Asked by: Fatimatou Muksunov
asked in category: General Last Updated: 7th March, 2020

What is HC sr501?

The HC-SR501 is a PIR (Passive Infrared) motion sensor that is very inexpensive and extremely versatile. The HC-SR501 has a built-in voltage regulator so it can run on anywhere from 4.5 to 20 volts, making it ideal for battery powered applications.

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In respect to this, how do you use HC sr501?

Using the HC-SR501 PIR motion sensor as a standalone unit Simply connect VCC and GND to a battery and a red LED between the output pin and ground. The output voltage is 3.3 V, so I added a 68 Ω current limiting resistor in series with the LED.

Also, how do you set up a PIR sensor? Connect the PIR Vcc pin to the + of your power source. Connect the PIR Output pin to one end of the resistor. Connect the other end of the resistor to the long leg (Anode) of the LED. Connect the short leg of the LED (Cathode) to the − of your power source.

Also to know, what is the output voltage of PIR sensor?

For a D.C. current, the PIR Sensor works from 3.3v to 5v DC and gives a TTL output which is directly given to a micro-controller or to relay through a transistor. The PIR sensor consists of a pyroelectric sensor and a Fresnel lens. This curved lens concentrates infrared radiation toward a detector's sensor.

How do I know if my PIR Sensor is working?

Testing a PIR. Now when the PIR detects motion, the output pin will go "high" to 3.3V and light up the LED! Once you have the breadboard wired up, insert batteries and wait 30-60 seconds for the PIR to 'stabilize'.

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