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Compared with the normally open type vibration sensor, this module has a longer vibration trigger time and can drive the relay module.
Used for a variety of vibration triggering role, report theft alarm, intelligent cart, earthquake alarm, motorcycle alarm, etc.
Module Features:
1. SW-420 normally closed vibration sensor
2. Comparator output, clean signal, good waveform, strong driving capacity, more than 15mA
3. Operating voltage: 3.3V to 5V
4. Output form: Digital switching output (0 and 1)
5. With fixed bolt holes, easy to install
6. Small board PCB size: 3.2cm x 1.4cm
7. the use of wide voltage LM393 comparator
Module instructions for use:
1. the product does not vibrate, the vibration switch is closed conduction state, the output output low level, the green indicator light.
2. when the product vibration, the vibration switch is instantly disconnected, the output output high level, the green indicator light is not lit.
3. the output can be directly connected to the microcontroller, through the microcontroller to detect the high and low levels, thereby detecting whether the environment has vibration, play a role in alarm!
Package Includes:
10pcs SW-420 Normally Close Vibration Sensor
Mike W.
2025-08-11 11:38:20
These vibration sensors are like that one friend who takes a second to react but eventually gets the job done. Sensitivity isn’t the highest, but hey, they do trigger as expected. Bonus points for the onboard potentiometer, which lets you fine-tune how much shaking it takes to set them off... because sometimes you want a gentle nudge, and sometimes you want full-on earthquake mode. Ten in a pack means you can afford to tinker (or break a few).
dumgoat
2025-06-21 15:56:45
These vibration sensors (SW-420) from Haldzemo work well and are easy to use. They have an onboard potentiometer to adjust its sensitivity. Turn it clockwise to decrease the sensitivity. I turn it counterclockwise until the built-in LED labeled "DO-LED" turns off. Then I turn it clockwise until it turns on then just slightly more. This has worked well for my needs, but it is fairly sensitive.The package includes ten sensors, and I've been happy with them so far.
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