Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | HC-SR501 |
| Sensor Type | Pyroelectric Infrared (PIR) |
| Operating Voltage | DC 4.5V - 20V |
| Detection Distance | Up to 7 meters |
| Detection Angle | < 120 degrees cone angle |
| Trigger Mode | L (Repeatable) / H (Non-repeatable) |
| Delay Time | Adjustable from 5s to 300s |
| Blockade Time | Adjustable from 0.3s to 18s |
| PCB Dimensions | 32mm x 24mm |
| Working Temperature | -15°C to +70°C |
Anonymous
Mar 25, 2026
Rating: 5/5
Reliable and Compact
Bought this for a university robotics project. It's compact, easy to wire, and the documentation online is plentiful. The L/H trigger jumper is a nice feature for different use cases.
Anonymous
Mar 14, 2026
Rating: 5/5
Fast shipping, works as described
Arrived quickly and packaged well. Tested immediately upon arrival; the LED indicator makes debugging very easy. The detection angle covers my entire doorway perfectly.
Anonymous
Mar 13, 2026
Rating: 4/5
Good sensitivity, needs calibration
The module detects motion well, but it took some time to dial in the delay and blockade times to prevent false triggers from my ceiling fan. Once calibrated, it works great for my hallway light project.
Anonymous
Mar 13, 2026
Rating: 4/5
Great for beginners
We use these in our workshop for introductory IoT classes. They are robust enough to handle beginner wiring mistakes and provide consistent results. Only wish the mounting holes were slightly larger.
Anonymous
Mar 12, 2026
Rating: 5/5
Excellent build quality
The PCB looks clean and the soldering points are solid. I've been running this off a 9V battery for weeks without issues. Highly recommended for security alarm prototypes.
Anonymous
Mar 05, 2026
Rating: 5/5
Perfect for Arduino Projects
This sensor works flawlessly with my Arduino Uno. The sensitivity adjustment pots are very responsive, and the detection range is impressive for such a small module. Great value for money.
Q: Is there an external datasheet available for pinout details?
A: Yes, you can find the detailed datasheet and pinout diagram in the 'Documentation' section of the product page or by searching 'HC-SR501 datasheet' online.
Q: What is the difference between L and H trigger modes?
A: In 'L' mode (repeatable), the output stays high as long as motion is detected. In 'H' mode (non-repeatable), the output goes high once motion is detected and stays high for the set delay time regardless of continued motion.
Q: Can this module be powered directly by a 5V USB power bank?
A: Yes, the HC-SR501 operates within a DC 4.5V to 20V range, so a standard 5V USB power source is perfectly suitable.
Q: Does this sensor work through glass or plastic covers?
A: PIR sensors generally cannot detect infrared radiation through thick glass. Thin plastic or specialized Fresnel lens covers designed for PIR are recommended for housing the sensor.
Q: How do I adjust the detection distance?
A: There is a potentiometer labeled 'Distance' on the board. Turn it clockwise to increase sensitivity and range, or counter-clockwise to decrease it.
Safety Self-Locking Lifting Hook with Adjustable Chain for Hoisting and Rigging
$140.00
Thickened Mobile Phone Waterproof Case, Waterproof Box, Sealed Container, Pressure-Resistant Box, EDC Drop-Proof Storage Box for Outdoor Travel
$12.00
Commercial Heated Display Cabinet for Crispy Pork Belly, Roast Chicken, and Cantonese BBQ - Constant Temperature Warmer for Peking Duck
$1,394.00
Mejiang Baohong Watercolor Line Art for Beginners, Coloring Book with Colored Pencils and Markers, Cat Letter Theme
$29.70
Shanghai Huamei Hair Transplant, Solution for Hair Loss, Thinning, and Density Enhancement
$6,750.00
New Direct Sale Nanda Silicone Rubber 704 Battery Fixative Adhesive Panel Light Special Glue Photovoltaic Solar Sealant
$25.85
Yonghe Hair Transplant: Top Scalp Density Enhancement (2000+ Units Fixed Price)
$33,800.00
No-Drill Bathroom Storage Rack – Toilet Paper Organizer for Dorms and Restrooms
$22.16
Premium Metallographic Polishing Cloth – White Short-Pile Velvet for Mirror Finish Grinding by Goral
$35.00
Rock Guitar Hell Training: Electric Guitar Textbook and Tutorial by Shinichi Kobayashi, Beginner to Intermediate Chinese Guitar Book and Sheet Music
$58.69
Aromatherapy Candle Resin Jelly Wax Strawberry Silicone Mold, Large Squishy Handmade Soap DIY Material
$1.90
Liboer Drill-Free Security Camera Mount & Router Shelf – Adhesive-Free Wall Bracket for 360 PTZ Cameras and Sockets
$21.90
City Hunter Theme Song Mr. Chui Saxophone Three-Piece Precise Transcription Service
$16.00
![[Deposit Group 12] New Colors: Hugging Bear Matte Low-Mid Heel Lolita Shoes - Sheep Puff with Bear Buckle](https://www.gosteppe.com/cache/small/product/268946/legacy-main-23070b08b8901297c3f91d93.webp)
[Deposit Group 12] New Colors: Hugging Bear Matte Low-Mid Heel Lolita Shoes - Sheep Puff with Bear Buckle
$38.00
Handcrafted Peach Wood and Brass Baby Rattle - Non-Toxic Paint-Free Teething Toy for Infants
$32.00
Car Tire Stone Removal Hook - Debris Cleaning Tool for Wheels
$6.19
Ceramic Rabbit Egg Holder – Creative Irregular Egg Stand for Breakfast or as a Decorative Gift
$33.82
Toilet Tank Side Shelf Bathroom Storage Rack No-Drill Organizer for Bathroom Essentials
$10.40
No-Drill Over-Toilet Storage Rack for Bathroom Restroom Organizer
$8.90
Artsneak Blending Stump for Oil Pastels, Dual-Tip Sponge Brush Art Student Painting Tool Set, Washable and Crumb-Free
$14.20
75X100 Imitation Inkjet Transfer Steel Plate for Date Coding - Custom Logo and Trademark Available
$38.00
Lint-Free Cloth 1009DLE/SLE - Straight/Net Weave for UV Printhead, Screen, Lens Cleaning, Industrial Wiping Cloth
$10.80
Pirelli PZ4 Tires, Sizes 235/245/255/265/285/40/45/50/55 R19/R20/R21/R22
$350.00
Wooden Plaque Carved Signboard for Business Opening, Antique-Style Shop Entrance Header, Custom Engraved Solid Wood Couplets MWU
$182.96
Kumho ES01 Car Tires: Sizes 155/165/175/185/205 with Aspect Ratios 55/60/69 and Rim Diameters 14/15/16/17
$458.00
Mont Marte Paint Brushes, Creative Children's Painting Brush Set (3 Pieces), Tempera Brush Kit for Kids
$6.50
Baohong Watercolor Paper 300g 8K/4K - Wood Pulp A1/A3/K3 350g Fine/Coarse Grain for Watercolor and Oil Pastels 4K
$4.00
Imported IK7 Linear Bearing LM 162837 203242 254059 304564 3552O0 UU
$96.00
Used Car Tires Auto Salvage Tires 155 165 175 185 195 205 215 1U3 14 15 16
$202.00
Magnetic Charging Stand for MIJIA Smart Audio Glasses (Enjoyment Edition) & Jiehuan AI Glasses – Wireless Installation for Type 86 Box
$84.10
![[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)
