MAKERFACTORY MAKERFACTORYM5 Stack Relay Unit

The M5 Stack relay unit can be used as electrically-operated switch may be used. It uses an electro-magnet, in order to press a switch mechanically, there is a large power load circuit wor is required by a separate low power signal to control. As a digital signal that is output by a micro-processor. Up to 30 V DC and 220 V AC. There are 3 pins with the name: ON, OFF, COM. You can program that COM with ON or OFF, simply by a digital GPIO high and low output. This text is machine translated.