The Fairywren User Manual

Overview

Introduction

Kickstarter Project

The Fairywren project successfully raised its funding goal on 11 Aug 2013 on Kickstarter.com

Please refer to: http://www.kickstarter.com/projects/kwang/mini-itx-motherboard-for-the-raspberry-pi-fairywre

What is Fairywren?

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hackaday.com –

Shown above is a fairly simple Raspberry Pi setup. There’s the Raspi itself, a 2.5″ hard drive, a USB hub, GPIO expansion, and wireless and Bluetooth adapters. Throw in the power supplies for all these devices, and you’ve got a real mess on your hands. There is a solution to this problem of a Gordian knot of USB and power cables: the Fairywren, a board that turns your Raspberry Pi into a Mini-ITX computer.

The basic idea behind the Fairywren is to take the basic outline of a Mini-ITX motherboard and add goodies like a real-time clock serial port, and USB hub while providing a secure mounting place for a Raspberry Pi. It turns a Raspberry Pi into a proper computer, with all the ports in the rear, and is compatible with a whole slew of Mini-ITX cases.

Package contents

Fairywren K40

The £40 level on Kickstarter:

Fairywren K50

The £50 level on Kickstarter:

Fairywren K120

The £120 level on Kickstarter:

Specifications

• Dimension: 170mm × 170mm
• Operating temperature: 0℃~ 70℃
• Operating humidity: 20% ~ 90%
• Input power: 12V, 3A

Screws, Nuts and Stand-offs

Plastic ones

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Metal ones

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Connectors, Buttons and LED Indicators

On-board I/O connectors/ports

• 1 × 24-pin ATX Power connector
• 3 × Power connectors (12V, 5V, 3.3V)
• 4 × USB ports
• 1 × Serial port (RS-232)
• 1 × Raspberry Pi 26-pin GPIO connector
• 1 × 3-pin Cooling Fan connector
• 1 × XBee connector
• 1 × Power Switch connector
• 1 × Power Indicator connector
• 1 × IR Receiver connector

Buttons, switches and LED indicators

• 1 × Arduino Reset button
• 1 × I2C-GPIO toggle switch
• 1 × XBee toggle switch
• 1 × Serial Port control jumper
• 1 × Cooling Fan voltage control jumper
• 1 × USB Hub status LED indicator
• 1 × User Defined RGB LED

Hardware Details

Power Sources

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• P3 24-pin ATX Power connector
• P11 +3.3V power output terminal
• P12 +5V power output terminal
• P13 +12V power output terminal
• PLED1 Power switch indicator pins
• Power1 Power switch pins

USB Ports

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• RaspiUSB The port connects to the Raspberry Pi
• USB0 USB Port 0
• USB1 USB Port 1
• USB2 USB Port 2
• USB3 USB Port 3

Serial Port

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• J1 Standard 9-pin Serial Port (RS-232)
• P18 Raspberry Pi/XBee Selective Jumper

Connect the Serial Port to the Raspberry Pi

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Connect the Serial Port to XBee

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When the Serial Port is connecting to XBee, S1 should be switched to Pi_UART:
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The Raspberry Pi

Mount the Raspberry Pi on the Fairywren board with the mounting holes[tooltip text=”Please use the standoffs provided ” placement=”top”][?][/tooltip] and GPIO connector:
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GPIO Pins

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In Fairywren K50 and K120, a pair of 25Pin-26Pin GPIO Cables are provided. The connector can be mounted on the back panel. So that the Raspberry Pi GPIO pins can be reached without opening the case.
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Arduino

RTC

The Fairywren comes with on-board RTC(Real Time Clock). To make it work, a battery[tooltip text=”Not provided in any of the Fairywren models. ” placement=”top”][?][/tooltip](Model: CR1220) is needed.
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Temperature Controlled Cooling Fan

XBee

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IR Remote Control

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Hard Drive and Arduino UNO

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