Merge pull request adafruit#231 from makermelissa/master

Raspberry Pi 4!

Author: ladyada

_blinka/raspberry_pi_4b.md

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+---
+layout: download
+board_id: "raspberry_pi_4b"
+title: "Raspberry Pi 4 Model B Download"
+name: "Raspberry Pi 4 Model B"
+manufacturer: "Raspberry Pi Foundation"
+board_url: "https://www.raspberrypi.org/products/raspberry-pi-4-model-b/"
+board_image: "raspberry_pi_4b.jpg"
+download_instructions: "https://learn.adafruit.com/circuitpython-on-raspberrypi-linux/installing-circuitpython-on-raspberry-pi"
+downloads_display: true
+blinka: true
+features:
+  - Wi-Fi
+  - Bluetooth/BLE
+  - Ethernet
+  - Dual micro-HDMI
+  - 40-pin GPIO
+---
+
+The Raspberry Pi 4 Model B is the newest Raspberry Pi computer made, and the Pi Foundation knows you can always make a good thing better! And what could make the Pi 4 better than the 3? How about a faster processor, USB 3.0 ports, and updated Gigabit Ethernet chip with PoE capability? Good guess - that's exactly what they did!
+
+The Raspberry Pi 4 is the latest product in the Raspberry Pi range, boasting an updated 64-bit quad core processor running at 1.4GHz with built-in metal heatsink, USB 3 ports, dual-band 2.4GHz and 5GHz wireless LAN, faster (300 mbps) Ethernet, and PoE capability via a separate PoE HAT.
+
+- Broadcom BCM2711, Quad core Cortex-A72 (ARM v8) 64-bit SoC @ 1.5GHz
+- 1GB, 2GB or 4GB LPDDR4-2400 SDRAM (depending on model)
+- 2.4 GHz and 5.0 GHz IEEE 802.11ac wireless, Bluetooth 5.0, BLE
+- Gigabit Ethernet
+- 2 USB 3.0 ports; 2 USB 2.0 ports.
+- Raspberry Pi standard 40 pin GPIO header (fully backwards compatible with previous boards)
+- 2 × micro-HDMI ports (up to 4kp60 supported)
+- 2-lane MIPI DSI display port
+- 2-lane MIPI CSI camera port
+- 4-pole stereo audio and composite video port
+- H.265 (4kp60 decode), H264 (1080p60 decode, 1080p30 encode)
+- OpenGL ES 3.0 graphics
+- Micro-SD card slot for loading operating system and data storage
+- 5V DC via USB-C connector (minimum 3A)
+- 5V DC via GPIO header (minimum 3A)
+- Power over Ethernet (PoE) enabled (requires separate PoE HAT)
+- Operating temperature: 0 – 50 degrees C ambient
+- A good quality 2.5A power supply can be used if downstream USB peripherals consume less than 500mA in total.
+
+## Purchase
+* [Adafruit](https://www.adafruit.com/product/4295)
+
+## Contribute
+
+Have some info to add for this board? Edit the source for this page [here](https://github.com/adafruit/circuitpython-org/edit/master/_blinka/{{ page.board_id }}.md).