by Diodes Delight

A tiny-but-mighty open-source carrier board for the Raspberry Pi CM4

Jul 06, 2021

Production Delays

Production is progressing on multiple fronts. I submitted my final design files to my PCBA fab four weeks ago. I've also been in contact with a fab to produce recyclable paper packaging for Piunora, and I just got pictures for the samples that I ordered. Those samples arrived at my main production fab so they can test packing up the final production prototypes once they are ready. Unfortunately, issues with PCB silk screening have forced me to push the estimated ship date back to the first half of October. Thank you for your patience, and see below for more details. Read the full update.

Jun 03, 2021

Components & Beta Testers

Our project was fully funded, and we even exceeded our goal! Thank you so much to everyone who backed the campaign. It means a lot to us! We've been very busy over the past few weeks, buying all of the components for the first batch of Piunoras. Initially, it was looking like we might be facing considerable delays due to component shortages, but we managed to secure all of the components we need by finding drop-in replacement for parts that were out of stock. This update also includes a brief update on our beta testers, all of whom have received their Piunoras! Read the full update.

May 07, 2021

Pre-Production Boards

First off, thanks again for all your support. We are very close to reaching our funding goal! So, if you were planning on getting a board...now is the time :) This post also includes pictures of the pre-production boards that I just received from my CM and updated information about our estimated shipping schedule. Read the full update.

May 06, 2021

Hackster Cafe

Just a short update to let you know that I was on Hackster Cafe today at 10 AM PDT / 7 PM CEST I talked about Piunora and other projects I've done in the past. You can check it out at https://www.youtube.com/watch?v=WT6lvuTxpYw Read the full update.

Apr 28, 2021

Machine-Learning Demo

In this update I want to show you how easy it is to create custom machine learning models for your Piunora using tools like Edge Impulse. Edge Impulse recently added support for the Raspberry Pi 4 and, along with it, the Compute Module 4. In fact, you don't need anything but your Piunora for the entire workflow covered in this update! Read the full update.

Apr 16, 2021

Pre-Release Schematic

Just a quick little update to let you know that I uploaded the schematic for our current pre-release board to Piunora's hackaday.io project page. We thought it might help answer some of the questions that our more curious users have been asking. Read the full update.

Apr 09, 2021

Prototyping Can Be Fun & Easy!

There are some really cool things you can do when you combine an electronics dev board with a Linux SoC! Today, I want to show you how easy it is to prototype with Piunora by making a sensor-based game controller. In the demo below, we are using Adafruit Blinka (a library that enables CircuitPython code on Linux) and an Adafruit VCNL4040 distance sensor attached by a single cable to Piunora's Qwiic/Stemma-QT connector. No breadboards or soldering required! Read the full update.

Apr 02, 2021

Introducing the Piunora M.2 B-Key 2280 Extender

I have received a lot of requests for ways to support long, 2280 M.2 devices. While Piunora is small—and therefore only supports up to 2242 devices in its native form factor—I love seeing people come up with cool hacks, and I want to help out however I can. (One such request was for a PCI-e-to-4x-RS232 adapter. Who knew that was even a thing!?) Anyway, in response to these requests, I have added an adapter board to the campaign. Read the full update.

Mar 30, 2021

It Begins!

I'm excited to announce that the crowdfunding campaign for Piunora has begun! This has been a thrilling journey for me. It all started with a little weekend project back in December 2020 that ended up with me starting a side business—Diodes Delight—and developing Piunora into a real product. Read the full update.

$18,042 raised

of $15,000 goal

120% Funded! Order Below

Product Choices


Piunora Pro

A compact, feature-rich CM4 carrier board


Piunora Lite

Perfect if you need the slimmest possible form factor. Includes all features of Piunora Pro except for the camera connector and the PCI-e M.2 port.


M.2 B-Key 2280 Extender

Expands Piunora's M.2 port to accommodate full-length 2280 peripherals. Keep in mind that such devices are quite a bit longer than Piunora itself, so they might look a little awkward hanging off the end there. But, if you have a cool idea that depends on a 2280 M.2 accessory...this is the product for you.


Raspberry Pi CM4 (Lite, Wireless, 1 GB RAM)

From the Crowd Supply Basics project.

Something for your Piunora to carry.

This CM4101000 variant of the Raspberry Pi Compute Module 4 is a System on Module (SoM) containing an ARM quad-core Cortex-A72 processor, 1 GB RAM, 2.4 and 5 GHz 802.11b/g/n/ac Wi-Fi and Bluetooth 5.0, and supporting power circuitry. Does not include eMMC flash.


Raspberry Pi CM4 (8 GB eMMC, Wireless, 2 GB RAM)

From the Crowd Supply Basics project.

Something for your Piunora to carry.

This CM4102008 variant of the Raspberry Pi Compute Module 4 is a System on Module (SoM) containing an ARM quad-core Cortex-A72 processor, 2 GB RAM, 2.4 and 5 GHz 802.11b/g/n/ac Wi-Fi and Bluetooth 5.0, 8 GB eMMC flash, and supporting power circuitry. With this eMMC variant of the CM4, the SD Card interface is not usable.


Heatsink for CM4

You can operate the CM4 without a heatsink just fine, but if you have some extra-heavy computation to do, then a heatsink can help prevent thermal throttling of the SoC. Includes a mounting footprint for a 30 mm fan (not included) should you want to integrate it into an enclosure or take your CM4 to even greater extremes of computation. Also includes a set of stacking pin headers to accommodate expansion boards.


microSD Card

From the Crowd Supply Basics project.

Boot media for the "Lite" (CM4101000) variant of the CM4. We recommend 64 GB or smaller.

An industrial-grade memory card with extended endurance.


RPi CM4 Wi-Fi Antenna Kit

From the Crowd Supply Basics project.

An omnidirectional 2 dBi gain 2.4/5 GHz Wi-Fi antenna with panel-mounting hardware and an approximately 7.5" (19 cm) cable to connect the antenna's SMA connector to the CM4's U.FL connector. It is "certified for use with the Raspberry Pi Compute Module 4".


Diodes Delight

An open source hardware company and consultancy

Timon Skerutsch



PCB Fabrication & PCB Assembly

See Also

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