PIR Infrared Motion Sensor (HC-SR501)
In stock, ships same business day if ordered before 2PM
Delivered by Mon, 25th of Nov
Quantity Discounts:
- 5-15 $1.43 (exc GST)
- 15+ $1.38 (exc GST)
Recommended Essentials:
PIR sensors often referred to as, "Passive Infrared" or "IR motion" sensors, enable you to sense motion. Everything emits a small amount of infrared radiation (IR), and the hotter something is, the more radiation it emits. PIR sensors are able to detect a change in average IR levels of their detection zone (e.g. when a human enters a room, that room will increase in temperature slightly) and hence sense motion.
This one's great, as it can be powered via the Raspberry Pi's 5V output, and be read directly from the Raspberry Pi's GPIO input (as the sensor has a digital 3.3V output!)
This PIR includes an adjustable delay before firing (approx 0.5 - 200 seconds), has adjustable sensitivity and two M2 mounting holes! It runs on 4.5V-20V power (or 3V by bypassing the regulator with a bit of soldering) and has a digital signal output (3.3V) high, 0V low. Its sensing range is up to 7 meters in a 100-degree cone.
The operating mode of the PIR sensor can be changed by bridging the solder pads on the back of the board, by bridging the centre and L pad, single trigger mode will be selected, meaning that the sensor will only output one single when triggered. By bridging the centre and H pad, multi trigger mode will be enabled meaning that the sensor will continue to output signals while an IR presence is detected.
Features
- Input Voltage: 4.5V - 20V
- Current Draw: <50µA
- Digital Output: 3.3V (High)
- Digital Output: 0V (Low)
- Working Temperature: -15°C to 70°C
- Delay Time: 0.5 - 200 Seconds
- Sensing Angle: 100° Cone
- Range 5m - 7m
- Dimensions
- Sensor Lens Diameter: 23mm
- Length: 24.03mm
- Width: 32.34mm
- Height (with lens): 24.66mm
- Centre screw hole distance: 28mm
- Screw hole diameter: 2mm (M2)
Examples
Raspberry Pi Pico - Micropython
from utime import sleep
import machine
onboard_led = machine.Pin(25, machine.Pin.OUT)
button = machine.Pin(3, machine.Pin.IN, machine.Pin.PULL_UP)
while True:
if button.value() == 0:
onboard_led.on()
else:
onboard_led.off()
sleep(0.1)
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- $7+ for Standard Post (typically 6+ business days, tracked)
- $11+ for Express Post (typically 2+ business days, tracked)
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Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.
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International Orders - the following rates are for New Zealand and will vary for other countries:
- $12+ for Pack and Track (3+ days, tracked)
- $16+ for Express International (2-5 days, tracked)
If you order lots of gear, the postage amount will increase based on the weight of your order.
Our physical address (here's a PDF which includes other key business details):
Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia
Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.
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