Is there a place to add photo resistor in the board?

It's configured with a photo resistor so it doesn't trigger during daylight. In my application I want mine to trigger anytime someone enters the bathroom, so I jumped it out of circuit. If you hold the board with the potentiometers up there is a row of resistors just below them. The one on the right being the photo transistor. The the body is clear, so it can detect light, that makes it easy to spot. It's placement on the opposite side of the board than that of the sensor, kind of makes it worthless.

Is this affected by heat? i have an am312 that throws false positives when my hvac turns on.

Yes, the Passive InfraRed (PIR) sensor detects hot things moving. If your HVAC moves hot air in front of the detector, it should be detected.

What does it need to be powered up? like 5v 12v or ac voltage.

Hello, the operating voltage range of this HC-SR501 motion sensor is DC 4.5-20V

What is the spacing on the 3 header pins? (Ground, Signal, Power)

It is 2.54mm pitch on the 3 header pins. Thanks

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5pcs HC-SR501 PIR Infrared Motion Sensor Human Body IR Movement Detector Sensor Module for Arduino for Raspberry Pi

5pcs HC-SR501 PIR Infrared Motion Sensor Human Body IR Movement Detector Sensor Module for Arduino for Raspberry Pi

Product ID: 97026817

Details

Brand
Stemedu
Color
Green White
Item Weight
60 Grams
Maximum Range
21 Feet
Power Source
Electric

⏳0.5-200s adjustable delay

⚡4.5-20V wide voltage range

📐<100° detection angle

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Description

🚀 Elevate your smart projects with motion sensing that never misses a beat!

WIDE ANGLE DETECTION - Covers a broad <100° cone angle to catch every subtle movement in your space.
ENERGY EFFICIENT DESIGN - Ultra-low quiescent current (<50µA) keeps your projects running longer and greener.
PLUG PLAY INTEGRATION - Effortlessly compatible with Arduino and Raspberry Pi for next-level smart automation.
PRECISION MOTION ACTIVATION - Customize delay from half a second to over 3 minutes for perfect timing.
UNIVERSAL VOLTAGE COMPATIBILITY - Works seamlessly with 4.5V to 20V power sources—ideal for diverse DIY projects.

The Stemedu HC-SR501 PIR Infrared Motion Sensor is a versatile, energy-efficient module designed for Arduino and Raspberry Pi users. Featuring an adjustable delay time from 0.5 to 200 seconds, a wide operating voltage range of 4.5 to 20V, and a detection angle under 100°, it reliably detects human movement to trigger devices. Its low power consumption (<50µA) and easy integration make it a top choice for smart home automation, animatronics, and security projects.

Specifications

ASIN	B07KBWVJMP
Battery Description	battery not included
Best Sellers Rank	#36,714 in Electronics ( See Top 100 in Electronics ) #156 in Motion Detectors (Electronics)
Brand	Stemedu
Color	Green, White, Yellow
Compatible Devices	Arduino, Raspberry Pi
Customer Reviews	4.4 4.4 out of 5 stars (358)
Item Weight	60 Grams
Manufacturer	Stemedu
Maximum Range	21 Feet
Mfr Part Number	ST0057X5
Model Number	3216550596
Mounting Type	Wall Mount
Operating Temperature	30 Degrees Celsius
Power Source	Electric
Temperature Range	3E+1 Degrees Celsius
UPC	747356632386

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€ 17.92

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Slovakia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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