A
Anonymous
Apr 04, 2026
Rating: 5/5
Works perfectly
Easy to connect and very sensitive. Great for my alarm project.
Description
SW-420 Alarm Sensor, Normally Closed Vibration Sensor
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Operating Voltage | 3.3V to 5V DC |
| Output Signal | Digital (High/Low) |
| Comparator IC | LM393 |
| PCB Dimensions | 32mm x 14mm |
| Mounting Hole | 3mm |
| Sensitivity Control | Adjustable Potentiometer |
| LED Indicators | Power and Trigger Status |
| Pin Interface | 3-Pin PH2.54 Header |
| Working Temperature | -10°C to 50°C |
| Weight | 3 grams |
5 reviews
A
Anonymous
Mar 07, 2026
Rating: 4/5
Good value
Does the job well. Had to adjust the pot slightly for my case.
A
Anonymous
Mar 06, 2026
Rating: 4/5
Solid component
Bought 10 for our club. All working well. Fast shipping.
A
Anonymous
Feb 21, 2026
Rating: 5/5
Reliable trigger
Using it for a box tamper alert. No false positives so far.
A
Anonymous
Jan 18, 2026
Rating: 5/5
Beginner friendly
Clear labels on the board. Helped me learn about digital sensors.
5 FAQ
Q: What is the detection range?
A: It detects physical vibration on the module itself, not distance-based.
Q: Does it come with jumper wires?
A: No, the package includes only the sensor module.
Q: How do I wire this to an Arduino?
A: Connect VCC to 5V, GND to GND, and DO to a digital input pin.
Q: Can I use this outdoors?
A: The PCB is not waterproof. Please enclose it in a protective case.
Q: Is this module compatible with Raspberry Pi?
A: Yes, it works with Raspberry Pi GPIO pins using 3.3V logic.
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