Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | SW-420 |
| Operating Voltage | 3.3V - 5V DC |
| Output Type | Digital Switch Output (Normally Closed) |
| Sensitivity Adjustment | Adjustable via Potentiometer |
| Indicator LED | Yes, Power and Trigger Indicators |
| Mounting Hole Diameter | 3.0 mm |
| PCB Dimensions | 32mm x 15mm |
| Compatible Platforms | Arduino, Raspberry Pi, STM32 |
| Application Range | Anti-theft alarms, Vibration detection, Impact sensing |
| Package Contents | 1x SW-420 Sensor Module |
Anonymous
Mar 27, 2026
Rating: 5/5
Easy to connect and test
I am new to electronics, and this module made vibration detection very simple. The LEDs clearly show power status and trigger state, which helped me debug my circuit quickly.
Anonymous
Mar 27, 2026
Rating: 5/5
Reliable for collision detection
Using these on a small robot chassis for bump detection. They are lightweight and respond instantly to contact. The mounting holes make installation sturdy.
Anonymous
Mar 19, 2026
Rating: 5/5
Perfect for my Arduino security project
This sensor works exactly as described. The normally closed logic was easy to implement in my code, and the sensitivity pot allows for fine-tuning to ignore minor vibrations while catching significant impacts.
Anonymous
Mar 19, 2026
Rating: 4/5
Works well for basic alarm systems
Integrated this into a simple home alarm prototype. It triggers reliably when the window is tapped. Just ensure you have a pull-up resistor if your microcontroller requires it.
Anonymous
Mar 03, 2026
Rating: 4/5
Good value, sensitive adjustment needed
Great little module for the price. Out of the box, it was a bit too sensitive for my use case, but after turning the potentiometer slightly, it works perfectly for detecting door knocks.
Anonymous
Mar 03, 2026
Rating: 5/5
Consistent performance
Bought five of these for a school project. All units performed consistently with no dead-on-arrival issues. The build quality of the PCB is decent for the cost.
Q: Is there a library available for Arduino?
A: Because this is a simple digital switch module, it does not require a specific complex library. You can read it using the standard digitalRead() function in Arduino. Many example sketches are available online under 'vibration sensor'.
Q: Can I use this directly with a 3.3V ESP8266?
A: Yes, the SW-420 module operates within a 3.3V to 5V range, making it fully compatible with 3.3V logic boards like the ESP8266 or ESP32 without needing a level shifter.
Q: Does this module output high or low when vibration is detected?
A: Since this is a Normally Closed (NC) module, the output is typically LOW. When vibration is detected, the switch opens momentarily, causing the output to go HIGH. However, this can depend on your specific circuit configuration and pull-up/pull-down resistors.
Q: How do I adjust the sensitivity?
A: There is a blue potentiometer on the board. Use a small screwdriver to turn it. Clockwise usually increases sensitivity (detects smaller vibrations), and counter-clockwise decreases it. Test gently while adjusting to find your sweet spot.
Q: What is the maximum distance it can detect vibration from?
A: This sensor detects physical vibration transmitted through the object it is mounted on, not air-borne sound or motion at a distance. It must be physically attached to the surface you wish to monitor.
Wenxin Tang Calligraphy and Painting Felt - Ancient Art Series, Double-Sided Wool Felt with Leather Desk Mat for Calligraphy and Painting, Colorful Soft Stain-Resistant Felt for Brush Writing Practice, Traditional Chinese Painting Supplies
$32.30
Construction Backfill Ceramsite Lightweight for Bathroom Garage Roof Base Concrete Roof Sloping Gardening Planting
$430.00
Scented Candle Making Kit - DIY Tools Including Wax Melting Pot, Thermometer, Heating Stove, and Containers
$6.46
Stainless Steel Multi-Function Bathroom Storage Rack - Over-Toilet Shelf with Multi-Layer Floor Standing Cabinet for Washing Machine
$48.98
Variable Frequency Drive Safety Function Module FSO-12 Kit
$9,900.00
Wheel Lug Nuts Compatible with Ford Focus, Kuga, Mondeo, Escort, EcoSport, Everest
$59.50
Cardboard Box Wholesale Taobao No.10/12 Paper Box Packing Hard Small Carton Half-Height Postal Express Packaging Box Custom
$0.14
New 502 Super Glue Large Bottle, Instant Adhesive for Plastic, Paper, Furniture Repair, ABS, and Hardware
$5.18
Mushroom Stick Sponge Stamp Painting Set - Rotating Brush and Printing Tool for Kids' Art and Crafts
$3.32
Yijiayi Plastic Surgery: Eyebrow Transplant, Aesthetic Artistic Brow Planting for Sparse or Missing Brows
$6,780.00
Biliansheng Hair Transplant – No-Shave Technique for Eyebrows, Beard, Widow's Peak, and Sideburns; Aesthetic Design and Hair Restoration
$2.55
Oil Pastel Blending Stumps and Smudging Tools for Painting, Mixing, and Highlighting
$4.76
Jingyangge Calligraphy Wool Felt Arm Rest Pad, Mini Felt Mat for Chinese Painting, Inkstone Protector, Creative and Exquisite Practice Mat
$9.90
Concrete Mixing Plant Gantry Car Wash Platform, Shiji Runde Tunnel-Style Gantry Car Wash Machine
$20,000.00
Baohong Watercolor Paper Artist Grade 1/2/Full/Half Sheet, Student Grade 300g 100% Cotton Pulp, Rough/Medium/Fine Grain Roll
$33.00
Metal Garden Bed - Large Size Vegetable Planter for Balcony and Home Gardening
$1,033.00
Custom Travertine Stone Signage with Natural Marble 3D Lettering and Spherical Characters for Cafes, Clothing Stores, and Studios
$170.00
CANDLE.LAB | Realistic Cookie Series DIY Aromatherapy Plaster Candle Diffuser Handmade Silicone Mold
$12.00
Zhao Mengfu Calligraphy Copybook - Running Script 'Qingyun Zhi', Red-Traced Practice Paper for Beginners in Calligraphy
$15.80
Aesthetic Street Scene Watercolor Line Art for Coloring, 16K Landscape Watercolor Coloring Book, Painting Book, Cotton Pulp Watercolor Album
$15.80
Warehouse Nitrogen Sealing Generator - High-Purity Food-Grade PSA Skid-Mounted Container Equipment
$959.00
Ransheng UV Resin Gel, UV Crystal Glue for Gemstones, Ear Cuff Sealing, Dried Flower Molds, DIY Quick-Dry UV Epoxy
$44.00
Dairy Processing Production Line, Pasteurized Milk Equipment, Low-Temperature Sterilization and Fermentation Machine for Cow and Camel Milk
$8,203.00
Blue Lint-Free Wiping Paper - Industrial Large Roll Oil-Absorbent Shop Towels
$62.00
Green-Red AB Glue 5-Minute Fast-Drying Acrylate AB Glue for Glass Ceramic Metal Structural Adhesive Quick Set
$18.13
![Northern Wei Dynasty Inscriptions: Twenty Pieces from Longmen [Rubbing] - Original Size Wei Bei Calligraphy Copybook from Luoyang Longmen Grottoes](https://www.gosteppe.com/cache/small/product/270189/legacy-main-0c626807b3c375d4d5d6a89b.webp)
Northern Wei Dynasty Inscriptions: Twenty Pieces from Longmen [Rubbing] - Original Size Wei Bei Calligraphy Copybook from Luoyang Longmen Grottoes
$40.30
Ru Kiln Celadon Ceramic Brush Washer Set - Large, Medium, and Small Ink Dishes for Chinese Calligraphy and Painting Supplies
$88.80
Multi-Layer Over-Toilet Storage Rack for Bathroom, Laundry Room, and Balcony - Floor Standing Organizer
$44.96
Wrought Iron Solid Stainless Steel Letters – Minimalist Space Signage, Custom Metal Advertising Letters for Storefronts & Feature Walls
$10.00
Shimoyama 304 Stainless Steel Telescopic Rod - Kitchen Sink Cutting Board Support Rack for Dish Drying and Cloth Hanging
$74.80
![[Youxin Electronics] GP2Y0E03 Infrared Distance Sensor Module 4-50cm Range](https://www.gosteppe.com/cache/medium/product/74667/legacy-main-4da8cadc5fc82afe91b124e3.webp)
![[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set](https://www.gosteppe.com/cache/medium/product/208273/legacy-main-9ec245ebf781f65a434ba854.webp)
