Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | HC-SR501 |
| Operating Voltage | DC 4.5V - 20V |
| Detection Distance | 3 to 7 meters (adjustable) |
| Detection Angle | < 120 degrees cone angle |
| Trigger Mode | L (Low) and H (High) selectable via jumper |
| Delay Time | 5s to 300s (adjustable potentiometer) |
| Blocking Time | 2.5 seconds (default, adjustable) |
| Output Signal | 3.3V High level / 0V Low level |
| Dimensions | 32mm x 24mm |
| Operating Temperature | -15°C to +70°C |
Anonymous
Mar 22, 2026
Rating: 4/5
Good sensor, read the datasheet
Works well once you understand the jumper settings for L and H trigger modes. Initially, I thought it was faulty because the delay wasn't working as expected, but I had the jumper on the wrong setting. Once fixed, it's very reliable.
Anonymous
Mar 20, 2026
Rating: 5/5
Bought 10 for student kits
Purchased a bulk pack for our high school robotics club. All units tested functional out of the box. Students found them easy to integrate into their final projects. Highly recommended for educational use.
Anonymous
Mar 17, 2026
Rating: 5/5
Perfect for Arduino Projects
This sensor works flawlessly with my Arduino Uno. The sensitivity adjustment is very responsive, and I was able to set the detection range exactly how I needed for my hallway light project. Great value for the price.
Anonymous
Mar 14, 2026
Rating: 5/5
Low power consumption
Running this on a battery-powered ESP32 setup. The current draw in standby is minimal, making it ideal for wireless security applications. Detection is instant and accurate.
Anonymous
Mar 01, 2026
Rating: 5/5
Reliable motion detection
Using this to trigger a relay for a porch light. It ignores small pets but picks up human motion consistently. The build quality feels solid for a module at this price point.
Anonymous
Mar 01, 2026
Rating: 4/5
Great learning component
My first time using a PIR sensor. The documentation online is plentiful, which helped me get started quickly. The only reason for 4 stars is that the pins are a bit close together for thick jumper wires, but it works fine with standard headers.
Q: Is this compatible with 5V logic boards like standard Arduino?
A: Yes, the module operates on DC 4.5V-20V, and the output high level is approximately 3.3V, which is sufficient to be read as a HIGH signal by 5V microcontrollers like the Arduino Uno.
Q: How do I adjust the sensitivity?
A: There is a potentiometer labeled 'S' on the board. Turning it clockwise increases the detection distance, while turning it counter-clockwise decreases it. Use a small screwdriver to make adjustments while testing.
Q: What is the difference between L and H trigger modes?
A: In 'H' (High) mode, the output stays high as long as motion is detected continuously. In 'L' (Low) mode, once motion is detected, the output goes high for the set delay time regardless of whether motion continues, effectively ignoring new triggers during that delay period.
Q: Can this sensor detect motion through glass?
A: No, PIR sensors generally cannot detect infrared radiation through glass as standard window glass blocks IR waves. The sensor needs a direct line of sight or an opening to detect motion effectively.
Q: Does this come with a lens cover?
A: The module comes with the standard white Fresnel lens dome pre-installed. This lens focuses the infrared energy onto the sensor element. No additional covers are included or required for standard operation.
Fully Automatic Carbon Steel and Stainless Steel Filter, Self-Cleaning Vertical Filter, Automatic Blowdown Filter
$37,500.00
Sheepskin Rattle for Babies 0-3 Years - Chewable Intangible Cultural Heritage Handmade Toy with Solid Wood and Brass Shaker Stick, Newborn Gift Box
$12.78
Swiss ITI Dental Implant / Korean Imported Dentium Implant Package with Crown - Shanghai Hospital
$3,980.00
Yandi Retainer Storage Case - Double-Layer Drain & Soak Box for Invisible Aligners and Orthodontic Cleaning
$30.50
Leaf-Shaped Template Stamp for Kids - Transparent Silicone DIY Mold with Sponge for Maple Leaf Rubbing and Painting
$4.93
High-Speed Internal Clamping Double Diaphragm Coupling High Torque Servo Motor Leadscrew Module Elastic Coupler
$367.30
Eye-Care Journaling Highlighters for Students - Colorful Markers for Note-Taking and Key Points
$3.02
Natural Stone Abacus Beads with Large Holes 5*10mm White Crystal Rose Crystal Flat Beads Jewelry Accessories Semi-Precious Stones
$1.50
Heavy-Duty Lifting Chain with Shackles at Both Ends - Manganese Steel Hoist for Pipes, Rebar, and Stones
$72.00
Industrial Large Roll Oil-Absorbent Paper, Jumbo Lint-Free Wiping Rolls, Cleaning Paper, Wholesale Industrial Jumbo Rolls
$150.00
5-Inch Flocked Scouring Pad, Stainless Steel Rust Removal and Polishing Disc, Circular Brush Cloth with Backed Flocking for Polishing
$25.00
High-Temperature Fire-Resistant Cotton Incense Burner Mat, Flame-Retardant Pad for Stick Incense Boxes and Aromatherapy Burners, Heat Insulation for Burning Incense
$2.98
80 Pairs Zhuji Ankle Socks, Solid Color All-Season Trendy Student Casual Sports Boat Socks, Disposable Short Socks
$9.14
Smart Toilet Storage Rack for Bathroom, Multi-Tier Floor-Standing Organizer with Waterproof Tissue Holder
$273.00
Yihuashu Calligraphy Felt Mat - Thickened Grid Cloth for Student Practice, Brush Writing Pad
$1.98
![Xiankan Yunshu [Danran] Ceramic Brush Washer - Hand-Painted Elegant Lily Design under Glaze for Calligraphy Supplies](https://www.gosteppe.com/cache/small/product/269142/legacy-main-f8acbab3a83eee11ff108718.webp)
Xiankan Yunshu [Danran] Ceramic Brush Washer - Hand-Painted Elegant Lily Design under Glaze for Calligraphy Supplies
$32.90
Chunfei Grocery Store Commuter Hard Fork Low-Step Mountain Bike for Road, City, Suburb, School, and Outings
$2,224.64
Zhang Xiaofeng 'Fu Lu' Hotpot Inkstone Set – Covered Ceramic Ink Well for Calligraphy and Chinese Painting
$38.00
Invisalign Orthodontic Retainer Case, Portable Storage and Cleaning Box for Aligners and Dentures
$12.30
Natural 7A Lavender Loose Beads Single Round Bead DIY Amethyst Spacer Beads Jewelry Making Semi-Finished Accessories
$0.88
Paint Brush Cleaner - Mini Toilet Style Rinser for Watercolor and Gouache, Art Supply with Circulating Water System
$16.90
Traditional Wooden Rattle Drum with Sheepskin Head for Early Education, Visual Tracking and Hearing Training for Newborn Boys and Girls
$10.80
Car Tire Stone Removal Hook, Stainless Steel Multi-Function Tool for Cleaning Pebbles from Tires
$6.21
Factory Direct Mining Round Link Chains - High Cost-Performance Lifting Chains for Mining Applications
$153.00
Hangzhou Stomatological Hospital Dental Implant Initial Consultation Package – CT Scan, Missing Tooth Exam, and Custom Implant Plan Design
$1.00
Rockschool Acoustic Guitar Method Book (Chinese Edition) – Folk & Rock Guitar Grading Curriculum for Schools
$145.00
Commercial Food Warmer Cabinet, Small Heating Thermostat Display Counter for French Fries, Egg Tarts, Enlarged Chestnuts, and Fried Chicken
$334.00
Natural Green Peridot Crushed Stone, Small Raw Particles for Demagnetizing Energy, Aquarium Landscaping DIY Accessories
$8.50
3M 5-Inch Flocked Abrasive Disc with Hook-and-Loop Backing – Polishing Pad for Angle Grinders, Rust Removal & Cleaning
$3.20
Children DIY Art Rubbing Stick Round Painting Sponge Brush Graffiti Stamp Tool Kindergarten Rubbing Materials
$2.61
![[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set](https://www.gosteppe.com/cache/medium/product/208273/legacy-main-9ec245ebf781f65a434ba854.webp)
