Circuits for Hobbyists - a Collection of Schematics to Build

More Circuits:

Create a Color-Changing Lamp With Intel Galileo

In this tutorial, I’ll show you how to create a color-changing lamp with Intel Galileo. You’ll convert from a temperature to a color on an RGB LED. You can also build this project with an Arduino, pretty much the same way. If you’re new to this board, check out how to get started with Intel […]

This Mono Amplifier Circuit is Super Easy To Build

This is the easiest mono amplifier circuit to build, as far as I know. I love it because it is powerful enough to play pretty loud. And it doesn’t need a pre-amp, heat-sink or any weird transistors. All it requires, is a few standard capacitors, a couple of resistors and a potentiometer. It will give […]

Ho, ho ho! 5 Christmas Circuit Ideas

Every Christmas I turn into a child again. I have a hard time falling asleep. I wake up early in the morning to watch cartoons. And I am probably even more curious about the gifts under the tree than my two-year-old nephew. I often get emails asking for project ideas. So I thought I’d share […]

DIY Sous Vide Cooker

This DIY sous vide cooker was made by my friend Markus. He built it for about 1/10 of the price of the commercial cookers. And it made some really good chicken =) A sous vide cooker is a machine for cooking food using a temperature controlled bath. You can take whatever you want to cook […]

Digital Stopwatch Circuit

This digital stopwatch circuit is a circuit I built for testing some 7-segment displays. It consists of four displays that I control using a microcontroller. The microcontroller counts and makes sure the correct LED segments on each display is lit up. Check out the video below to see how I built it.

LDR Circuit Diagram

This LDR circuit diagram shows how you can make a light detector. An LDR or “Light Dependent Resistor” is a resistor where the resistance decreases with the strength of the light. Here is the schematic for the circuit: