Add technical details

_board/diodes_delight_piunora.md

@@ -13,6 +13,7 @@ features:
   - Bluetooth/BLE
   - STEMMA QT/QWIIC
   - Arduino Shield Compatible
+  - USB-C
 ---
 
 Piunora is a compact, easy-to-use development board for electronics prototyping with Linux. It has a familiar form factor, legible pin labels, and a design that’s well suited to space-constrained applications.
@@ -21,5 +22,20 @@ As a carrier board for the [Raspberry Pi Compute Module 4](https://www.raspberry
 
 It may be small, but Piunora is packed with powerful peripherals that will come in handy for rapid prototyping and embedded machine-learning applications. Examples include an HDMI port, camera-input connectors, and PCI-e support, which is not present on a standard Raspberry Pi 4. Finally, the M.2 B-Key port on the rear of the board is not only useful for SSD storage, it can also host a diverse range of PCI-e expansion boards.
 
+## Technical details
+
+* Arduino UNO R3 / Adafruit Metro compatible form factor (3.3 V logic, may not be compatible with all Shields)
+* PCI-e through M.2 B-Key connector on the rear of the board with dedicated 3.3 V/3 A supply
+* Analog to Digital Converter (MCP3008)
+* On-the-fly switching between USB host (USB Type-A) and device mode (USB-C)
+* Qwiic/Stemma QT connector to easily interface with I2C devices
+* A full-sized camera connector that supports 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 depending on your choice of CM4
+* Slim design with the Piunora Lite measuring 8-12 mm and the Piunora Pro measuring 11-13 mm
+* Two user-controllable buttons (including software that turns one of them into a safe-shutdown button)
+
 ## Purchase
+
 * [Crowd Supply](https://www.crowdsupply.com/diodes-delight/piunora)