Python script for the Raspberry Pi, which fetches the last Bitcoin price via the Bitstamp API, then outputs the quote to an attached Adafruit LCD screen (http://www.adafruit.com/products/1110).

bitcoinAdafruitLcdTicker.py

"""
bitcoinAdafruitLcdTicker.py
Tested with Python 2.7.3

Libraries required:
- Requests
	http://docs.python-requests.org/en/latest/
- Adafruit LCD library
	https://github.com/adafruit/Adafruit-Raspberry-Pi-Python-Code

Copyright (C) 2014 Matt Vukas

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
"""
import requests, json
from time import sleep
from Adafruit_CharLCDPlate import Adafruit_CharLCDPlate

"""
Uses the Bitstamp API to grab the current price of Bitcoin, and returns it 
as a formatted string (dollar sign beforehand, ending in 2 decimal places)
"""
def getBitcoinPriceStr():
	URL = 'https://www.bitstamp.net/api/ticker/'
	try:
		r = requests.get(URL)
		priceStr = "$" + "{0:.2f}".format(float(json.loads(r.text)['last'])) + "/BTC"
		return priceStr
	except requests.ConnectionError:
		print "Error fetching Bitcoin price from Bitstamp API"

# initialize the LCD screen and turn the backlight green
lcd = Adafruit_CharLCDPlate()
lcd.backlight(lcd.GREEN)
lcd.clear()

while True:
	outString = "Bitstamp quote:\n  " + str(getBitcoinPriceStr())
	# catch all exception handling for any hardware issues
	try:
		lcd.clear()
		print outString
		lcd.message(outString)
	except:
		print "Error pushing BTC price to LCD display"
	sleep(10) # updates screen every 10 seconds