For one, the sound doesn’t directly control the solid state relay used in the fan controller. When the microphone equipped Arduino detects enough noise, it will start a timer that keeps the fan ...

In his video guide, [Ben] shows us exactly how to fit a standard solid state relay into a regular outlet box, and easily control it with an Arduino Uno.

Solid state relays (SSRs) are superior to conventional relays in a number of ways, notably in durability, switching speeds, and dependability.

Excel Cell Electronics (ECE) ESR5 series of solid-state relays are available with or without LED Indicators, with ac or dc control inputs, and, separately, with ac or dc-type outputs. “Characteristics ...