I decided to create this tutorial on how to make a Bitcoin Price Ticker. Well, this is only a prototype and I will make a smaller edition with a more pleasant design and some other features at a later time. However, this serves as a nice proof of concept and hopefully it will give you some ideas for your own improvements.
This Bitcoin Price Ticker will show the price of Bitcoins in 3 different currencies (USD, EUR & GBP), and it will update the price every minute. I fetch the price from http://coindesk.com every minute which provides an average price based on multiple markets.
I will show you how to make this entirely from scatch(well almost), building your own arduino replica with an ATmega328 microcontroller to control everything, and wrapping it all in a nice casing. The only thing we won't make ourselves is the Adafruit CC3000. I have tried to explain all the steps as detailed as possible, without forcing you to spend hours reading. However, feel free to ask in case you have any questions or concerns.
Feel free to visit my blog/website for more projects and other things: http://www.cavaleri.dk
Have fun with this project! (I sure did)