Raspberry Pi RPi USB Expander Board by LDO Motors

Klipper users running Raspberry Pi Zero-based controllers often face USB port limitations that restrict connecting multiple peripherals, risking incomplete toolhead setups or sensor failures mid-print.

The Raspberry Pi RPi USB Expander Board by LDO Motors expands a single USB connection into 4x USB-A and 1x USB-C breakout ports, enabling seamless integration of multiple devices on compact Klipper builds. Designed specifically for Raspberry Pi Zero setups common in Voron V0 and other compact CoreXY printers, this PCB ensures reliable USB connectivity without bulky adapters. Note that standoffs are not included; M2.5 x 5mm screws are required for mounting.

Why Upgrade?

• Expand USB connectivity on Raspberry Pi Zero controllers used in compact Klipper builds like Voron V0.
• Prevent print failures caused by disconnected or missing peripherals due to limited USB ports.
• Enable multiple toolhead components and sensors to run simultaneously without USB hub clutter.
• Maintain clean, reliable wiring harnesses in CoreXY and other high-performance 3D printers.

Best For:

• Voron V0 and other compact CoreXY printers using Raspberry Pi Zero for Klipper control.
• Klipper ecosystem users needing additional USB ports for sensors, cameras, or toolheads.
• DIY 3D printer builders integrating Raspberry Pi Zero-based control boards.
• Users upgrading from limited USB connectivity setups to more robust multi-device configurations.

Pair With the Right Filament

Reliable USB connectivity supports advanced Klipper features that improve print quality with various filaments.

• PLA Filament — ideal for everyday prints where stable control electronics matter.
• PETG Filament — for durable prints requiring consistent printer operation.