Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | HC-SR501 |
| Working Voltage | DC 4.5V - 20V |
| Detection Distance | 3 to 7 meters (adjustable) |
| Detection Angle | < 100 degrees cone angle |
| Trigger Mode | L (repeatable) / H (non-repeatable) |
| Output Signal | High level 3.3V / Low level 0V |
| Delay Time | 5s to 300s (adjustable) |
| Blockade Time | 2.5 seconds (default) |
| PCB Dimensions | 32mm x 24mm |
| Operating Temperature | -15°C to +70°C |
Anonymous
Mar 27, 2026
Rating: 5/5
Stable and responsive
I've used these in several robotics applications. The response time is quick, and the output signal is clean. Highly recommend for anyone building automatic door openers or security alarms.
Anonymous
Mar 18, 2026
Rating: 5/5
Perfect for Arduino projects
This sensor works flawlessly with my Arduino Uno. The sensitivity adjustment potentiometer makes it easy to fine-tune the detection range for my hallway light project. Very reliable.
Anonymous
Mar 15, 2026
Rating: 5/5
Bulk buy quality
Purchased ten of these for our workshop. All units tested functional out of the box. Consistent performance across the batch. Excellent component for teaching IoT basics.
Anonymous
Mar 15, 2026
Rating: 4/5
Works as described
As a beginner, I found this module very forgiving. The pins are clearly labeled. My only minor complaint is that the delay time dial is quite sensitive, so small turns make big changes.
Anonymous
Mar 07, 2026
Rating: 4/5
Good value but needs calibration
Great little module for the price. It took a minute to understand the jumper settings for trigger modes, but once configured, it detects motion accurately. Just give it a warm-up time after powering on.
Anonymous
Mar 03, 2026
Rating: 5/5
Easy to integrate
Connected this to a Raspberry Pi GPIO pin without any issues. The documentation online is plentiful, making setup straightforward. It handles false triggers from pets well when adjusted correctly.
Q: Why does the LED stay on constantly after power up?
A: The sensor requires an initial warm-up period of about 30 to 60 seconds after being powered on to calibrate. During this time, the LED may behave erratically or stay on. Wait a minute before testing.
Q: Can this sensor detect motion through glass?
A: No, PIR sensors generally cannot detect infrared radiation through glass effectively as glass blocks IR waves. It is best used with a clear line of sight.
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 upon detection and stays high for the set delay time regardless of continued motion.
Q: Does this module come with a lens cover?
A: Yes, the module typically comes with a white, dome-shaped Fresnel lens cover pre-installed to focus the infrared signals onto the sensor.
Q: Is 5V input safe for this module?
A: Yes, the HC-SR501 operates safely within the DC 4.5V to 20V range, so a standard 5V power supply from a USB source or microcontroller is perfectly suitable.
MOMA Small Ma 4K Wireless Video Transmission System with HDMI and SDI for Filming and Live Streaming
$1,999.00
Youzhao Pai Creative Retro 3D Embossed House Number Plate – Custom Door Signs for Villas, Commercial Spaces, and Homes
$200.00
Tianzheng DZ15LE-100/3N901T 100A Transparent Leakage Circuit Breaker, Molded Case Circuit Breaker 3901T 63A
$278.00
![[Daimai Holds Micro-Needle Hair Transplant Patent] Little Red Cap Hydro Glow | Scalp Hydration and Repair](https://www.gosteppe.com/cache/small/product/270424/legacy-main-ecbdc6ee4688639f4a8ef150.webp)
[Daimai Holds Micro-Needle Hair Transplant Patent] Little Red Cap Hydro Glow | Scalp Hydration and Repair
$880.00
Pelican Rolling Case pelican1560 - Waterproof Shockproof Safety Case for Photography Equipment and Instruments
$1,550.00
Disipulai Hot Air Circulation Vertical Food Warmer Display Cabinet - Adjustable Temperature Countertop Cooked Food Warming Equipment
$2,023.00
Complete Pasteurization Production Line for Pomegranate, Grape, Orange, Apple Juice, and Mare's Milk
$6,048.00
Portable Tire Stone Removal Tool - Essential Handheld Hook for Car Owners
$13.73
Factory Direct Longan 160 Curved Hot Stamping Machine Fully Automatic Hot Foil Printer Pneumatic Heat Press Leather Embossing Machine
$10,000.00
Bean Sprout Germinator Tray, Hydroponic Vegetable Growing Container, Soil-Free Pea Sprouting Pot
$14.06
TOPTOY Crayon Shin-chan Memory Echo Series Blind Box - Anime Figure Collectible Toy and Birthday Gift
$47.20
Natural Lightning Cat's Eye Yellow Tiger Eye Loose Beads, Single Crystal Beads for DIY Bracelets and Accessories
$3.91
Pirelli Tire 235/55R19, Original Equipment for Mercedes-Benz GLC, Genuine Tire Compatible with Audi/Land Rover/etc.
$512.00
Biliansheng Hair Transplant: No-Shave Hairline Restoration, Top Thinning Density Enhancement, Nationwide Chain
$9,999.00
Luru Authentic 15-Note Steel Tongue Drum - Professional Grade for Beginners, Adults, and Children
$500.00
![MOOCAT [Postage Stamp Stub] Hand-Drawn Blank Irregular Wood Pulp Fine-Texture Paper for Cyanotype, OC Signing, and Collage](https://www.gosteppe.com/cache/small/product/270412/legacy-main-3037a70329c5379f7064bc16.webp)
MOOCAT [Postage Stamp Stub] Hand-Drawn Blank Irregular Wood Pulp Fine-Texture Paper for Cyanotype, OC Signing, and Collage
$9.90
Used Car Tires - Sizes 155/165/175/185/195/205/215 for 13/14/15/16 inch Rims
$140.00
Pin Puller Extractor Mechanical Repair Tool Bearing Puller and Locating Pin Extractor
$76.50
Water Brush Pen Set with Large Capacity - Essential Tools for Beginners Using Gouache, Solid Watercolor Paints, and Line Drawing; Perfect for Art Students
$32.00
C9335 Automotive Brake Disc Lathe – Resurfacing, Boring, Grinding & Polishing Machine
$16,005.00
Jaguar Tire Lug Nuts Compatible with XE/XF/XJL/F-TYPE/F-PACE - Wheel Hub Screw Caps for Modification
$118.00
Three-Hook Tire Stone Removal Tool, Wheel Groove Cleaner for Removing Stones from Vehicle Tires
$4.80
Pad Printer Accessories: 4-Inch Blade Clamp, Blade Holder, and Doctor Blade Assembly
$5.40
3M Industrial Scouring Pad 7447C, Metal Rust Removal, Stainless Steel Brushing and Polishing Cloth
$4.00
Qinghe Blazing Rose Series
$1,580.00
Cheddar Cheese Production Line, Front-End Processing and Deep Processing Machinery, Mozzarella Cheese Equipment
$25,480.00
MGQ Konjac Noodle Bubble Cleaning Machine, Fully Automatic Soaking and Lifting Washer
$17,555.40
Industrial Large Meat Grinder Fresh Meat Mince Chopper Fruit Vegetable Crusher Meat Grinding and Mixing Integrated Meat Filling Mixer
$32,030.00
Zhuolide D-302 UV Glue - Invisible Adhesive for Transparent Glass, Metal, Coffee Tables, and Crystal Glass, 250g Large Capacity
$130.00
Hell Training Rock Guitar by Shinichi Kobayashi: Electric Guitar Tutorial for Speed Playing
$106.00
![[Youxin Electronics] GP2Y0E03 Infrared Distance Sensor Module 4-50cm Range](https://www.gosteppe.com/cache/medium/product/74667/legacy-main-4da8cadc5fc82afe91b124e3.webp)
![[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)
