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Voltage Convert Module for Grove/Qwiic (3.3V⇔5V)

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This module converts power supply voltage and signal voltage such as I2C, UART, etc.
It has Grove-compatible and Qwiic-compatible connectors.
It allows bidirectional connection of 3.3V system and 5V system.
It supports the following 4 voltage conversion patterns.

Supported voltage patterns
Pattern Master side Slave side Example
Power Signal Power Signal
5V 5V 3.3V 3.3V Arduino Uno → Qwiic Module
5V 3.3V 3.3V 3.3V M5Stack Core2 → Qwiic Module
3.3V 3.3V 5V 3.3V Raspberry Pi → M5Stack Unit
3.3V 3.3V 5V 5V Raspberry Pi → Grove Module(5V)

Part Names


Included Items

  • Board x 1

How to Connect

Connect the master and slave devices by setting jumper caps for each pattern of power supply and signal voltages on the master and slave sides as shown below.

Jumper Cap Settings (Overview)
Pattern Master side Slave side Jumper Image
Power Signal Power Signal J4・J5 J9
5V 5V 3.3V 3.3V 5V->3V3 5V conn_pow5Vto3v3_sig5v
5V 3.3V 3.3V 3.3V 5V->3V3 3V3 conn_pow5Vto3v3_sig3v3
3.3V 3.3V 5V 3.3V 3V3->5V 3V3 conn_pow3v3to5v_sig3v3
3.3V 3.3V 5V 5V 3V3->5V 5V conn_pow3v3to5v_sig5v


  • Maximum data rate
    • Open drain (ex. I2C): 2 Mbps)
    • Push-pull (ex. UART): 24 Mbps
  • Maximum output current
    • 5V → 3.3V: 1.0 A
    • 3.3V → 5V: 250 mA
  • Dimensions: W32 x D40 x H11.5 mm

External links

  • Support Page
  • The schematic (PDF), 2D CAD data (DXF), 3D CAD data (STEP), and mounting instructions are available.
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Japanese fabless manufacturer that develops hardware and associated software for Maker.