Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Number	SW-520D
Operating Voltage	3.3V - 5V DC
Output Type	Digital Switch Output (DO)
Detection Angle	Adjustable via Potentiometer
Indicator	Green Power LED, Red Status LED
PCB Dimensions	32mm x 14mm x 4mm
Mounting Hole Diameter	3.0mm
Interface	3-Pin Header (VCC, GND, OUT)
Application Range	Tilt Detection, Vibration Alarm, Position Sensing
Package Weight	2g

6 reviews

Anonymous

Mar 25, 2026

Rating: 5/5

Perfect for Arduino projects

This module works exactly as described. The sensitivity adjustment pot makes it very easy to calibrate for specific tilt angles. I used it for a balance robot project and the response time is instant.

Anonymous

Mar 22, 2026

Rating: 5/5

Easy to integrate

Plug and play with my ESP32 board. The digital output simplifies the code significantly compared to analog sensors. Highly recommend for beginners learning about motion sensing.

Anonymous

Mar 17, 2026

Rating: 4/5

Good value, clear instructions needed

The sensor itself is high quality and the gold contacts look durable. It took me a moment to figure out the optimal potentiometer setting, but once tuned, it triggers reliably. Great for the price.

Anonymous

Mar 10, 2026

Rating: 5/5

Exceeded expectations

Very sensitive and accurate. I use it to detect when a box has been moved. The adjustable threshold is a fantastic feature that many cheaper modules lack. Will buy again.

Anonymous

Mar 05, 2026

Rating: 5/5

Reliable vibration detection

I bought five of these for a security alarm system prototype. They detect even slight vibrations consistently. The LEDs are bright enough to see status at a glance without being blinding.

Anonymous

Mar 03, 2026

Rating: 4/5

Solid build quality

The PCB is well-made and the soldering points are clean. The only minor issue is that the mounting holes are slightly tight for M3 screws, but nothing a drill can't fix. Works great overall.

5 FAQ

Q: Does this module provide an analog output signal?

A: No, the SW-520D provides a digital switch output (High/Low). It does not provide a variable analog voltage based on the angle.

Q: How do I adjust the sensitivity?

A: There is a blue potentiometer on the board. Rotate it clockwise to increase sensitivity (detect smaller tilts) or counter-clockwise to decrease it.

Q: What is the maximum current this sensor can handle?

A: This is a logic-level sensor module designed for signal detection, not for switching high-power loads. Please connect the output pin to a microcontroller or a relay driver circuit.

Q: Can I use this with a 3.3V Raspberry Pi?

A: Yes, the module operates within the 3.3V to 5V range, making it fully compatible with Raspberry Pi GPIO pins.

Q: Is the ball switch replaceable if it breaks?

A: The internal ball switch is soldered directly to the PCB. While technically replaceable with soldering skills, it is generally more cost-effective to replace the entire module.

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