Raspberry Pi 4 Mini-ITX carrier board. Meet Over:Board (Crowdfunding)

While the Raspberry Pi 4 SBC is popular for its small form factor, affordable hardware, and good software support, the Raspberry Pi Compute Module 4 offers more flexibility and allows makers and companies to design their own hardware matching their requirements, while still leveraging the existing software support.

We’ve already seen a mini-ITX carrier board for the Raspberry Pi 4, namely the upcoming Turing Pi 2. However, the board has very specific use cases in mind since it’s a cluster board designed for four Raspberry Pi Compute Modules 4. But British engineer Ross Nicholls has designed Over:Board carrier board for Raspberry Pi Compute Module 4 for most traditional use cases, in essence, designing what amounts to a Raspberry Pi 4 mini-ITX motherboard with SATA, PCIe, etc.

Over-board Raspberry Pi Compute Mobule 4 mini-ITX carrier board

Over:Board specifications:

  • Compatible SoM’s –  Raspberry Pi CM4 or CM4Lite with Broadcom BCM2711 quad-core Cortex-A72 processor, up to 8GB RAM, up to 32GB storage. optional Wireless module (WiFi 5 + Bluetooth 5)
  • Storage – MicroSD card slot, SATA port via USB SATA controller
  • Video Output – Dual HDMI 2.0 outputs
  • Audio – 3.5mm audio jack via USB audio codec
  • Networking – Gigabit Ethernet port;  optional wireless on RPi CM4
  • USB – 2x USB 2.0 host ports, 1x Micro USB client port
  • Serial – DB9 COM port (RS232)
  • Expansion
    • 40-pin Raspberry Pi GPIO header
    • Full-size PCIe 1x V2.0 slot
  • Debugging – UART header
  • Misc – RTC with a backup battery, front-panel header, CPU fan header/fan controller
  • Power Supply – 24-pin ATX connector, 4-pin alternate power input
  • Dimensions – 170x170mm (Mini-ITX form factor)

Raspberry Pi 4 mini-ITX motherboardA 4-port USB hub is used for the two USB 2.0 ports, the USB SATA controller, and USB audio codec. THere’s no USB 3.0 like on the Raspberry Pi 4 because the PCIe interface is exposed through a PCIe slot instead of being connected to a PCIe to USB 3.0 bridge. Over:Board mini-ITX carrier board for the Raspberry Pi CM4 module will allow people to design mini-ITX computer with the guts of a Raspberry Pi 4.

The board has just been launched on Indiegogo as a flexible funding campaign.  As you can see from the renders, the board does not exist yet, even in prototype form. But Ross claims to have 20+ years of experience in hardware and software development having designed many such PCBs. Since it’s a personal project, he didn’t include information about his company/employer, which does not help with trust. I could however find one Ross Nicholls in CHELTENHAM, UK that specializes in 3D printing and low-volume production.

Nevertheless, production is scheduled to take place in three steps:

  1. 15 prototype boards from 3 manufacturers available in March 2021, 9 of which will be sent to backers who pledge around $271+ US.
  2. 50 to 100 pre-production boards (depending on demand)  for a trial run in May 2021. Required pledge: $203+ US.
  3. Full production batch for 99 GBP ($135 US) per unit scheduled for September 2021.

Price is a little on a high-side, and it might have also helped to complete stage 1 before the crowdfunding campaign. We’ll see how it goes.

Via LinuxGizmos

Share this:

Support CNX Software! Donate via cryptocurrencies or become a Patron on Patreon

ROCK Pi 4C Plus
Notify of
The comment form collects your name, email and content to allow us keep track of the comments placed on the website. Please read and accept our website Terms and Privacy Policy to post a comment.
Weller PCB manufacturer