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 (DO) |
| Default State | Normally Closed (NC) |
| Sensitivity Adjustment | Adjustable via Potentiometer |
| Comparator Chip | LM393 |
| PCB Dimensions | 32mm x 15mm |
| Mounting Hole Diameter | 3mm |
| Indicator LED | Power and Output Status LEDs |
| Application Range | Anti-theft alarms, Vibration detection, Toy electronics |
Anonymous
Mar 28, 2026
Rating: 5/5
Great addition to my parts bin
Always good to have a few of these on hand. They are robust enough for prototyping and the LM393 comparator ensures clean digital signals. No false triggers observed after proper setup.
Anonymous
Mar 27, 2026
Rating: 4/5
Compact and effective
Small footprint makes it easy to hide inside small enclosures. The only reason for 4 stars instead of 5 is that the mounting holes are a bit tight for standard screws, but it works with some care.
Anonymous
Mar 15, 2026
Rating: 5/5
Reliable vibration detection
I bought ten of these for a batch of student robots. They all function consistently. The normally closed configuration is ideal for our alarm logic. Highly recommended for educational kits.
Anonymous
Mar 11, 2026
Rating: 5/5
Perfect for my Arduino security project
This SW-420 module worked exactly as described. The sensitivity adjustment is very responsive, allowing me to fine-tune it so it doesn't trigger on minor background noise but catches actual bumps. Great value for the price.
Anonymous
Mar 10, 2026
Rating: 4/5
Good sensor, needs careful calibration
The build quality is solid and the pins are well-soldered. It took a little time to get the potentiometer setting just right for my specific use case, but once calibrated, it has been reliable for weeks.
Anonymous
Mar 07, 2026
Rating: 5/5
Easy to integrate
As someone new to electronics, I found this very easy to connect to my microcontroller. The documentation online is plentiful, and the module itself is straightforward with clear labeling for VCC, GND, and DO.
Q: Can I use this with a 3.3V microcontroller like ESP8266?
A: Yes, the operating voltage range is 3.3V to 5V DC, making it fully compatible with 3.3V logic systems like the ESP8266 or ESP32.
Q: What happens when vibration is detected?
A: Since this is a Normally Closed (NC) module, the output is Low by default. When vibration exceeds the set threshold, the output switches to High.
Q: Is there a delay in the response time?
A: The response is nearly instantaneous, typically in the millisecond range, limited mostly by the mechanical movement of the internal spring and the comparator speed.
Q: How do I adjust the sensitivity?
A: There is a blue potentiometer on the board. Turn it clockwise to increase sensitivity (detect smaller vibrations) or counter-clockwise to decrease it.
Q: Does this module output analog or digital signals?
A: The SW-420 outputs a digital signal (High/Low) via the DO pin. It does not provide an analog voltage proportional to vibration intensity.
Heidelberg Printing Press Automatic Blanket Wash Cloth - Non-Woven Cleaning Fabric, 500m Roll
$3,185.00
Bucket Pack Natural Wood Colored Pencils Water-Soluble for Kids Coloring and Doodling
$6.65
Chunfei Grocery Store Yunm'an GR02 Gravel Bike - Thru-Axle Disc Brake, Lightweight Touring with Multiple Rack Mounts
$6,444.00
Variable Frequency Drive Power Board ZPOW-591 for ACS880
$2,200.00
Professional Sketching Eraser Kit - Blending Stumps, Sponges, and Paper Tortillons for Highlight & Shadow Correction
$3.90
Weighted Water Bag with Handle, Thickened PV Mesh Gravity Ballast for Banner Stand Fixation (8KG)
$35.10
Ultra-Fine Purification Lint-Free Cloth Cleaning Cloth Lens Wipe High Quality 0730 Water-Absorbing Dust Removal UV Nozzle 100 Sheets
$96.00
Wen Zhengming Small Regular Script Calligraphy Cards: Li Sao Jing, Thousand Character Classic, Qin Fu, Cao Tang Shi Zhi, Qing Jing Jing, Record of the Drunken Pavilion, Red Cliff Ode
$59.00
Zhizhi Manshu Zhao Mengfu Small Regular Script Collection of Ancient Classics (Vol. 1) - Calligraphy Copybook, Brush Writing Cards, Foldable Practice Cards
$49.00
Language of Drums Motion Path Set - Essential Creativity and Rhythm Teaching Material for Drum Kits and Jazz Drums
$59.14
onlycook Sink Drain Basket, Faucet-Mounted Food Residue Separator and Washing Strainer - 1 Pack
$14.10
Heavy-Duty Wiper Arms and Blades for Trucks and Agricultural Vehicles - Universal Replacement Wiper Rubber Strips
$5.50
Bus Adapter FEPL-02 for ABB Variable Frequency Drive
$1,230.00
Baby National Trend Rattle Toy – Chewable Silicone, Easy-Grip Handle, Soft Sound for Early Learning
$19.90
Palace Museum Creative Stationery: Light & Shadow Graffiti Coloring Book - Exquisite DIY Children's Gift, Ancient Style Watercolor Set for Boys and Girls, Early Learning Art Toy
$29.70
Dongyi Study Room Antique Brass Water Pot, Brush Washer Basin, and Small Spoon Set for Calligraphy (3-Piece)
$33.10
![[Deposit Only] Slightly Round Mid-Heel Shoes – Matte Lambskin Puff Lolita Bow Pumps](https://www.gosteppe.com/cache/small/product/269338/legacy-main-1108a4ac9d29ca837505d228.webp)
[Deposit Only] Slightly Round Mid-Heel Shoes – Matte Lambskin Puff Lolita Bow Pumps
$38.00
Chunfei Grocery Store Yunan GR02 Gravel Bike with Thru-Axle Disc Brakes, Lightweight Touring Setup with Multiple Rack Mounts
$8,934.00
5A Natural Madagascar Rose Quartz Loose Beads, Pink Crystal Rhodonite Single Beads for DIY Jewelry Making Accessories
$0.70
Mini Portable Sketchbook - Blank Pocket Notebook for Doodling, Sketching, Watercolor, Acrylic, and Marker Art - Square Hand-Drawn Journal
$5.53
Kitchen Sink Drain Mat with Raised Slope - Splash-Proof Countertop Organizer for Faucet Areas
$9.00
Front Wheel Bearing for Hyundai Mistra - Mingtuo Brand - Also Fits Hyundai Sonata and Kia Opirus - Front and Rear Auto Bearings
$275.00
White Crystal Loose Beads Donghai Agate Gemstone Gold Rutilated Quartz Obsidian Bracelet Strand Aquamarine Amethyst Single Bead
$8.42
Kids Art DIY Stamp Kit - Round Sponge Daubers, Mushroom Head Stamps, and Paint for Graffiti
$2.44
YP8 YP-80000 Book Block Pressing Machine Supply Robust Structure Reliable Application
$23,790.00
Feileniao Four Seasons Flowers Line Drawing Atlas - Chinese Ink Painting Guide for Brush Beginners
$39.90
365 Days! Drummer Training Plan - Beginner Self-Study Guide for Drum Kits and Jazz Drums with Tutorial Audio
$55.00
New Rechargeable Electric Incense Making Machine – Compact Home Device for Extruding Coil, Sandalwood, and Stick Incense, Manual Incense Crafting Equipment
$268.00
Tire Stone Removal Hook, Multi-Function Tool with Built-in Screwdriver for Window Breaking and Self-Defense
$7.51
Pearl Sand Wax, Ice Flower Wax, Floating Aromatherapy Candle Colored Suspended Particles for Atmosphere Decor and DIY Crafts
$5.78
![[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)
