Merge pull request #839 from dglaude/CP_raspberry_pi_zero_w

Adding Raspberry Pi Zero W (not Blinka)

_board/raspberrypi_zero_w.md

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+---
+layout: download
+board_id: "raspberrypi_zero_w"
+title: "Raspberry Pi Zero W Download"
+name: "Zero W"
+manufacturer: "Raspberry Pi"
+board_url: "https://www.raspberrypi.com/products/raspberry-pi-zero-w/"
+board_image: "raspberry_pi_zero_w.jpg"
+date_added: 2022-01-07
+---
+
+**NOTE**: Not all features are supported in CircuitPython.
+
+**Raspberry Pi Zero W** Is the first small size (Wifi enabled) Raspberry Pi's single-board computers. This is the predecessor of **Raspberry Pi Zero 2 W** with the same form factor.
+
+The board incorporates a Broadcom single-core ARMv6 CPU (BCM2835) clocked at 1GHz and has 512MB of RAM.
+
+The board has a microSD card slot, a CSI-2 camera connector, a USB On-The-Go (OTG) port, and an unpopulated footprint for a HAT-compatible 40-pin GPIO header. It is powered via a micro USB socket. Video output is via a mini HDMI port; composite video output can easily be made available via test points, if needed. Sharing the same form factor as the original Raspberry Pi Zero, Raspberry Pi Zero 2 W fits inside most existing Raspberry Pi Zero cases.
+
+## CircuitPython
+
+These downloads are for CircuitPython standalone on the Raspberry Pi (not Blinka). There is no underlying operating system. It is in its early developments.
+
+This image could work on non Wifi Pi Zero but was primarly develop for the Wifi version.
+
+After installing the disk image on an SD card, the normal CircuitPython USB workflow is available over the micro-B USB connector labeled "USB".
+
+## Purchase
+* [Adafruit](https://www.adafruit.com/product/3400)