Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | HC-SR501 |
| Operating Voltage | DC 4.5V - 20V |
| Detection Angle | < 100 degrees cone angle |
| Detection Distance | 3 to 7 meters (adjustable) |
| Delay Time | 5 seconds to 5 minutes (adjustable) |
| Trigger Mode | L (Low) and H (High) selectable |
| Output Signal | 3.3V High level / 0V Low level |
| Dimensions | 32mm x 24mm |
| Working Temperature | -15°C to +70°C |
| Package Includes | 1x HC-SR501 Module, 1x Pin Header |
Anonymous
Mar 23, 2026
Rating: 5/5
Low power consumption
Using this in a battery-powered project and the current draw is impressively low when idle. The delay time adjustment allows me to keep the light on just long enough without wasting energy.
Anonymous
Mar 21, 2026
Rating: 5/5
Reliable and sensitive
I bought five of these for a home security prototype. All of them functioned immediately out of the box. The detection angle is wide enough to cover a standard doorway without issues.
Anonymous
Mar 20, 2026
Rating: 5/5
Perfect for Arduino projects
This sensor works flawlessly with my Arduino Uno. The sensitivity adjustment potentiometers are very responsive, allowing me to fine-tune the detection range for my hallway light project. Great value for the price.
Anonymous
Mar 15, 2026
Rating: 5/5
Standard classic module
This is the industry standard HC-SR501. If you need a PIR sensor for prototyping, this is the one to get. Consistent performance across multiple units purchased over the last year.
Anonymous
Mar 11, 2026
Rating: 4/5
Good sensor, needs calibration
The module arrived quickly and looks well-made. It took a minute or two to warm up before it started detecting motion accurately, which is normal for PIR sensors. Once calibrated, it has been reliable.
Anonymous
Mar 05, 2026
Rating: 4/5
Great for beginners
As someone new to electronics, I found this easy to wire up using online tutorials. The only reason for 4 stars is that the documentation included in the package was minimal, but Google helped.
Q: What is the maximum current this output pin can drive?
A: The output is a digital signal intended for microcontrollers. It should not be used to drive high-current loads like motors or relays directly; please use a transistor or relay module for those applications.
Q: Can this module be powered directly by a 5V USB source?
A: Yes, the HC-SR501 operates within a DC 4.5V to 20V range, so a standard 5V USB power supply is perfectly suitable.
Q: What is the difference between L and H trigger modes?
A: In 'H' mode, the output stays high as long as motion is continuously detected. In 'L' mode, once triggered, the output goes high for the set delay time regardless of whether motion continues or stops.
Q: Does this sensor work through glass or plastic covers?
A: PIR sensors can generally detect motion through thin plastic, but thick glass or materials that block infrared radiation may significantly reduce sensitivity or prevent detection entirely.
Q: Is the pin header pre-soldered to the board?
A: No, the module typically comes with a separate 3-pin header strip that you need to solder onto the board yourself for easy breadboard usage.
Commercial 1.8/2.2m Food Warmer Cabinet for Fried Chicken and Burger Shops, French Fry Heating Unit, 1.5m Two-Way Pickup Display Case
$3,573.50
Commercial Electric Heated Stainless Steel Fast Food Serving Counter Soup Warmer Buffet Cart
$842.00
Natural Crystal White Azeztulite Loose Beads with Rainbow Luster for DIY Necklaces, Bracelets, and Jewelry Making
$5.54
Ai Zao Fang Six-Cavity Oval Totem Handmade Soap Silicone Mold - Yields Approx. 115g per Bar
$17.70
Zunjue Wire-Bound 8K Watercolor Notebook 300g Watercolor Sketchbook Loose-Leaf Portable 16K Water-Soluble Colored Pencil Notebook Coil-Bound 32K Medium Coarse Fine Grain 200g Kids Students A4 Watercolor Notebook Plein Air Sketch Drawing Book
$7.65
Yuan Dynasty Calligraphy by Zhao Mengfu - Small Regular Script Diamond Sutra Brush Tracing Long Scroll Copybook, Original Version, Wholesale and Customization Available
$15.00
Kodak Photo Printing Service - High-Definition Prints from Your Phone with Lamination and Album Binding
$12.47
Shenzhen Custom Storefront Signage and Lightbox Installation - Illuminated Letters and Shop Plaques
$50.00
Automotive AC Refrigerant Gauge Set – R134a Pressure Meter with Dual Valve Tool for Home R22/R410 Air Conditioning Systems
$329.00
Complete Collection of Taoist Talisman Art Copybooks - Zhengyi Thirty-Six Generals, Calligraphy Practice Sheets with Stroke Order and Red Tracing, Classic Taoist Calligraphy
$38.00
Marie's Blending Knife Replacement Head Set Sketch Blending Tools Sponge Stumps Paper Stumps for Art Students
$4.25
French Imported Arches Watercolor Paper - Handmade 100% Cotton, 300g-850g, Medium/Rough Grain, Extra-Large Rolls and Sheets (4K, Full, Half, Quarter)
$33.10
Commercial Countertop Food Warmer Display Case - For Fried Chicken, Burgers, Egg Tarts, Pies, Youtiao, and Shaobing
$720.00
Integrated Hospital Wastewater Treatment Unit Underground Integrated Sanitary System Sewage Discharge Unit Eco-Friendly Wastewater
$10,000.00
Double Loop Lifting Chain with Rebar Bottom Hook - Manganese Steel Sling for Heavy Duty Rigging
$29.00
Screw Press Screw Sludge Dewatering Machine Sewage Treatment Equipment Rotary Type
$17,600.00
Imported INA Needle Roller Bearings: 9NA, NA 2940, 4R22, 4924, 4926, 4928, 4930-XL A
$109.00
High-Purity Nitrogen Generator for Reflow Soldering and Wave Soldering - Efficient Energy-Saving Transformer Protection for Electronics Factories
$46,100.00
Baohong Watercolor Paper 300g Wood Pulp Medium Grain A3 Full Sheet, Coarse/ Fine Grain Academy Grade 4K, A2, A1, A4 Artist Paper 2K for Art Students
$3.40
Manyue Handmade Natural Soy Wax and White Beeswax for DIY Low-Temperature Scented Candles – Includes Candle Cups and Jelly Wax
$5.46
Car Tire Stone Removal Tool Hook and Rake for Cleaning Tread Debris
$4.53
Caiyan Blending Sticks for Oil Pastels and Sketching, Dual-Tip Soft Wax Crayon Tools for Art Students, DIY Smudging, Highlighting, and Color Mixing
$8.20
Aizaofang Six-Cavity Leaf Stamp Silicone Mold for DIY Handmade Soap, Approx. 108g per Bar
$16.90
Sea to Summit Outdoor Rafting Waterproof Dry Bag Storage Backpack for Clothes, Large River Waterproof Bag 420D
$83.30
Natural 5A Gold Rutilated Quartz Loose Beads - DIY Crystal Jewelry Making Supplies, Round Single Beads
$2.56
Rubber Cable Raceway and Speed Bump with Movable Cover
$31.44
Manufacturer Shaftless Conveyor Uniform Transport No Backflow Customizable Sizes Two-Year Warranty
$7,455.00
Curved Commercial Steamed Bun Machine - Small Glass Display Cabinet for Convenience Stores, Mantou Warmer, Baozi Steamer, Corn Warmer
$338.00
U-Shaped Rubber Sealing Strip, N-Edge Rubber Strip, Edge Wrapping Strip, Iron Sheet Decorative Strip, Rubber Edge Sealing Strip
$102.00
Rongbaozhai Calligraphy Felt Mat - Creative Printed Desk Pad for Brush Writing and Chinese Painting
$14.20
![[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)
