A friend recently sent me an email noting that the classic 2N3904 bipolar transistor was now 60 years old. Since its “birth” ...

Since the early 1990s, transistors — the tiny switches that drive everything from smartphones to supercomputers — have ...

This project is a basic flip-flop (astable multivibrator) circuit that alternately blinks two LEDs using two NPN transistors, capacitors, and resistors. The circuit uses capacitor charging/discharging ...

This is a simple LED driver circuit using two 555s and a pair of NPN/PNP transistors to drive several LEDs meant to outline a small sign. Designed with my son for a St Patrick's Day project, in KiCAD.

Never miss a blown fuse again! This ultra-simple four-component circuit ensures you’re instantly alerted when a mains fuse fails, using an active flashing LED — no complex measuring needed, just smart ...

During my visit, a postdoc showed me a transistor ... circuits, wearable alone or under football or hockey helmets, that alerts players to potentially concussive head impacts with a set of ...

If you listen to music at a high volume, your AirPods may die too fast as a result of using more power. If AirPods batteries become too low, their built-in transistor can’t amplify sounds ...

A 9V battery powers the circuit for convenient operation. Lightweight and portable, the stick enhances mobility by providing real-time feedback on surroundings. It integrates an IR sensor module, a ...

President Trump delivers remarks following his meeting with Canadian Prime Minister Mark Carney.