Hi, I am working on a project where when the PIR detects movement and the ultrasonic sensor reads below a given value it triggers a relay and a media player off a digital output pin. If during the playing of the video the PIR sensor detects no movement it stops the video and releases the relay Cu…

Ultrasonic Sensor & PIR

system May 1, 2014, 8:47am 7

im not sure i understand where the twin would sit as it only needs to read the value once?

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