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Green circuit board with 40-pin GPIO header and board-to-board connector

LORDWORLD

LORDWORLD Pi4B Adapter V1.0 40-Pin GPIO for CM4 CB1

SKU CH-0KM7-JVBQX

A 40-pin GPIO adapter that lets a Raspberry Pi CM4 or BTT CB1 core board connect to BigTreeTech SKR and Octopus 3D-printer mainboards running Klipper

  • Runs Klipper on Bigtreetech boards via CB1 module
  • Matches Raspberry Pi 4B performance with CM4 installed
  • 40-pin GPIO supports existing Raspberry Pi add-ons
  • Uses official Raspberry Pi BTB connector for CM4 fit
  • Cost-effective path to Linux-based 3D printer control

Adapter Purpose

The LORDWORLD Pi4B Adapter V1.0 provides a 40-pin GPIO header for a Raspberry Pi CM4 or BTT CB1 core board. It lets users run Klipper firmware on compatible BigTreeTech printer boards such as the SKR Mini E3 V3.0, SKR V1.4 Turbo, SKR 3 and Octopus V1.1 or Pro. The adapter targets makers who want a Raspberry Pi 4B-compatible interface without sourcing a full-size board.

Thermals and Power

The adapter is a passive PCB with no active cooling components, so it adds negligible heat to the host board. Power draw is limited to the current required by the attached compute module and any GPIO peripherals. In normal printing operation the assembly runs silently and stays within the thermal envelope of the host controller.

Sustained Load Behaviour

Under continuous Klipper workloads the adapter simply passes signals between the compute module and the printer board without throttling. Stability depends on the CM4 or CB1 module’s own thermal management and the host board’s power delivery. The board-to-board connector matches the official Raspberry Pi specification, ensuring reliable contact during long print jobs.

Highlights

  • Runs Klipper on Bigtreetech boards via CB1 module
  • Matches Raspberry Pi 4B performance with CM4 installed
  • 40-pin GPIO supports existing Raspberry Pi add-ons
  • Uses official Raspberry Pi BTB connector for CM4 fit
  • Cost-effective path to Linux-based 3D printer control

Specifications

BrandLORDWORLD

Questions about this item

How do I attach the Pi4B Adapter V1.0 to my CB1 board, and what alignment mistake should I avoid?

Seat the CB1 onto the board-to-board connector using the same BTB layout as the Raspberry Pi CM4; the key step people miss is matching the notch orientation before pressing down, otherwise the 40-pin GPIO header will not line up with the motherboard.

Will the 40-pin GPIO header or the BTB connector need replacement after extended use in a Voron printer?

Both connectors are soldered to the adapter PCB and rated for the mating cycles of the Raspberry Pi CM4 ecosystem; under normal Klipper workloads they do not require scheduled replacement.

What thermal or power limit appears first when running Klipper continuously on a CB1 mounted through this adapter?

The CB1 core board itself reaches its thermal throttle point before the adapter’s 40-pin GPIO or BTB connector hits any current ceiling, so sustained loads are limited by the module’s own cooling, not the adapter.

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