Update broken github links

_posts/2012-04-12-hello-printer.markdown

@@ -101,19 +101,19 @@ I had already explored text-based printing with [Timmy][], but to produce someth
 
 ![Some simple graphics](/images/printer/4-simple-graphics.jpg)
 
-The printer expected the dots for printing to be encoded directly as an array of bits in memory, and so I wrote some tools to generate the corresponding C arrays [from ASCII files](https://github.com/lazyatom/Thermal-Printer-Library/commit/d5fdbf276cd1d67973231364a9d7704120bd36c9), and then [from images directly](https://github.com/lazyatom/Thermal-Printer-Library/commit/346206de3d1c86a833a59462146090976f4b2a05).
+The printer expected the dots for printing to be encoded directly as an array of bits in memory, and so I wrote some tools to generate the corresponding C arrays [from ASCII files](https://github.com/adafruit/Adafruit-Thermal-Printer-Library/pull/3/commits/d5fdbf276cd1d67973231364a9d7704120bd36c9), and then [from images directly](https://github.com/adafruit/Adafruit-Thermal-Printer-Library/pull/3/commits/346206de3d1c86a833a59462146090976f4b2a05).
 
 ![Some slightly more advanced graphics](/images/printer/5-slightly-more-advanced-graphics.JPG)
 
-The specific printer would only print up to 255 rows of dots, and so I needed to figure out how to [split larger graphics up into chunks which could be sent to the printer sequentially](https://github.com/lazyatom/Thermal-Printer-Library/commit/6010b56a01015d1674b8b12969a08f0b4706ee0c). Eventually, I was able to print graphics that were longer than 255 rows:
+The specific printer would only print up to 255 rows of dots, and so I needed to figure out how to [split larger graphics up into chunks which could be sent to the printer sequentially](https://github.com/adafruit/Adafruit-Thermal-Printer-Library/pull/3/commits/6010b56a01015d1674b8b12969a08f0b4706ee0c). Eventually, I was able to print graphics that were longer than 255 rows:
 
 ![Graphics that were longer than 255 rows](/images/printer/6-longer-graphics.jpg)
 
 ### Out of memory
 
 However, the Arduino only has a limited amount of flash memory (normally around 32k), which meant that the largest full-width image that could be compiled into the program was around 450 rows high. (That's why the above image looks like it's missing one half - I cropped it to fit in the Arduino's memory.)
 
-That was a limitation that I wasn't happy with. Obviously some external storage for the data would be required, and thankfully the [Ardunio Ethernet shield](http://arduino.cc/en/Main/ArduinoEthernetShield) comes with a MicroSD reader built in. I added the ability to convert images into files containing the right bits for the printer, and wrote an Arduino library to print bitmaps using those files (and subsequently [from any Stream object](https://github.com/lazyatom/Thermal-Printer-Library/commit/82dacbdd6c3ea6a32fe123cb1ff17b6810a4c330)).
+That was a limitation that I wasn't happy with. Obviously some external storage for the data would be required, and thankfully the [Ardunio Ethernet shield](http://arduino.cc/en/Main/ArduinoEthernetShield) comes with a MicroSD reader built in. I added the ability to convert images into files containing the right bits for the printer, and wrote an Arduino library to print bitmaps using those files (and subsequently [from any Stream object](https://github.com/adafruit/Adafruit-Thermal-Printer-Library/pull/3/commits/82dacbdd6c3ea6a32fe123cb1ff17b6810a4c330)).
 
 ![Full-width graphics of more than 255 pixel rows](/images/printer/7-full-graphics.JPG)
 
@@ -289,7 +289,7 @@ The thermal printer that I've used is the exact same one that Adafruit provide a
 
 If you were willing to sacrifice the LEDs and print button, there's no reason why you couldn't use that kit with the printer backend software presented here.
 
-News International's research lab have produced some alternative software for the Adafruit kit called the [IoT assistant](http://newsinternational.github.com/iot-assistant), which is slightly more advanced in that it can print information from your google calendar and gmail accounts too. I believe they have plans to expand their software to support more than one printer per instance, but their architecture is more centralised (the content is generated by a single server) than that presented here.
+News International's research lab have produced some alternative software (unfortunately now removed) for the Adafruit kit called the [IoT assistant](https://web.archive.org/web/20160617191333/http://newsinternational.github.io/iot-assistant/) ([extant fork here](https://github.com/jeanm4t/iot-assistant)), which is slightly more advanced in that it can print information from your google calendar and gmail accounts too. I believe they have plans to expand their software to support more than one printer per instance, but their architecture is more centralised (the content is generated by a single server) than that presented here.
 
 It's also worth mentioning some "historical" printers of note. The printer that ran [Timmy Printface][Timmy] a year ago was used by [Tom Taylor](http://tomtaylor.co.uk) in 2009 to [print out daily memos](http://tomtaylor.co.uk/projects/microprinter). His software is perhaps closer in architecture to what I've built (a printer polling from a queue). [Chris Wood](http://flipbit.co.uk/) extended the software to [print tube information](http://flipbit.co.uk/microprinting.html).