Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | 801S |
| Comparator Chip | LM393 |
| Operating Voltage | 3.3V - 5V DC |
| Output Type | Digital Switching Output (0 and 1) |
| Sensitivity Adjustment | Potentiometer Adjustable |
| Detection Principle | Vibration Spring Switch |
| Board Dimensions | 32mm x 14mm x 5mm |
| Mounting Hole Diameter | 3.0mm |
| Indicator LED | Power and Trigger Status |
| Compatible Platforms | Arduino, Raspberry Pi, STM32 |
Anonymous
Mar 26, 2026
Rating: 5/5
Reliable vibration detection
I bought five of these for a student workshop. All of them worked out of the box. The digital output makes interfacing with microcontrollers incredibly easy without needing extra code for analog reading.
Anonymous
Mar 23, 2026
Rating: 4/5
Compact and effective
The size is perfect for small projects where space is tight. The LED indicator is bright enough to see status clearly. Only minor issue is the pin headers were not included, but that is standard for these modules.
Anonymous
Mar 21, 2026
Rating: 5/5
Excellent sensitivity range
The range of adjustment on the potentiometer is impressive. You can make it sensitive to a light tap or require a strong shake. This flexibility makes it useful for various applications beyond just robotics.
Anonymous
Mar 13, 2026
Rating: 5/5
Perfect for my alarm project
This sensor module works exactly as described. The LM393 comparator makes the signal very clean, and adjusting the sensitivity with the potentiometer was straightforward. I used it to detect bumps on a robot chassis, and it responded instantly.
Anonymous
Mar 08, 2026
Rating: 3/5
Works well but documentation is sparse
The hardware itself is solid and functions correctly. However, I had to search online for a good tutorial on how to wire it up initially. Once I figured it out, it has been working great in my security prototype.
Anonymous
Mar 02, 2026
Rating: 4/5
Good value, needs careful tuning
Great little board for the price. It took me a few minutes to get the sensitivity right so it wouldn't trigger from ambient noise, but once set, it is very reliable. The soldering points are well-labeled.
Q: What is the maximum voltage I can supply to the VCC pin?
A: The operating voltage range is 3.3V to 5V DC. Please do not exceed 5V as it may damage the LM393 chip and the LED indicator.
Q: How do I adjust the sensitivity?
A: There is a blue potentiometer on the board. Turn it clockwise to increase sensitivity (detect lighter vibrations) and counter-clockwise to decrease it. Use a small screwdriver for adjustment.
Q: Is the spring switch replaceable if it breaks?
A: The spring switch is soldered directly to the PCB. While technically replaceable with soldering skills, it is designed as a durable component for normal hobbyist use and rarely fails under standard conditions.
Q: Does this module output an analog signal or digital?
A: This module outputs a digital signal (HIGH/LOW or 1/0) via the DO pin. It uses the LM393 comparator to convert the vibration input into a clean digital switch.
Q: Can I use this with a 3.3V microcontroller like ESP32?
A: Yes, absolutely. Since the module operates between 3.3V and 5V, it is fully compatible with 3.3V logic systems like the ESP32, ESP8266, and 3.3V Arduino boards.
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