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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StemeduHC-SR501 PIR Sensor Infrared IR Body Motion Module for Arduino Raspberry Pi(Pack of 5pcs)

StemeduHC-SR501 PIR Sensor Infrared IR Body Motion Module for Arduino Raspberry Pi(Pack of 5pcs)

Product ID: 350899607

Details

Brand
Stemedu
Colour
Multi
Item Weight
60 Grams
Maximum Range
21 Feet
Power Source
Corded

📏21 ft max detection range

🔌Corded electric power source

🧩Compatible with Arduino & Raspberry Pi

AR$17064

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Description

🚀 Elevate your smart projects with motion that moves you!

BULK PACK ADVANTAGE - Includes 5 sensors to scale your projects or security setups effortlessly.
COMPACT LIGHTWEIGHT - Only 60 grams with a sleek 20x8x15 cm design for easy wall mounting.
RELIABLE POWER SUPPLY - Corded electric source ensures uninterrupted performance without battery hassles.
PLUG PLAY INTEGRATION - Seamlessly connects with Arduino, Raspberry Pi, and home automation systems.
PRECISION MOTION DETECTION - Detects movement up to 21 feet for flawless automation and security.

The Stemedu HC-SR501 PIR Sensor is a high-precision infrared motion detection module designed for Arduino, Raspberry Pi, and home automation systems. With a maximum detection range of 21 feet, corded power supply, and compact design, this pack of 5 sensors offers reliable, scalable solutions for security and automation enthusiasts.

Specifications

ASIN	B07KBWVJMP
Best Sellers Rank	#432,423 in Home Improvement ( See Top 100 in Home Improvement ) #649 in Motion Detectors
Brand	Stemedu
Built-In Media	1N Motion Sensor
Colour	Multi
Compatible Devices	Arduino, Raspberry Pi, Home Automation Systems, Security Systems
Customer Reviews	4.4 4.4 out of 5 stars (339)
Importer Contact Information	Robocraze Banglore 9711444860
Item Dimensions D x W x H	20D x 8W x 15H Centimeters
Item Type Name	Motion Sensor
Item Weight	60 Grams
Manufacturer	Robocraze Banglore 9711444860, Stemedu
Manufacturer Contact Information	Robocraze Banglore 9711444860
Maximum Range	21 Feet
Mfr Part Number	ST0057X5
Model Number	3216550596
Mounting Type	Wall Mount
Number of Items	1
Number of Packs	1
Packer Contact Information	Storescent India New Delhi 9711444860
Power Source	Corded Electric
UPC	747356632386

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AR$17064

Duties & taxes included

In stock

Sold byAmazon ArgentinaDelivered 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 Argentina.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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