Gravity Digital Vibration Sensor

The digital vibration sensor from DFRobot reports vibration, knocking and impacts as a digital signal. It detects whether a vibration occurs, but according to DFRobot measures neither its strength nor its frequency. It works at 3.3 V and 5 V, for example with Arduino, ESP32, micro:bit or Raspberry Pi.

Note: The connection cable can be converted to male pins with a Dupont cable M-M, so that it also fits an Arduino UNO.

Recommended alternative that also delivers the strength of the vibration as an analogue voltage: Gravity Analog Piezo Disk Vibration Sensor

Recommended Accessories:

• Dupont Cables M-M 10cm 20 Pieces
• Gravity IO Expansion Shield for Arduino V7.1

Features:

• Switches on vibration, knocking and impact, digital output
• Does not measure strength, frequency or acceleration (DFRobot)
• DFRobot example: evaluation via an interrupt on pin 3 with falling edge
• Operation at 3.3 V and 5 V, for example with Arduino, ESP32 or micro:bit
• Gravity PH2.0 3-pin connector, marked D for digital
• 2 mounting holes 3 mm

Application Examples:

• Vibration alarm for boxes, doors or devices
• Detecting knocks and impacts
• Experiments with a step counter
• Protection against tampering

Documentation:

• Wiki DFRobot DFR0027
• Example code for Arduino (DFRobot wiki)
• Schematic (PDF)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: DFR0027
• Supply voltage: 3.3 V to 5 V
• Interface: digital
• Switch life: up to 10 million seconds (DFRobot figure)
• Open circuit resistance: 10 MΩ
• Connector: Gravity PH2.0 3-pin (signal, VCC, GND)
• Dimensions: 22 × 30 × 7 mm
• Weight: 12 g

Scope of Delivery:

• 1× Gravity Digital Vibration Sensor
• 1× Gravity digital sensor cable 3-pin, PH2.0 to Dupont socket, 30 cm