The HC-SR501 is a PIR motion detector with an adjustable range that can sense up to 7m. The sensor uses infrared technology and features high sensitivity, ultra-low voltage mode, high reliability, and is ideal for using in battery-operated equipment. This sensor is designed for use in security products, alarm systems, lighting control, industrial automation, toys, etc.
Q. what are the three pins and what must they be attached to?
A. Hi George, thank you for your question. The pin out is in the data sheet, which would be used for connection to the circuit.
Reviews
Very nice piece of kit
Reviewed by: Graham Lowen - 05 May 2021
For the price this is an excellent piece of kit for schools and hobbyists. The first one I bought was severely damaged even the capacitor casing was crushed along with a smashed lens and the pins bent over. I was duly sent a replacement which worked perfectly.
