I made a very simple project that simply increases the light intensity on RGB LED strip if movement is detected and decreasing it if no movement is detected. Everything works fine while I am powering my sensor with arduino UNO, but when I try to connect sensor to external power supply (YwRobot) on …

Sensors with external power supply

blh64 April 14, 2018, 10:35pm 2

Do you have the external power supply ground connected to your sensor ground and also connected to your UNO ground? If not, you will have issues, possibly like this.

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Sensors with external power supply

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