Doogie's Blog

HP LaserJet P1102w Firmware Update on Mac

Update: as of the last few versions, the standard HP firmware updater appears to be working fine on the most recent OS X versions. What follows is now strictly of academic value.

I have had an HP P1102w printer for over a year now.
I've had no complaints about it so far, but a firmware update was recently released that adds AirPrint support, allowing printing from iOS devices.
The problem is: the firmware updater refuses to do anything on OS X (at least in 10.6.8 and 10.7.x).
I searched but was never able to find a solution that worked.
So, I did what any normal person would do: I loaded it up in gdb.

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Ford Misfire Diagnosis

My Dad has a Ford F-150 and has had a misfire problem under part-throttle, mid-power acceleration in the past. The first time, he took it to a mechanic who eventually diagnosed it as a coil failure. He had that one replaced (this engine has a coil on each plug) which fixed the problem, then several months later a second one failed. This one set a code and we were able to figure out which one to replace from the misfire code. This week, he has noticed the same problem creeping back up, but a code wasn't set yet. Using my scan tool, I was able to get the status of the misfire monitors and conclusively determine the cylinder with the issue.

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Laser Projector

Using extremely simple and cheap parts, I constructed a laser show projector, capable of displaying various patterns onto surfaces in a dark room.

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Server Attack Visualizer

This project consisted of two programs. The first was a server, basically just written as a shell script, which sat on a Linux machine watching log...

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AVR Plugins for Eclipse

This set of plugins for the Eclipse IDE was originally designed to provide two key functionalities when developing C/C++ programs for the Atmel AVR family of microcontrollers (way before Arduino made them cool).

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