Here’s a simple project ... detecting circuit with 2 yellow LEDs based on this Evil Mad Scientist Laboratories design. After successfully building the circuit, we took the project one step ...

I'm very glad you asked,because that means we can talk about something very helpful - circuits.A circuit is a closed loop that electricity can flow around.Let's start by building a simple circuit ...

[Keystone Science] recently posted a video about building a theremin — you know, the instrument that makes those strange whistles when you move your hands around it. The circuit is pretty simple ...