At my age you have to get up at night and tend to be tired on the way to the bathroom. Use a PIR-Sensor to trigger the light on!
Project showcase by Ingo Lohs
As the title says, this is a pretty simple PIR motion controlled relay using an Arduino Nano.
Project tutorial by HeathenHacks
This is my 4th tutorial on how to drive a RELAY (not a relay module) with an Arduino.
How to control several roller shutters with inexpensive relay boards (not ruining them) with physical buttons and remotely simultaneously.
Project tutorial by
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