Review on 🔌 Enhance Arduino Projects with Channel Module Trigger Optocoupler by Jason Vigil

After a little searching it's actually pretty easy to use. The spec is terrible, but the manufacturer put these relays on a breakout board that allows you to use a HIGH or LOW signal to activate the relay. I'm using mine for a cool project with a temperature controller that turns on a fan or heating element depending on the temperature. Rated for up to 250VAC, they use an infrared optocoupler to isolate the digital control circuitry (lower voltage) from the analog output (higher voltage). Very happy with my purchase as many Revain electronic components are very inconsistent in quality and reliability when sourced from overseas manufacturers. would recommend.