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Home / Computer Hardware, Monitors & Peripherals / HC-SR501 SR505 Human Body Infrared Induction Electronic Module PIR Sensor Switch SR602

Attributes

Brand -
Category Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin -
Input Voltage DC 4.5V - 20V
Static Current < 50uA (Standby)
Detection Distance 3 - 7 meters (adjustable)
Detection Angle 110 degrees cone angle
Output Signal 3.3V TTL High/Low
Trigger Mode L (Non-repeatable) / H (Repeatable)
Delay Time 5 - 200 seconds (adjustable)
Block Time 2.5 seconds (default)
PCB Dimensions 32mm x 24mm
Operating Temperature -15°C to +70°C

5 reviews

A

Anonymous

Mar 23, 2026

Rating: 5/5

Perfect for Arduino Projects

Works exactly as described. Easy to wire up with my Uno board. Sensitivity potentiometers are very responsive.

A

Anonymous

Mar 14, 2026

Rating: 3/5

Works but sensitive to heat

Had some issues with false triggers near a heater. Once moved away, it worked fine. Good for the price.

A

Anonymous

Mar 03, 2026

Rating: 5/5

Reliable Motion Detection

Bought five of these for a hallway lighting project. All five work perfectly. No false triggers after initial setup.

A

Anonymous

Feb 17, 2026

Rating: 4/5

Good sensor, tricky calibration

The detection range is good but took some time to calibrate the delay time correctly. Otherwise solid build.

A

Anonymous

Jan 31, 2026

Rating: 5/5

Great value for money

Comparable to more expensive modules. The TTL output makes integration with microcontrollers very straightforward.

5 FAQ

Q: How do I adjust the sensitivity?

A: There are two potentiometers on the board. One controls delay time, the other controls sensitivity range.

Q: Is this suitable for outdoor use?

A: The module itself is not waterproof. You need to house it in a waterproof enclosure for outdoor applications.

Q: What is the maximum detection distance?

A: Typically up to 7 meters in ideal conditions, but 3-5 meters is more reliable for human detection.

Q: Can this run on 3.3V logic?

A: Yes, the output is 3.3V TTL compatible, but input voltage should be at least 4.5V for stable operation.

Q: Does it work with Raspberry Pi?

A: Yes, connect the VCC to 5V, GND to GND, and OUT to a GPIO pin configured as input.

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