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

Product ID: 97026817

Details

Brand
Stemedu
Color
Green White
Item Weight
60 g
Maximum Range
21 feet
Power Source
Electric

⏳0.5-200s adjustable delay

⚡4.5-20V wide voltage range

📡100° detection cone angle

7465 Ft

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Description

🚀 Elevate your smart home game with instant, precise motion sensing!

ENERGY EFFICIENT DESIGN - Ultra-low quiescent current (<50µA) ensures minimal power consumption for 24/7 use.
PLUG PLAY INTEGRATION - Easily mounts on walls and integrates with multiple devices to automate your space instantly.
CUSTOMIZABLE DELAY TIMER - Adjust delay from 0.5 to 200 seconds to perfectly sync with your smart home needs.
PRECISION MOTION DETECTION - Detects movement up to 21 feet with a wide 100° sensor angle for seamless automation.
BROAD VOLTAGE COMPATIBILITY - Operates efficiently between 4.5V and 20V, ideal for Arduino and Raspberry Pi projects.

The 5pcs HC-SR501 PIR Infrared Motion Sensor kit offers adjustable delay timing, wide voltage compatibility, and a 100° detection angle, making it a versatile and energy-efficient choice for Arduino and Raspberry Pi enthusiasts aiming to automate lighting, security, and appliances with professional-grade precision.

Specifications

ASIN	B07KBWVJMP
Antenna Location	Indoor
Best Sellers Rank	#33,620 in Electronics ( See Top 100 in Electronics ) #170 in Motion Detectors (Electronics)
Brand	Stemedu
Color	Green, White, Yellow
Compatible Devices	Arduino, Raspberry Pi
Customer Reviews	4.5 4.5 out of 5 stars (359)
Item Weight	60 g
Manufacturer	Stemedu
Maximum Range	21 feet
Mfr Part Number	ST0057X5
Model Number	3216550596
Mounting Type	Wall Mount
Number of Items	5
Operating Temperature	30 °C
Power Source	Electric
Temperature Range	3E+1 °C
UPC	747356632386
Upper Temperature Rating	30 °C

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7465 Ft

Duties & taxes included

In stock

Sold byAmazon HungaryDelivered 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 Hungary.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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