Gravity: Digital Peristaltic Pump V2 for Arduino
- $24.50 3+ items
- $24.00 5+ items
- $23.00 10+ items
Introduction
The Gravity: Peristaltic Pump V2 is a compact liquid-handling pump for repeatable dosing, controlled dispensing, and automated fluid transfer. The V2 combines a revised drive mechanism with a dedicated 12V DC motor supply to support steadier operation under load. A standard three-pin Gravity connection carries the servo-style control signal, making the pump straightforward to integrate into microcontroller projects. The pump head comes with a BPT tube and two fittings, and the package includes 1 m of silicone tubing and a 10 mL graduated cylinder for setting up and checking dispensed volumes.
Revised Drive Mechanism for Steadier Dosing
The V2 updates the internal transmission, assembly, and firmware to reduce output shaft slippage under load. The revised mechanical design also improves resistance to vibration and fatigue during repeated operation. In a dosing setup, a steadier drive helps the pump deliver more consistent volumes from one cycle to the next. The included graduated cylinder makes it easy to measure the volume delivered by the assembled setup and calibrate dispensing intervals for the project.
Dedicated 12V Motor Power
The motor draws power through a dedicated 12V DC input, and the control interface uses a separate 3.3~5V logic supply. The 12V design gives the motor more power margin than the first-generation pump and helps maintain steadier torque when the fluid path presents more resistance. This power arrangement also supports longer dispensing runs and projects that start and stop the pump repeatedly, such as a timed dispenser that delivers small amounts throughout the day.
Gravity Connectivity with Servo-Style Control
The three-pin Gravity interface uses a servo-compatible pinout and accepts a PPM control signal with a 20ms period. A compatible controller such as Arduino can generate the required pulses using familiar servo-control routines. The included Gravity cable connects the pump driver to the control circuit. A project can use a timer, a sensor reading, or a button press to trigger a dispensing cycle without designing a separate motor driver.