--- product_id: 97026817 title: "HC-SR501 PIR Infrared Sensor" brand: "stemedu" price: "$32.48" currency: USD in_stock: true reviews_count: 13 url: https://www.desertcart.ec/products/97026817-hc-sr501-pir-infrared-sensor store_origin: EC region: Ecuador --- # 0.5-200s adjustable delay 4.5-20V wide voltage range 100° detection cone angle HC-SR501 PIR Infrared Sensor **Brand:** stemedu **Price:** $32.48 **Availability:** ✅ In Stock ## Summary > 🚀 Elevate your smart home game with instant, precise motion sensing! ## Quick Answers - **What is this?** HC-SR501 PIR Infrared Sensor by stemedu - **How much does it cost?** $32.48 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/97026817-hc-sr501-pir-infrared-sensor) ## Best For - stemedu enthusiasts ## Why This Product - Trusted stemedu brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **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. ## Overview 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. ## Description This PIR motion sensor can automatically and quickly open various types of incandescent, fluorescent lamps, buzzer, automatic doors, electric fans, automatic washing machine and dryer Machines and other devices, it is a high tech products. ## Features - HC-SR501 Delay Time: 0.5-200S (adjustable), the range is (0.xx second to tens of second), the delay time can be adjusted by using the potentiometer on the HC-SR501 motion sensor. - Operating voltage range: DC 4.5-20V; Quiescent Current: <50uA; Trigger: L can not be repeated trigger/H can be repeated trigger (Default repeated trigger) - Automatically and quickly turn on home devices by detected HC-SR501 motion sensor. - HC-SR501 motion sensor is an economic hightech products. It is widely used. - Angle Sensor: <100 ° cone angle Lens size ## Technical Specifications | Specification | Value | |---------------|-------| | Antenna Location | Indoor | | Asin | B07KBWVJMP | | Best Sellers Rank | #72,599 in Electronics (See Top 100 in Electronics) #306 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 (360) 4.4 out of 5 stars | | 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 | ## Product Details - **Brand:** Stemedu - **Color:** Green, White, Yellow - **Item Weight:** 60 Grams - **Maximum Range:** 21 Feet - **Power Source:** Electric ## Images ![HC-SR501 PIR Infrared Sensor - Image 1](https://m.media-amazon.com/images/I/51c4V7w95UL.jpg) ## Questions & Answers **Q: Is there a place to add photo resistor in the board?** A: 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. **Q: Is this affected by heat? i have an am312 that throws false positives when my hvac turns on.** A: 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. **Q: What does it need to be powered up? like 5v 12v or ac voltage.** A: Hello, the operating voltage range of this HC-SR501 motion sensor is DC 4.5-20V **Q: What is the spacing on the 3 header pins? (Ground, Signal, Power)** A: It is 2.54mm pitch on the 3 header pins. Thanks ## Customer Reviews ### ⭐⭐⭐⭐⭐ Halloween animatronics *by on Reviewed in the United States January 4, 2024* After a couple of decades, I decided to build some new life size figures using some of the latest sensors, relays, and motors. I'm using the HC-SR501 sensors to initiate the animatronics, and found a couple of issues. They work w/o issue, and will continue their use. I also wanted to incorporate a flame bulb that will go in the medieval torch I built out of PVC pipe/fittings, EVA foam, and modelling paste.Regardless of the input voltage, the HC-SR501 output trigger voltage is only 3.3V-3.4V DC. This means I can only use 5V DC opto-relays, instead of 12V opto-relays as their trigger voltage is >4.5V DC. This required making a 5V circuit to power the HC-SR501 and the relays. The video shows the DC-DC Buck converters (blue LEDs) and the 5V DC opto-relays (red LEDs) driving the HC-SR501, one motor, and the flame bulb. The simplified schematic shows the wiring layout I made with applied voltages.The second issue to note with the HC-SR501 is the delay pot. It only takes a 10 degree turn of the pot to go from the minimum delay time of one second to 25 seconds.Their sensitivity is very good. I have yet to try adding a thermistor to the HC-SR501 to test its night time capabilities.FYI: I'm using the B0CMXCZX9Y nylon standoffs (via Amazon) to mount all of these boards.UPDATE: I'm holding back from installing a thermistor. Low light sensitivity is excellent. ### ⭐⭐⭐⭐⭐ As per the HC-SR501 data sheet, stops detecting as temperature approaches 30 degrees celsius *by on Reviewed in the United States July 28, 2020* As per the HC-SR501 data sheet, stops detecting ("detection range is shorter") as temperature approaches 30 degrees celsius (approximately 90 degrees fahrenheit). These units have the through-holes to add a thermistor to improve high temperature performance, if one has a thermistor to add.The real test is if starts detecting again when the temperature drops. I plan to drop my score one star for each unit that permanently fails on me.Worked just fine the first three days I had it connected. Easy to set up. Pins fit well into female Dupont wires for prototyping. ### ⭐⭐⭐⭐ Interesting Product with Many Real-World Uses *by on Reviewed in the United States August 10, 2025* I set up 2 different doppler motion sensors using these HR-SC501 PIR sensors, one using an Arduino microprocessor and one without. Both worked as advertised, tho the range and sensitivity with the Arduino was much better. ## Frequently Bought Together - Stemedu 5pcs HC-SR501 PIR Infrared Motion Sensor Human Body IR Movement Detector Sensor Module for Arduino for Raspberry Pi - ELEGOO 120pcs Multicolored Dupont Wire 40pin Male to Female, 40pin Male to Male, 40pin Female to Female Breadboard Jumper Ribbon Cables Kit Compatible with Arduino Projects - AEDIKO 4pcs DC 5V Relay Module 1 Channel Relay Switch Relay Board with Optocoupler Isolation Support High or Low Level Trigger --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ec/products/97026817-hc-sr501-pir-infrared-sensor](https://www.desertcart.ec/products/97026817-hc-sr501-pir-infrared-sensor) --- *Product available on Desertcart Ecuador* *Store origin: EC* *Last updated: 2026-08-17*