Let’s start from the very beginning. In 1,790 years Alexander Volta built the first cell plating, which has been called stosem Volt. It consisted of coins made of two different metals interleaved alternately electrolyte paper pad (in this case, salt water). As a reminder: cell plating is a chemical link, which are a source of electricity by chemical reactions that take place between the electrode and electrolyte. Two electrodes submerged in elektrolicie (half cells) make up the cell plating. The difference between electrode potentials elektromotoryczna the force of the cell (SEM).
Lemon Digital Clock
Source: edw.com.pl/index.php?module=ContentExpress&func=display&ceid=231
Published: 2008/10/23 Tags: simple circuit projects
PC Controlled AT90S2313 Led Animation Circuit
Why I write about it? This system uses two ready rolls 5 x 8 LED matrix, 89C2051, is a programmable serial port and it can be very easy to adapt to the needs of the maker. If anyone has this hand can go with little effort. The microprocessor you can replace ATmega2313 on 2051-will not then need to change my software.
Animator is a device, and actually LED matrix 5×16, that is used to display a simple animation:). Initially the unit was completely to something else and it was controlled directly from parallel port using written in Pascal. The idea turned out to be a bit inappropriate since the program does not provide a steady rate. The lay in a drawer for some time, until one day, when I get it I suffered on the excess of free time:) I remembered about this project and i thought that we could somehow take advantage of. LPT Port had already occupied by 2 x 16 LCD display, which is why I built the adapter into the serial port (uprocesorze AT90S2313) and i wrote the relevant software.