
Optocoupler / Optoisolator to detect mains electricity on or off
thingiverse
This is a simple box to house an optocoupler and ESP8266 module to detect mains electricity turning on and off. Full details can be found here: https://community.home-assistant.io/t/optocoupler-to-detect-mains-electricity-on-off/281653 Printed with 0.2mm layers
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