Tuesday, February 22, 2011

Some current and finished projects...

Last month i rewrote my bool solver from scratch. This time i wrote it in pure C - without C++ elements. It has almost all functions of the old version plus some new ones, but the new program is much shorter. Documentation and comments are in german... thats why i do not upload it.

Because the old firmware (version 4) of the AtTiny clock was pretty ugly, i rewrote and changed many parts of the firmware. The new version has the number 5. The new code runs like a charm and as a bonus it eliminates the problems i had with the buttons (it was not a hardware problem).
Release will be soon. Only a calibration function for the quartz is still missing. ^.^°

And one last thing: i disassembled my old Acer travelmate 220 notbook and under the sticker of an IC i found an Atmel AtTiny25 as part of the charging circuit. It communicates directly with the laptop battery through TWI/I²C. The foto was made with my Canon EO350 / Digital Rebel XT / Kiss Digital N with an hand hold lens in retro position - the IC was so damn small:

Thursday, February 17, 2011

Movie about the build of integrated circuits

A movie made by Fairchild semiconductor about building integrated circuits. The video is from 1967!

Fairchild Briefing on Integrated Circuits

I finally watched the whole video (i have never found the time till today)... interesting. :D

Sunday, February 13, 2011

UART - Video

In this small video, you can see a simple counter made with my UART board. The program for counting up the LEDs is running on a PC. The µC only communicates with the PC and is responsive to his commands.

Battery adapter

Yesterday i did a 5 minute hack.
Because i have lots of old AA batteries with some residual energy (i guessed) lying arround, but my mp3 player needs AAA batteries, i made this adapter, to make use of the old AA cells.

The AA cells were used in an old compact camera. They do not work in the camera any more - thx to the crappy cam! - but with one of those AA cells i was able to power my mp3 player for about 2 5 hours and the battery is still not empty!
Quite nice for a batterie which seemed to be empty. ;)

I think the images are self explaining.