Here are 4 simple 12V power supply circuits with output voltages around 12V. First power supply circuit is built with BD139, one zener diode and a few passive components. Each of the schematic is very ...

Circuit Cubes provide a fun and affordable way to teach kids about electricity while bringing their toys to life.

A simple electric circuit learns to classify data in a creative new design that could lead to more energy-efficient machine-learning hardware.

An improved circuit with an optocoupler type TLP621 is shown in Figure 2. Figure 2 A circuit with an optocoupler (TLP621) which generates higher (even) harmonics that can be added to the original ...