water stream once the tank gets full.

Rain Alarm Circuit Using Two Transistors

This is very useful for home use because it alerts us whenever the rainwater falls on the two probes which will turn on and the buzzer will start to beep.

Ding Dong Doorbell Circuit Using 555 Timer

Doorbells are basic in each house. We, every day watch various sorts of doorbells accessible in the market and they produce various kinds of music relying upon their usefulness.

DC to DC Boost Converter Circuit

This mini-project demonstrates a simple and modest DC-to-DC boost converter circuit with 555 Timer IC. A boost converter is a DC to DC power converter that increases the voltage to a fixed certain level by getting a certain amount of specified input voltage.

Water Level Alarm Using 555 Timer

This is a simple and low-cost hardware project using a 555-timer circuit. The aim of this mini project is to design a water level detecting alarm with simple and low-cost hardware without compromising on the performance of the device

555 Timer IC Testing Circuit Working Principle

The 555 Timer IC is one of the most popular and most frequently used integrated circuits in mini-project. It performs an array of timing tasks in the electronic circuits and there is a huge list of experiments which can be performed with 555 IC.