The full-wave diode bridge delivers pulsed-dc voltage to the load, making the circuit suitable for dc-control applications such as dimming. (The circuit can handle ac power if you substitute a triac ...

The 555 timer IC is a handful of active ... used to vary the speed of a computer fan motor. It’s an excellent way to learn about both PWM motor control and the use of 555 timers, all with ...

This is a very simple touch sensor switch that is build with the 555 timer IC ... induced in the human body. The relay is a 12 V DC relay operating at currents less than 200 mA. I love all about ...