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.
Southern Red Agate Loose Beads for DIY Crystal Jewelry Making, Round Bead Accessories and Materials
$1.10
3-Tier, 4-Tier, 5-Tier Double-Layer Drainage Rack, Water Bucket Stand, Floor-Standing Thickened Rack
$276.32
Multi-Layer Over-Toilet Storage Rack for Bathroom, Drill-Free Floor Stand for Washing Machine and Balcony Organization
$46.96
Thickened Industrial Scouring Pad Emery Stainless Steel Abrasive Cloth Pot Scrubber Rust Removal and Polishing Wheel
$7.28
Wall-Mounted Bathroom Toilet Paper Holder and Tissue Dispenser Rack
$49.00
Arches French Watercolor Paper 300g/640g/850g, Cold/Hot Press, 100% Cotton, Deckled Edge, 2K/4K/8K
$29.60
Wen Xin Tang Yan Zhenqing Duobao Pagoda Stele Calligraphy Copybook, Tang Regular Script, Adult Beginner Calligraphy Practice Cards
$49.30
![[Shenzhen Best Seller] Premium Wearable Negative Ion Air Purifier - Neck-Hanging Portable Electronic Mask](https://www.gosteppe.com/cache/small/product/268987/legacy-main-5f71c8070119587e6427efe9.webp)
[Shenzhen Best Seller] Premium Wearable Negative Ion Air Purifier - Neck-Hanging Portable Electronic Mask
$298.00
Teruisi Electric Fruit and Vegetable Slicer, Multifunctional Chopper for Cafeterias and Hotels, Cutter for Green Onions, Chili Peppers, Radishes, and Ginger
$3,798.00
Waterproof Phone Pouch for Diving, Swimming, Rafting, and Hot Springs, Sealed Underwater Storage Bag with Waist Strap
$12.90
Premium Thick Cardstock Lin Zexu Representative Small Regular Script Infinite Life Sutra Close-Up Copying Calligraphy Copybook Regular Script for Beginners
$39.80
Zunjue Ticket-style 100% Cotton Watercolor Paper 300g Cold Press for Artists with Deckled Edges
$10.20
Kids' 3D Printing Pen – 3D Stereoscopic Drawing Toy for Girls, Perfect Birthday Gift
$104.66
Mifaner Handmade Watercolor Sketchbook – Oil Painting Series Canvas Journal, Travel-Friendly Mini Notebook for Acrylic Markers
$16.90
(Sasha Exclusive) Fat Small Card
$1,399.00
Silicone Faucet Side Drain Mat, Foldable Splash-Proof Pad for Kitchen Sink and Bathroom Washbasin
$4.93
Breathable Portable Invisible Aligner Case with Lanyard – Durable Hygienic Storage for Orthodontic Retainers and Dentures
$18.10
Snail-Specific Slug & Snail Killer Scatter-Type Anti-Pest Granules for Vegetable Gardens Slugs Apple Snails Fruit & Vegetable Fields
$10.00
Industrial Scouring Pad for Woodworking, Paint Sanding, and Polishing - Ultra-Fine Hand-Tear Sheets
$135.70
Custom G80 Manganese Steel Lifting Chain - High-Strength Alloy Chain Rigging for Hoisting and Cranes
$655.00
High-Concentration Oxygen Generator for Aquaculture with High-Pressure Outlet, Ceramic Nano Disc, and Oxygen Dissolution Cone
$50.00
Paint Brush Rinser – Art Supply Cleaning Cup for Brushes, Palettes, and Pigment Washing
$21.80
Heidelberg Printing Press Paper Pressure Wheel Screen Printing Roller Felt Wheel Guanghua Beiren Paper Feed Wheel Laminating Machine Brush Wheel
$6.00
Baofeifan Bubble Squeeze Painting Kit for Kids - Foaming Textured Paper, Wood Pulp Cotton DIY 3D Art with Markers
$10.00
Westwood Portable Retainer Case for Elderly Dentures and Children's Orthodontic Correctors, Storage Box
$14.20
PELICAN 1510 Protective Safety Case with Trolley - Waterproof Travel Box for Outdoor Photography Gear
$1,360.00
![Haisen [Exclusive Purchase Link] Livestream Link for New Arrivals and Clearance - Incense Sticks, Coil Incense, Agarwood, Sandalwood, Powder, Burners](https://www.gosteppe.com/cache/small/product/268968/legacy-main-4bd453bbd9b19100c4fd925a.webp)
Haisen [Exclusive Purchase Link] Livestream Link for New Arrivals and Clearance - Incense Sticks, Coil Incense, Agarwood, Sandalwood, Powder, Burners
$13.80
Ultralight Silicone-Coated Waterproof Dry Bag for Outdoor River Trekking, Rafting, Swimming, Beach Use – Wet/Dry Separation Storage for Swimwear and Towels
$38.20
Food Warmer Cabinet, Room Temperature Commercial Constant-Temperature Display Case, Egg Tart Heating Cabinet, Small Countertop Sample Retention Cabinet, Chestnut, White
$239.00
Ultra-Narrow 8/9/10cm Bathroom and Kitchen Gap Storage Rack with Wheels
$15.90
![[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)
