Build Electronic Circuits Blog

I built a “door opened” notifier.

Need a quick way to draw circuits or connection diagrams?

Build a compact FM transmitter to experiment with RF circuits.

This tutorial will guide you through building a simple remote-controlled on-off switch that will work with most IR remote controls.

This tutorial will guide you through building a basic USB-powered light with five Light-Emitting Diodes (LEDs).

An optocoupler (or opto-isolator) is a component that transfer signals between circuits using light.

Here’s a cool Arduino project I did to bring a bit of high-tech magic to my daughter’s toy kitchen.

A microcontroller does not know what to do by itself.

A Solid-state relay (SSR) is an electronic switch without moving parts that use semiconductor technology to turn things on and off.

Need to draw a circuit that looks good, quickly?