801S Vibration Sensor Module

DESCRIPTION

The 801S Vibration Sensor Module is a sensitive micro shock detecting sensor that operates by changing its resistance when a shock or vibration is detected.

KEY FEATURES OF 801S VIBRATION SENSOR MODULE:

- Outputs a logic HIGH when module senses a vibration

- On-board LED indicator

- A gold alloy plating ensures a long service life of sensor

- 3.3V and 5V logic compatible

The sensor operates in any orientation and is extremely sensitive to any type of movement such as a light tap or vibration.  Unlike many sensors that use a mechanical switching element, this sensor uses resistive element that changes resistance with motion.

The module output is normally LOW and outputs a series of random HIGH pulses when a vibration or shock is detected.  The on-board LED is normally ON and goes OFF momentarily or appears to flicker when a shock is detected.  It can take up to 2 seconds for the output to return to a steady LOW after the shock / vibration is removed

There are two variants we have seen on this module with different resistor values.  The current draw is either about 2mA or about 10mA @ 5V.  Most of that is due to the on-board LED.

The module includes an LM393 comparator with a potentiometer to allow adjustment of basic sensitivity level.  Turning the potentiometer CCW increases sensitivity.

Module Connections

There is a 3-pin header on the assembly for making connections.

1 x 3 Header 

- ‘-‘  = Ground

- Dout = Digital Output

- ‘+’ = Vcc 3V to 9V (3.3V or 5V typical)