Here’s a simple project for your Halloween ... Instead of simply replacing the outdated bulb, we decided to build a small dark detecting circuit with 2 yellow LEDs based on this Evil Mad ...

Adding more batteries to a simple circuit will increase the electrical energy, which will make a bulb brighter ... You can use a switch in a circuit to create a gap in a circuit.

A great example is this simple wireless AC current ... The transistor then switches on a second BC547, which lights an LED. The whole circuit is built on top of a battery clip so it can be run ...

The current is different in different parts of a parallel circuit. In most buildings, the lights and sockets are all connected in big circuits but you can switch ... simple circuit is like a one ...

It's a simple string of miniature light bulbs ... Next in line are the LED light bulbs. They're fed into the machine and tested for positive or negative charges. Then, the metal ends of the ...

Even if your electricity is clean, a bad installation could yield the same effects as dirty power. Old, dirty sockets won't ...