The first thing I ever built without a kit was a 5 V regulated power supply using the old LM309K. That’s a classic linear regulator like a 7805. While they are simple, they waste a lot of energy as ...

Learn how to make a simple electric doorbell at home in this step-by-step tutorial. Using everyday materials like cardboard, a DC motor, battery, metal bowls, a clothespeg switch, and basic wiring, ...

Replacing the traditional wire complexity with Flexible printed circuits provide a unique medium for electric circuits. Flexible Circuit Technologies are produced by photolithographic technology. A ...

Illustrated in this simple project is the creation of an Easy Dub Siren from a Circuit Bent Keychain along with a bunch of components. The parts that would be needed to build the Easy Dub Siren ...

The Proxmark3 PCB 125kHz antenna., GNU GPL version 2, GitHub link. Picture this: It’s the end of the year, and a few hardy souls gather in a hackerspace to enjoy a bit of seasonal food and hang out.

Researchers at Purdue University and the University of Virginia are now able to create “tiny, thin-film electronic circuits peelable from a surface,” the first step in creating an unobtrusive Internet ...

Using simple components such as oil, salt water, lipids and proteins, plus routine genetic engineering techniques, it is possible to create simple nanofluidic ...

Early radio receivers and record players nearly always had a knob marked “tone,” which was usually a crude low-pass filter with some form of severity adjustment. At best, these controls could ...