Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Operating Voltage | DC 4.5V - 20V |
| Static Current | < 60uA |
| Detection Distance | 3 - 7 meters (adjustable) |
| Detection Angle | < 120 degrees cone angle |
| Output Signal | 3.3V TTL High / Low |
| Trigger Mode | H (Repeatable) / L (Unrepeatable) |
| Blockade Time | 2.5 seconds (default) |
| PCB Dimensions | 32mm x 24mm |
| Operating Temperature | -15°C to +70°C |
| Package Contents | 1 x HC-SR501 Sensor Module |
Anonymous
Mar 08, 2026
Rating: 5/5
Reliable component
Bought five for a security system prototype. All arrived working and consistent with each other.
Anonymous
Feb 25, 2026
Rating: 4/5
Good sensitivity
Caught motion well in my hallway. Had to tweak the delay time but otherwise solid performance for the price.
Anonymous
Feb 14, 2026
Rating: 5/5
Great for learning
Used this for my final year project. Documentation online is plentiful which helped me troubleshoot quickly.
Anonymous
Feb 13, 2026
Rating: 4/5
Value for money
Cheap and effective. Just ensure you supply enough voltage or it might not trigger consistently.
Anonymous
Feb 11, 2026
Rating: 5/5
Perfect for Arduino Projects
Works exactly as described. Easy to calibrate sensitivity with the potentiometers. Used it for an automatic light project.
Q: Can I use this directly with a 5V Arduino?
A: Yes, the module operates between 4.5V and 20V, so 5V is perfect for Arduino boards.
Q: Can I adjust the detection range?
A: Yes, there is a potentiometer on the board to adjust sensitivity and detection distance.
Q: Is this suitable for outdoor use?
A: The module itself is not weatherproof. You should house it in a waterproof enclosure for outdoor applications.
Q: Does it work with Raspberry Pi GPIO?
A: Yes, the 3.3V output usually works directly with Raspberry Pi GPIO pins without extra level shifting.
Q: What is the output logic level?
A: The output is 3.3V TTL, which is compatible with most microcontrollers and logic systems.
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