so this is an interview question for a programmer:

swap two variables without a temporary variable

well

a=3

b=5

a=a+b

8=3+5

b=a-b

3=8-5

a=a-b

5=8-3

a=5

b=3

greetz WV

cool, its still as simple as the last time I tried, well lets see what all leads from here :)

greetz WV

Life Hack #3127: DIY Airconditioner

hate the heat or do something about it... I chose latter :D

greetz WV

first real print test

-hardware works on long runs... check
-software is stable for now... check
this looks actually ok to me. now some better coding and the results are actually usable (just 6 layers here) :D

greetz WV

3D Printer Prints...

finally...

greetz WV

Yay, hacking phones...

this time with a Sony Ericsson Xperia Arc S lt18i

this gets fun with time

greetz WV

Its alive!

First test of my gear belt driven bridge :D

greetz WV

Voltage Measuring over USB

yay, with a simple resistor divider I can measure the temperatur of my sensor (variable resistor), this way Ill be able to make a better heating controller :D

greetz WV

3D Printer over USB

finally I had time to rewrite my software for the stepper motor controller card, so now I can use it over my USB IO board/expansion board. Now all that is left to do, is the additional stepper controller (my circuit), but I guess I forgot to buy some parts for it, so it will take a while... and then yeah, build the damn mechanics!

greetz WV

Expansion Board IO

Here a demo of using my Expansion Board for IO

greetz WV