Add Pimoroni Explorer (adafruit/circuitpython#10778)

Author: tyeth

_board/pimoroni_explorer2350.md

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+---
+layout: download
+board_id: "pimoroni_explorer2350"
+title: "Pimoroni Explorer (RP2350) Download"
+name: "Pimoroni Explorer (RP2350)"
+id: "PIM720"
+manufacturer: "Pimoroni"
+board_url: "https://shop.pimoroni.com/products/explorer"
+board_image: "pimoroni_explorer2350.jpg"
+date_added: 2024-08-22
+family: rp2350
+bootloader_id: "pimoroni_explorer2350"
+downloads_display: true
+blinka: false
+features:
+  - Breadboard-Friendly
+  - Display
+  - Robotics
+  - Solder-Free Alligator Clip
+  - Speaker
+  - STEMMA QT/QWIIC
+  - USB-C
+---
+
+An electronic adventure playground for physical computing, built around the high-performance RP2350B chip.
+
+Pimoroni Explorer is designed for playing with circuits, building science experiments, and prototyping tiny robots. It features a large **2.8" IPS LCD screen** surrounded by **six tactile buttons**, making it easy to monitor and control your projects. With an integrated **mini breadboard**, **servo headers**, and **analog-friendly crocodile clip terminals**, it’s a self-contained workstation for tinkering without the mess of loose wires.
+
+## Features
+
+- Powered by RP2350B (Dual Arm Cortex M33 running at up to 150MHz with 520KB of SRAM)
+- 16MB of QSPI flash supporting XiP
+- 2.8” IPS LCD screen (320 x 240 pixels, ST7789V driver)
+- USB-C connector for power and programming
+- Mini breadboard for circuit prototyping
+- Piezo speaker for audio feedback
+- 6x user-controllable tactile switches, plus reset and boot buttons
+- 2x Qw/ST (Qwiic/STEMMA QT) connectors for I2C breakouts
+- 4x 3-pin servo outputs
+- 6x crocodile clip terminals (3x ADCs, plus 3.3V and Ground)
+- 2-pin JST-PH connector for adding a battery (input voltage 3V to 5.5V)
+- Fully-assembled (no soldering required)
+- Programmable with C/C++ or MicroPython
+
+## About RP2350
+
+The RP2350 chip is the "Double Quarter Pounder & Fries" to the RP2040's "Double Cheeseburger." It features upgraded dual-core Arm Cortex-M33 processors and introduces optional RISC-V cores for specialized development.
+
+In addition to the modern M33 ARM cores, you get a significant boost in PIO capability, lower power states for battery-efficient projects, and a robust security architecture. 
+
+Performance-wise, you can expect "real world" MicroPython tests to run up to 2x faster than on the RP2040, while floating-point math in C/C++ is up to 20x faster. The extra on-chip RAM and external PSRAM support make a massive difference when working with memory-intensive operations like driving the Explorer's high-resolution display.
+
+The Pimoroni Explorer uses the **RP2350B** variant, which features 48 usable GPIO pins, enabling the dense integration of the screen, servos, and expansion headers all on one board.
+
+## Purchase
+
+* [Pimoroni](https://shop.pimoroni.com/products/explorer)