Build a compact FM transmitter to experiment with RF circuits. With this circuit, you will be able to transmit your voice over short distances using basic components. Building your own FM transmitter is a great way to experiment with electronics and learn more about how radio frequency works. This circuit is perfect for electronics hobbyists
This tutorial will guide you through building a simple remote-controlled on-off switch that will work with most IR remote controls. And you only need four components to build it. It works like this: Every time you push a button on the remote control the signal is received an converted into one long pulse that toggles
This tutorial will guide you through building a basic USB-powered light with five Light-Emitting Diodes (LEDs). You can expand on this and put it into a casing with a switch to create your very own USB flashlight from scratch! This project is great for beginners who want to learn about basic electronics and soldering. Materials
An optocoupler (or opto-isolator) is a component that transfer signals between circuits using light. In this guide, you’ll learn how they work and how you can use one in your own projects. Optocouplers are very useful when you need to isolate different sections of a circuit, for example in power supply circuits to transfer signals
Here’s a cool Arduino project I did to bring a bit of high-tech magic to my daughter’s toy kitchen. She can now turn on the lights in her toy kitchen with a simple wave of her hand! My daughter has been excited about the thought of getting lights in her kitchen. And I was excited
A microcontroller does not know what to do by itself. It’s your job to tell it what you want it to do. Microcontroller programming boils down to three steps: Write your program code At the most basic level, a microcontroller understands only zeroes and ones (binary code). A program is a set of instructions written
A Solid-state relay (SSR) is an electronic switch without moving parts that use semiconductor technology to turn things on and off. In this guide, you’ll learn how they work, what they are used for, and how you can apply them in your circuits. Relays are very important in electronics because you can use them to
Need to draw a circuit that looks good, quickly? Circuit Canvas is a free, web-based tool for drawing schematics and planning how to connect the circuit in real life. It was designed to make it fast and easy to draw good-looking schematics and connection diagrams for electronics. It was made by Øyvind Nydal Dahl, the
Arduino libraries are like cheat sheets for building cool projects. They let you borrow code someone else made, so you don’t have to start from zero but can make your things quickly with your Arduino. Also, because lots of people use them, it’s easier to get help and tips. In this guide, you’ll learn how
In this tutorial, you’ll learn how to create an Arduino PIR Sensor. PIR stands for Passive InfraRed. The PIR sensor is widely used in motion detection applications and this project will show you how to use it to control an LED. When the sensor detects motion, the LED will turn on and the event will
In this tutorial, you will learn how to set up an infrared (IR) receiver with an Arduino UNO. An IR receiver is a module that will help you decode signals from an IR remote control. In this tutorial, we’ve used the TSOP312, but many others will work. The Arduino will process these signals and print
This 555 Timer Police Lights circuit is an interesting electronics project that simulates the alternating flash of police vehicle lights using LEDs.
The circuit uses a 555 timer IC and a CD4017 decade counter to create the flashing effect. By adjusting the frequency of the 555 timer, you can control how quickly the LEDs flash, mimicking the strobe light effect found on emergency vehicles.
A continuity tester is an indispensable tool when working with electronic circuits. This 555 Timer Continuity Tester uses a 555 Timer IC to generate an audible tone when a continuous path (continuity) is detected between the two probes. This tester will work with resistances up to 200 kΩ. Additionally, it has an automatic turn-off feature
Electrical relays are switches that you turn on and off with electrical signals. In this guide, you’ll learn how a relay works and how to use relays in your own electronics projects!
Relays are very important in electronics because you can use them to turn on/off high-power devices like lamps or garage door motors with just a small DC voltage signal.
You can use a microcontroller, such as Arduino, to create the logic for when to turn your lamp on and off, then use an electrical relay to do the switching of the lamp.
This makes it easy to make lights that activate only at night, control your garage door motor with a signal generated by your phone, or control other home appliances.
The 555 Timer Reaction Game is a simple and fun project that tests your reflexes. Using the classic 555 timer IC in conjunction with a CD4026 decade counter with 7-segment output, you can create a game that challenges players to press a button as quickly as possible after a signal starts. Player 1 uses the