Resources
Product wiki

PiTray Mini Carrier Board For Raspberry Pi Compute Module 4 With Gigabit Ethernet And Cluster Computing Support
The PiTray Mini is a compact carrier board designed specifically for the Raspberry Pi Compute Module 4 (CM4), providing an efficient and cost-effective platform for cluster computing, embedded systems, and industrial applications. Featuring the same dimensions and mounting hole layout as the Raspberry Pi Model B, the board can be easily integrated into existing Raspberry Pi cluster setups while offering the enhanced reliability and performance advantages of Compute Module 4. With support for CM4 variants featuring onboard eMMC storage, the board delivers faster disk I/O performance and improved system reliability for both standalone and clustered deployments.
Designed with practicality and affordability in mind, the PiTray Mini includes Gigabit Ethernet, USB 2.0 connectivity, full-size HDMI output, and a standard Raspberry Pi HAT-compatible GPIO header. An onboard eMMC boot switch simplifies operating system flashing for CM4 modules with eMMC storage, while a microSD card slot supports CM4 Lite variants. By focusing on essential interfaces and eliminating rarely used components such as dual micro HDMI, USB 3.0 hubs, DSI, CSI, and audio connectors, the board provides an economical solution for cluster builders, IoT gateways, HTPC systems, RetroPie projects, and embedded computing applications.
Key Features

Designed for Raspberry Pi Compute Module 4: Dedicated CM4 carrier board.
Model B Compatible Form Factor: Same outline and mounting holes as Raspberry Pi Model B.
Ideal for Cluster Computing: Optimized for CM4 cluster deployments.
Gigabit Ethernet Connectivity: Reliable high-speed network communication.
eMMC Boot Switch: Simplifies operating system flashing for eMMC-equipped CM4 modules.
MicroSD Card Support: Compatible with CM4 Lite variants.
USB 2.0 Interface: Supports external peripherals and storage devices.
Full-Size HDMI Output: Direct display connectivity.
GPIO HAT Connector: Compatible with Raspberry Pi HAT expansion boards.
Compact Design: Suitable for embedded and space-constrained applications.
Enhanced Reliability: Benefits from CM4 eMMC storage options.
Energy Efficient Platform: Supports CM4 variants without WiFi and Bluetooth modules.

Applications

Raspberry Pi CM4 clusters
Edge computing systems
Industrial automation
IoT gateways
Network appliances
Embedded Linux systems
Home servers
Mini NAS projects
RetroPie gaming systems
HTPC media centers
Educational computing clusters
Custom embedded applications

Board Overview

Specifications

CM4 socketx1

Set of standard Raspberry Pi HAT connectors x1

Standard HDMI 2.0 connector x1

Gigabit Ethernet RJ45 socket x1

Native USB 2.0 connector x1

SD card socket for CM4 variants without eMMC x1

USB Type-C connector for powering and also programming eMMC variants of CM4 x1

Boot Mode Switch for programming mode and normal mode x1

RUN button for easy reset x1

Red Power LED x1

Green Activity LED x1

Mounting holes for CM4 x2

CM4 corner marks for CM4 position guidance x4

Input power: +5V

Dimensions: 85 mm x 56 mm

Package List:

PiTray minix1