This year’s Halloween project is a useless machine built with 555 timers. It’s a coffin with a switch. When you flip it off, a dark force rises from the coffin and flips it back on.
Controlling a Servo with 555 Timers
The idea for this project came after we published the simple 555 PWM circuit that controls a DC motor using a PWM signal created by a 555 Timer. I started thinking about the idea of controlling a servo instead.
After some experimentation, I realized that the frequency changed too much when I changed the duty cycle. So my servo would only move at random times.