Dec 7
Sometimes i need to check the ESR values for second-hand or fresh electrolutis capacitors. Although ESR meters are available, it’s hard for me to spend a lot of bucks on one of it. So: the schematics is from ludens.cl, the case is from local supplier (a low-cost analog multimeter from China).
OpAmp, resistors and SMD capacitors are mounted. Black stripes at the bottom are milimeter marks on the metal ruler.
Apr 15
Strage things happens.
We have a new inhabitant. Hope it will become a huge German shepherd, but today it is small, curious and a bit upsett five weeks old puppy.
For now, take a look at this page .
Jan 19
I don’t like it. The temperature at 8:00AM in the morning was -27°C.
Cool. But not for my car. It did not start. Even with a booster. The battery is definetly dead.
It started at last after a battery was charged for a half an hour.
Jan 17
Q: Given a single 0,35mm² copper wire, how much current it will handle?
A: ~60A
Stupid me. Used DIY regulated transformes to start my Alfa Romeo today and hooked on the wrong connector. Alfa started. The insulation on the wire made a blue smoke, but … still working 
Anyway, got 6mm² wire for replacement.
It’s time to replace car battery too, i think. Or check the generator.
Nov 13
As promised earlier, i started the temperture controll project.
The last Atmel AVR in DIP package i had went to some ‘black box’. Have no sources for firmware, so i don’t want to touch it now.
It happens i’ve got Atmega8 in TQFP package. The only problem is the connection of TQFP to veroboard is either complicated or expensive. Read the rest of this entry »
Brrrr… Too cold.
Ever had a cold shower in (almost) winter time?
This is because the boiler behaves strangely. Although the it’s full of hot water, cold water is going out.
So, the pile of details gave me: MCU Atmega8, by Atmel; some LM335, temperature sensors by National.com. A pair of CD4051 will allow to use up to 16 analog inputs to the Atmel MCU.
Also, schematics at
http://www.geocities.com/vk3em/avr-tempc/avr-temp.htm. It has some weird details, anyway i will try to master some kind of temperature sensor for the boiler. Just to make sure the will be enough hot water when i’m going to the shower.
Brr…
Nov 2
I was asked for a signature. On the front cover of “The Capital”.
Do i need to change the way i look like?
Oct 19
Quite interesting article on image processing. The MatLAB source, presented on the site, need some minor enhancments. Authors may contact me, if they want .
Attention: the program is really slow. I used ‘direct solver’, and it took almost 10 minutes to proceed the image.
Sep 4
Š? savaitgal? buvom Vasaros Sostin?je.
Blogai.
SintetinÄ— palanga (tik nereikia įsižeisti) pasitiko sintetine BasanaviÄiaus gatve, sintetine buvusia “KaÅ¡tono” užbÄ—ga ir Å achmatine. Read the rest of this entry »
Jul 30
Some images for the first impression.
Worked in University of Rostock, Institute of Computer Graphics with prof. Heidrun Schumann and René Rosenbaum for one month. The project is about inserting additional information into digital images. As a result of the work, we had a lectures for post-graduate students (one on image watermarking, the other on information embedding).