I have to do a project where with an ultrasonic sensor HC-SR04 detects a person and activates relays (connected to lights) with some delays decided by me. The sensor's range of action is editable by a potentiometer. I have no idea which way to start could you give me a hand?

hc-sr04

Kolonna April 6, 2018, 1:25pm 3

i didn't find nothing that correspond to my project

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