The GnuVision Blog

It was Insignia day 2 today - and it was time for the hack-the-badge contest! I reached the CS department by 2:30 and
saw that there were only a few participants. I began by describing how the badge PCB was built using GNU/Linux tools. This was followed by a very brief introduction to the Attiny […]

[Read more →]

Got the badge PCB today afternoon.

It looks good - except that I made a big blunder - forgot to take a mirrored image! Anyway, very, very happy to
see my first `built with GNU/Linux’ product !! I am off to get a soldering iron to test it out …

[Read more →]

Finished writing the code for the badge; nothing fancy - just 4 red LED’s and a switch. The muC goes to power down mode after executing some initialization routines - the current consumption is less than 1uA in this mode. The switch connected to PB4, when pressed, will result in a pin change […]

[Read more →]

Started building my poor imitation of the Defcon badge today; I am using uisp with the simple direct parallel port access circuit.

I am going with the 8 pin ATTiny15L - don’t want to spend time soldering smd stuff. A 3V button cell is the power source. The tiny15 is much more capable than the […]

[Read more →]

I have been busy with classes for the past few days. I am also learning to do a bit of PCB design with GEDA - GNU EDA Tools. Doing schematic capture with Gscheme and PCB design with
PCB is not that hard - but there is an acute lack of documentation in this area.
I […]

[Read more →]