Added Speaker pHAT draft

draft/overlay/pimoroni-speaker-phat.md

@@ -0,0 +1,49 @@
+<!--
+---
+name: pHAT DAC
+class: board
+type: audio
+formfactor: Speaker pHAT
+manufacturer: Pimoroni
+description: An I2S digital speaker and VU meeter
+buy: https://shop.pimoroni.com/products/speaker-phat
+image: 'pimoroni-speaker-phat.png'
+pincount: 40
+eeprom: no
+power:
+  '2':
+ground:
+  '6':
+  '9':
+  '14':
+  '20':
+  '25':
+  '30':
+  '34':
+  '39':
+pin:
+  '3':
+    mode: i2c
+  '5':
+    mode: i2c
+  '12':
+    name: I2S
+  '35':
+    name: I2S
+  '40':
+    name: I2S
+install:
+  'devices':
+  - 'i2s'
+-->
+#Speaker pHAT
+
+Speaker pHAT crams an I2S DAC and mono amplifier, a tiny 8Ω 2W speaker, and a 10 LED bar graph all onto one teeny little pHAT. It's the neatest way to add audio to you Pi project, and its beautiful artwork evokes an 80s boombox!
+
+Though designed to match the format of the Raspberry Pi Zero it is compatible with all 40-pin GPIO Raspberry Pi variants (2/B+/A+/Zero).
+
+To get the pHAT DAC set up and ready to go you can use the one-line product installer:
+
+```bash
+curl -sS https://get.pimoroni.com/speakerphat | bash
+```