The HC-SR505 Mini PIR Motion Sensor Module detects infrared changes from moving people or objects within a range of up to 3 metres and outputs a digital HIGH signal on detection. The mini pir sensor runs on 4.5V to 20V, so it works with battery packs and regulated Arduino power lines equally. Its 10mm lens is small enough to mount inside enclosures with a single drilled hole.
The hc sr505 mini motion sensor has a fixed sensitivity and no adjustable potentiometers, unlike larger PIR modules. That is the key trade-off. A non-obvious detail is that the HC-SR505 enters a retriggering mode by default, so it holds the output HIGH for as long as motion continues, not just a fixed time window.
Students, security hobbyists, and compact device makers use the mini pir motion sensor with Arduino IDE or MicroPython over a single GPIO. StemVolt ships this ready to wire.
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Features:
- Detection range of up to 3 metres covers doorways and small room areas
- Sensor lens diameter of 10mm fits inside compact enclosures with minimal cutout
- Operating temperature of minus 15°C to plus 70°C covers indoor deployment needs
Technical specifications:
| Specification | Details |
|---|---|
| Sensor Type | PIR motion sensor |
| Model | HC-SR505 Mini PIR |
| Detection Range | Up to 3 meters |
| Output Type | Digital HIGH/LOW signal |
| Operating Voltage | 4.5V to 20V DC |
| Operating Temperature | -15°C to +70°C |
| Sensor Lens Diameter | 10mm |
Applications:
- Wearable motion badge lights an LED when the wearer stops moving for safety
- Mini security camera trigger uses mini pir motion sensor to start recording on room entry
- Compact desk lamp controller uses HC-SR505 Mini PIR Motion Sensor Module to switch light on presence detection
Package includes:
- 1 x HC-SR505 Mini PIR Motion Sensor Module
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