> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# PiTray mini for Raspberry Pi Compute Module 4

**Type:** Product page · **SKU:** DFR0827 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/pitray-mini-for-raspberry-pi-compute-module-4.html ([markdown](https://core-electronics.com.au/pitray-mini-for-raspberry-pi-compute-module-4.html.md))

PiTray mini is a Model B liked carrier board for building cluster with Raspberry Pi Computed Module 4 (CM4). PiTray mini focuses on providing a neat and budget solution for CM4 applications. With the same outline and mounting holes with Raspberry Pi Model B, it can be stacked upon the existed cluster. CM4 got some advantages over Raspberry Pi 4B in industrial applications.

## Pricing

- **Price:** $28.65 (inc GST) — $26.05 AUD, exc GST
- **Quantity discounts:** 6+ $24.75 (exc GST) · 12+ $23.70 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 2 today, and up to 55 more in 8–12 days.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=DFR0827:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/DFR0827:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

#### Introduction

PiTray mini is a Model B liked carrier board for building cluster with [Raspberry Pi Computed Module 4 (CM4)](https://core-electronics.com.au/search/?q=compute+module+4). PiTray mini focuses on providing a neat and budget solution for CM4 applications. With the same outline and mounting holes with [Raspberry Pi](https://core-electronics.com.au/raspberry-pi.html) Model B, it can be stacked upon the existed cluster. CM4 got some advantages over [Raspberry Pi 4B](https://core-electronics.com.au/raspberry-pi-4-model-b-4gb.html) in industrial applications. With the variants that embed eMMC storage, no matter solo setup or cluster application would be much more reliable and fast on disk I/O. At the same time, since CM4 provides models without wifi and Bluetooth chip, the new cluster would be more efficient in energy consumption, the O/S could disable these modules to save its computing resource. What cluster builders look for is a minimal layout with solid module mounting with powering and Gigabit Ethernet. PiTray mini got all of that.

Moreover, PiTray mini acts as a good starter kit for CM4. For CM4 variants with eMMC, there is an eMMC boot switch on board that just makes it a lot easier to flash Operation System image to eMMC, no need to spend time to figure out which pins should be connected to make the job done. It also includes a micro SD card socket to support CM4 Lite (without eMMC and requires a micro SD card).

To fit Compute Module 4 on a business card size carrier, PiTray mini does not include DSI, CSI sockets, audio jack, dual micro HDMI or USB3.0 hub because they are seldom applied in cluster building. Instead, it provides only one USB2.0, full-size HDMI, and HAT connectors that come natively from the chip. So it would still work sufficiently and economically for HTPC maker, RetroPie fans, and the majority of regular Raspberry Pi users, offering a similar experience to Raspberry Pi Model B.

![](https://core-electronics.com.au/media/wysiwyg/product_images/PiTray-mini-figure-desc-img.jpg)

![](https://core-electronics.com.au/media/wysiwyg/product_images/dfr0827-dimensions.jpg)

#### Specification

- CM4 socket ×1
- Set of standard Raspberry Pi HAT connectors ×1
- Standard HDMI 2.0 connector ×1
- Gigabyte Ethernet RJ45 socket ×1
- Native USB 2.0 connector ×1
- SD card socket for CM4 variants without eMMC ×1
- USB Type-C connector for powering and also programming eMMC variants of CM4 ×1
- Boot Mode Switch for programming mode and normal mode ×1
- RUN button for easy reset ×1
- Red Power LED ×1
- Green Activity LED ×1
- Mounting holes for CM4 ×2
- CM4 corner marks for CM4 position guidance ×4
- Input power: +5V
- Dimensions: 85 mm x 56 mm
 
#### Documents

- [Product wiki](https://sourcekit.cc/#/)
 
#### Shipping List

- PiTray mini ×1

## Guides for this product

- [How to Flash/Write Raspbian OS onto Raspberry Pi Compute Module 4 (CM4)](https://core-electronics.com.au/guides/raspberry-pi/how-to-flash-write-raspbian-os-onto-raspberry-pi-compute-module-4-cm4/)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/d/f/dfr0827.jpg)