Product Details
The Piunora by Diode Delights is a super - compact and user - friendly development board for electronics prototyping on Linux. It has a well - known form factor, clear pin labels, and a design perfect for space - limited applications. As a carrier board for the Raspberry Pi Compute Module 4 (CM4), it's like a tiny version of the Raspberry Pi 4 Single Board Computer (SBC) with the flexibility to fit custom shapes. CM4 - based devices such as Piunora work great with software written for the Raspberry Pi 4, as long as the software considers the hardware in use. Some CM4 versions come with eMMC memory, which is more reliable than a regular SD card. Despite its small size, Piunora is loaded with powerful peripherals! Key features include an Arduino UNO R3 / Adafruit Metro compatible form factor (3.3 V logic, might not work with all Shields), a PCI - e through M.2 B - Key connector on the back with a dedicated 3.3 V / 3 A supply, an Analog to Digital Converter (MCP3008), on - the - fly switching between USB host (USB Type - A) and device mode (USB Type - C), a Qwiic/Stemma QT connector for easy I²C device connection, a full - sized camera connector for all Pi - compatible cameras, a full - sized HDMI 2.0 port, a WS2812 Smart RGB LED for user status, optional Wi - Fi or eMMC options based on your CM4 choice, a slim design (Piunora Lite is 8 - 12 mm and Piunora Pro is 11 - 13 mm), two user - controllable buttons (one can be a safe - shutdown button with software), and it's open hardware with design files and software published upon shipping. Note that the Pi 4 Compute Module isn't included, but we have them here. If you don't need many extras, the Piunora Lite uses the same PCB as the Piunora Pro but skips the bottom - side components to save space and cost.
Using the Piunora is easy. First, make sure you have a Raspberry Pi Compute Module 4 (CM4) as it's not included. Insert the CM4 into the appropriate slot on the Piunora. When connecting devices, use the Qwiic/Stemma QT connector for I²C devices, the full - sized camera connector for Pi - compatible cameras, and the HDMI 2.0 port for displays. You can switch between USB host and device modes easily using the built - in functionality. Regarding the buttons, one can be used as a safe - shutdown button after setting up the software. For maintenance, keep the board clean and away from dust and moisture. Since it's an open - hardware product, you can always refer to the published design files and software for any customizations or troubleshooting. Remember that the 3.3 V logic might not be compatible with all shields, so test your shields carefully before full - scale use. Also, if you choose a CM4 with eMMC memory, enjoy its reliability over a traditional SD card.
