The electronic touch switch circuit require few external components ( four transistors and four resistors ) and is very simple do build even for beginners . Very simple electronic touch switch – ...

If you ever work with a circuit that controls a decent amount of current, you will often encounter a FET – a Field-Effect Transistor. Whether you want to control a couple of powerful LEDs, sw… ...

This last principle is used in the sensitive switch installation you will be presented next. Photocell is placed in a bridge circuit and a comparator is used as detector bridge balanced. The ...

A more practical optical transistor debuted in April 2012 at Purdue University in West Lafayette, Indiana, where electrical engineer Minghao Qi has made one that is compatible with the ...

Two lamps connected in series with an open switch and a cell The circuit diagram shows a circuit with two lamps connected in series. If one lamp breaks, the other lamp will not light. The current ...