[SaltyPuglord] needed a solid state relay for a project. We’d have just bought one, but he decided to design his own in LTSpice.Along the way he made the video below, which is pretty informative ...

When the power is disconnected the slug moves outside and locks the door. It doesn’t use any power in a locked state. To drive the solenoid lock you would need a power source that can give 12V @ 500mA ...

Sometimes you want your micro controller to control AC powered devices like lamps, fans or other household devices. But because the micro controller operates at 5 volts, it cannot directly control ...

The Antenna's length was calculated with this formula: Lambda = (V/f) (V = speed in the ether, f = wavelength) all divided by 4. This project provides a basic web interface (luce.html), to toggle the ...

The 24 lights are divided into ten sections; each of these has its own solid-state relay circuit built around an MC3042 as the opto-coupler, with a power supply he made from a scrap transformer.