Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | SW-420 |
| Operating Voltage | 3.3V - 5V DC |
| Output Type | Digital Switching Output (0 and 1) |
| Default State | Normally Closed (NC) |
| Sensitivity Adjustment | Via On-board Potentiometer |
| Indicator LED | Yes, Power and Trigger Indicators |
| Mounting Hole Diameter | 3.0 mm |
| PCB Dimensions | 32mm x 15mm x 8mm |
| Compatible Platforms | Arduino, Raspberry Pi, ESP32, STM32 |
| Application Scope | Anti-theft alarms, Vibration detection, Impact sensing |
Anonymous
Mar 24, 2026
Rating: 4/5
Good value, clear documentation needed
The sensor itself is high quality and triggers reliably. I deducted one star because the pinout wasn't clearly printed on the back, so I had to look up the datasheet online. Once connected, it performed flawlessly.
Anonymous
Mar 20, 2026
Rating: 5/5
Compact and sensitive
Small form factor fits perfectly inside my custom 3D printed enclosure. The potentiometer allows for fine-tuning which is essential when mounting it on different surfaces like wood versus metal.
Anonymous
Mar 18, 2026
Rating: 5/5
Reliable vibration detection
We bought ten of these for a student workshop on home automation. All units worked out of the box. The normally closed configuration is great for fail-safe alarm circuits. Highly recommended for educational use.
Anonymous
Mar 15, 2026
Rating: 5/5
Perfect for my Arduino security project
This SW-420 module works exactly as described. The sensitivity adjustment is very responsive, allowing me to tune it specifically for detecting door knocks without false alarms from background noise. Easy to wire up.
Anonymous
Mar 11, 2026
Rating: 5/5
Great for prototype alarms
Used this to prototype a vibration alarm for a tool shed. The response time is instant. It's a robust little module that handles outdoor temperature variations inside the enclosure without issues.
Anonymous
Mar 10, 2026
Rating: 4/5
Works well with ESP32
Integrated this with an ESP32 for a smart mailbox notifier. It detects the vibration of mail dropping in accurately. Just ensure you use a pull-up resistor if your microcontroller requires it, though most have internal ones.
Q: What is the maximum current this sensor can switch directly?
A: The SW-420 is designed as a signal sensor for microcontrollers, not for driving high-power loads directly. It should only be connected to GPIO pins. If you need to drive a relay or siren, please use a transistor or MOSFET driver circuit.
Q: Is there a delay between vibration and signal output?
A: The response is nearly instantaneous, typically in the millisecond range. There is no built-in programmable delay on the hardware itself; any debouncing or time-delay logic must be handled in your code.
Q: Can I use this with a 3.3V logic system like the ESP8266?
A: Yes, the module operates comfortably within the 3.3V to 5V range, making it fully compatible with 3.3V logic systems such as the ESP8266 and ESP32 without needing level shifters.
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 during normal conditions. When vibration exceeds the threshold set by the potentiometer, the switch opens, and the output goes HIGH.
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) and counter-clockwise to decrease sensitivity. Use a small screwdriver for adjustment while testing.
Air Source Heat Pump Water Heater for Commercial and Home Heating by AMA Shengneng
$8,400.00
Waterproof Dry Bag for Outdoor Rafting and River Trekking - Wet/Dry Separation Storage for Swimming, Fitness, Beach, and Sand Activities
$8.42
Maichuang Continuous Peanut Roasting Machine - Electromagnetic Drum Roaster for Soybeans, Large-Scale Production Line Equipment
$2,356.00
Free Shipping: Colorful Cartoon Hand-Crank Drum Puppet Toy for Kids – Perfect for Street Markets and Temple Fairs
$64.00
Flower Doctor Balcony Vegetable Growing Box - Family Vegetable & Strawberry Planter, Rooftop Rectangular Plastic Flower Pot
$38.09
Miracle-Gro Organic Potting Soil for Balcony Gardens, Vegetables, Green Plants, Flowers, and General Home Gardening, 40L
$195.98
Silicone Drainage Mat for Faucet Side - Splash-Proof Pad for Kitchen Sinks and Bathroom Countertops
$3.57
Complete Dairy Processing Equipment: Yogurt Sterilization Fermentation Tank and Raw Milk Cooling Tank for Farms
$17,836.00
50x80mm Biggest Size Professional Rectangular Photosensitive
$75.62
Rose poem "Fox" Fabric Fragrance Spray
$3.15
Nangong Wenfang Healing Beautiful Words Calligraphy Copybook Small Regular Script Brush Tracing Transparent Cards for Women's Practice Entry-Level Elegant Fonts
$49.00
2025 New Cute Puppy Large Capacity Portable Travel Toiletry Bag, Handheld Makeup Organizer
$9.59
Cylindrical Granule Making Equipment Rotary Granulator for Rice Flour and Tartary Buckwheat Tea
$400.00
Face Painting Sponge Kit - Teardrop and Half-Round Magic Sponges for Base, Gradient, and Quick Designs
$2.11
Nutrient Soil and Submerged Hydroponic Clay Pebbles - Backfill for Bathrooms, Planters, and Soil-Free Green Plants
$18.40
Wenmo 100% Cotton Watercolor Paper 2026 Wall Calendar/Monthly Planner 300g DIY Calendar Sheet Sketch Marker Compatible
$17.70
Self-Priming Soybean Meal Corn Crusher Vertical Feed Mixer 1-Ton Feed Crushing & Mixing Integrated Machine
$6,650.00
Invisible Retainer Storage Case - Compact, Portable, Leak-Proof Soaking Box for Orthodontic Aligners
$18.10
Outdoor Travel Storage Shockproof Deep Waterproof Case with Cushioning for Mobile Electronics Emergency Parts EDC Tool Kit
$16.00
Guangxi Soilless Cultivation Ceramsite Substrate for Orchids and Green Plants - Lightweight Stone 5-30mm, Multiple Sizes Available for Hydroponics
$7.70
Deuter Germany Imported Waterproof Dry Bag - Ultra-Light Roll-Top Storage for Outdoor Clothing, Rafting, and Swimming
$102.00
Qingzhu Paper Blending Stump Set, Sketching Paper Stumps, Professional Large Size for Art Students, 3-Pack
$2.98
Water Curtain Spray Booth – Water Circulation Paint Mist Purifier, Eco-Friendly Stainless Steel Equipment
$773.00
Maike Outdoor Waterproof Barrel Bag - Portable Shoulder/Backpack for Swimming, Rafting, Beach Travel, and Water Sports
$22.70
Biliansheng Hair Transplant No-Shave Scar Planting 1000 Grafts Crown Density Enhancement
$12,000.00
Flat Floor Cable Raceway - Self-Adhesive Wire Hider for Power Strips and Network Cables, Anti-Step Protection and Aesthetic Cover
$3.30
Children's Art Supplies Sponge Paint Brush Graffiti Painting Tool Mushroom Head Stamp Student Craft Rubbing Stick Set
$4.10
Fresh Milk Production Line for Ranch Yak Milk Camel Milk Processing Equipment Bagged Milk Filling Machine
$9,330.00
Multi-Function Car Tire Stone Removal Hook with Built-in Screwdriver - Portable Cleaning Tool for Easy Debris Extraction by Car Owners
$13.24
Ouyang Xun Jiucheng Palace Regular Script, Yan Zhenqing Duobaota Pagoda Style, and Tian Yingzhang Regular Script Card Series for Brush Calligraphy Practice
$9.90
![[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)
