In this short entry I want to show you my method of adding images into a pcb layout with the pcb application from gEDA package.
Tags: design, geda, image, pcb, projektowanie pcb, płytka drukowana, silkscreen
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Below there is a list of symbols and footprints prepared by me for gschem and xpcb software packages, maybe this will save somebody some time.
The list is really short at this moment, but I will expand it in time.
Today I would like to show and describe you my keypad with serial interface mini project which we can directly connect to mcu UART (for me it was Atmega8 and Atmega32, but you can connect it with any other chip with build-in uart).
In the last days I had a lot of work and, as you probably know, a lot of work means a lot of stress… In order to relieve this stress, I have been playing the Sauerbraten game 
. It is the best free linux game and it is open source, so we have the access to the source code of the whole application / game, and hence we can modify it.
Today I am going to be a bit more commercial. Having cleared up my storehouse I found a few components that remained after the production of small series. I have 100 pcs of Atmega8A-PU, 100 pcs of MAX232 RS232 converters and 100 pcs of DS18B20 temperature sensors for sale. MAX232 and Atmega8A-PU in DIP package and DS18B20 in TO92 package. The price list is shown below. If you have any questions or doubts… go ahead and write me!
Recently I needed to have a mobile internet connection in my notebook. And as I got a borrowed BlueConnect (Polish telecom product) with the Huawei E173 modem, I decided to share with you my experience of installing it on ubuntu (Linux generally).
In this post I would like to describe my mod for Creative Inspire T3000 2.1 system. My problem was that I was unable to connect 2 or more audio source to my set (at my case it was the notebook + home server + pc box).
This project was created as part of my home automatics system. It is a relay card controlled from the PC over a RS-232 port. The card may also be expanded to 5 extra input channels. The project that I describe is a complete solution including hardware with firmware and the software part for PC which consists of linux console utility, php library and java/swing window application.
Co prawda już po walentynkach, jednak dopiero teraz znalazłem odrobinę czasu aby pokazać co zmajstrowałem dla swojej lepszej połówki z tej okazji. Chciałem aby to było coś niebanalnego, coś co będzie pełniło funkcje walentynki a jednocześnie, coś w czym oddam kawałek siebie – swojej pracy. Padło na wyświetlacz widmowy Założenia Przede wszystkim wyświetlacz miał być [...]
Potrzeba matką wynalazku! Co zrobić gdy potrzebujemy zaopatrzyć nasz układ oparty o mikrokontroler (np. At90s2313, attiny2313 i pochodne) w prosty przetwornik A/D, przy czym akceptujemy błędy pomiarowe na poziomie +/- 5% ? Naturalnie można podłączyć zewnętrznego ADC na I2C, ale w przypadku gdy chcemy tylko zorientować się jak wygląda napięcie lub dokonać jego nie dokładnego [...]