Learn how to build a DIY portable speaker using a car speaker, cardboard, and basic electronic components. This step-by-step project covers soldering a transistor amplifier circuit, wiring a 3.5mm ...

Discover how to build a simple wireless power transfer system at home using readily available components like enameled copper wire, an LED, a 2N2222A transistor, and a 9V battery. This step-by-step ...

You could make a "cat whisker" transistor by using a small piece of Galena, and then poking it with three small conductors until you find the correct conductivity between each conductor to make a ...

Researchers built a four-atom-thick transistor combining an atomically thin semiconductor and molecular crystal. It uses ...