This is a very simple touch sensor switch that is build with the 555 timer IC. You just need to touch the metal plate and the relay gets ... The relay is a 12 V DC relay operating at currents less ...

It’s an excellent way to learn about both PWM motor control and the use of 555 timers, all with a very low parts cost and readily available components. We’ve seen such setups before, used as ...

IC 1 is a low-power—1 mW—timer configured as a monostable monovibrator. Zener diode D 1 and filter capacitor C 1, activated by pulses from the voltage divider R 1 /R 2, form a dc supply for the ...

The linked 555 article makes sense if you read it, but a normal NPN circuit to drive the relay only takes 1mA… easy for most uC’s. Then it starts talking about active low input, and how CMOS ...