Quick Start Best Practices - Connecting a relay using isolation - optocoupler - 2 Relay Board Module
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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Robin
Sun 2018.08.05
Thanks to @allObjects
Optocoupler
http://forum.espruino.com/conversations/323745/#comment14353247
2 Relay Board Module
http://forum.espruino.com/conversations/323745/#comment14355234
SainSmart 2-Channel Relay Module