RPi Relay Board (B) IC Test Board - Waveshare 15275

Index: WSR-13309 EAN: 5904422320478

Shield for Raspberry Pi 3 / 2 / B+ / Zero / Zero W enabling the control of up to 16 servos. It communicates via I2C interface and is based on PCA9685 system.

RPi Relay Board (B) IC Test Board - Waveshare 15275
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Manufacturer: Waveshare
Compatibility: Raspberry Pi


Shield for Raspberry Pi 3 / 2 / B+ / Zero / Zero W enabling the control of up to16 servos. It communicates viaI2Cinterface and is based onPCA9685system. Servos are powered with the voltage of5 V and a logic part works on3.3 V,the maximum current which a modulecan give is3 A. The board consumes the current directly from the pin 5 V Raspberry Pi, but for maintaining the servos, we recommend connecting additional power supply from 6 V to 12 Vvia a dual connector ARK. The kit has metal spacers with screws for mounting.

The product is compatible with Raspberry Pi

The manufacturer provides auser manualandexample of source code.


  • Disposition: PCA9685
  • Power supply:
    • 5 V directly from the RPI
    • from 6 V to 12 V via ARK connector 
  • Communication: I2C (2 pins)
  • Connecting: directly to the GPIO of the Raspberry
  • Possibility of connecting up to 16 servos
  • Resolution: 12 bit per channel
  • Supply voltage of servos: 5 V
  • Voltage of logic of servos: 3.3 V
  • Maximum current: 3 A
  • Dimensions: 65 x 30 mm

Voltage to 5.0 V
Voltage from 12.0 V
Current 4 A
Channels 16
Test 4
Package width 5.2 cm
Package height 2.4 cm
Package depth 7.1 cm
Package weight 0.025 kg



Question: Does this version of the controller also allow several of these units to be connected in series to support more than 16 servos? If so, in what way?
Answer: Overlays can be stacked, but the I2C address must be changed by soldering a resistor at the location on the board marked I2C Address.

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RPi Relay Board (B) IC Test Board - Waveshare 15275


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Michał N. 28.03.2021 Confirmed purchase Translated review
A very convenient board because it also contains a 5V power supply that can be used to power the RB. However, you have to protect yourself from cuts when dealing with larger serves.

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