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Generating 3D Graphics on an LCD screen and a PIC micro
Posted by ozkal on Friday, February 22 @ 17:42:52 EST (4018 reads)
Topic Atelye

3D graphics had been always of a great interest to me.

Within this system, a 3D cube is drawn on a 128x64 graphics LCD and rotated around three axises either by pressing buttons or automaticaly by switching a demo button on.

The demo switch can be seen above the screen.

There are plenty of free source code for rotating a 3D code around its axises. I also searched the net for such a code and adapted to my circuit. The original code i've found is also downloadable at the end of the article. Credits of the code can be found on the file itself.

The circuit based on a PIC 18F458 microcontroller can be seen above.

At the end of the article, the proteus schematic file for the circuit can be found, the circuit can be simulated on proteus. The hex file for programming a micro and source code is also included.

(Read More... | 2007 bytes more | comments? | Score: 0)

PIC-PONG, a classic game on pic and graphic LCD
Posted by ozkal on Friday, February 22 @ 17:36:28 EST (4176 reads)
Topic Atelye

Around 40 years ago, when someone talks about a video game, this was it to be only thing to think about. Well I also paid at the fairs to play with this simple thing.

With the circuitry given, this classic game is realized on a microcontroller system and it is playable by using two potentiometers. The graphics are presented on a monochrome 128x64 graphics LCD screen.

For the initial boot screen, i've searched simple graphics on the net. I've found some gifs and converted them to monochrome and then into hexadecimal values by using the bmp2asm program.

The game has got a demo mode in which it plays by itself (it even scores) and shows a real time clock.

The circuit produces beeps sounds when the ball hits the frame or the rackets just like the original game.

The circuitry is above and is based around a PIC 18F458 microcontroller.

At the end of the article you can find the proteus drawing and simulation file, hex file to be programmed into the controller etc.

(Read More... | 2065 bytes more | 1 comment | Score: 0)

LCD ekranda bitmap grafik kullanýmý
Posted by ozkal on Friday, February 22 @ 17:28:12 EST (3866 reads)
Topic Atelye

Bu devre ile grafik özelliklere sahip 128x64 piksellik monokrom LCD ekrana bitmap grafik yazma denemesi yaptým.

paint ile yaptýðým minik bir çizimi, tek renk olarak kaydettikten sonra bmp2asm programýný kullanarak hexadecimale çevirdim.

Sonra bu hex sayýlarý constant lar halinde koda gömerek uygun formatta LCD ekrana gönderdim.

PIC 18F458 kullandýðým devrenin þemasý yukarýdaki gibidir.

Yazýnýn Devamýnda devrenin proteus çizimi ve simülasyon dosyasý, microcontrolleri programlamak için hex vs gerekli tüm dosyalarý bulabilirsiniz.

(Read More... | 1798 bytes more | comments? | Score: 0)

LED conversion for halogen bicycle headlights
Posted by ozkal on Friday, February 22 @ 17:18:40 EST (3925 reads)
Topic Atelye

Bu devreyi, halojen ampul kullanan ve dolayýsý ile yanma süresi çok kýsa olan bisiklet farýmý LEDE çevirmek için yapmýþtým.

Üzerindeki tek tuþ ile ledlere uyguladýðý pwm sinyali, dolayýsýyla da LED parlaklýðý ayarlanabiliyor.

En tasarruflu modda tek led flaþör þeklinde çalýþýyor.

PIC 12F675 kullanýlan devre oldukça basit ve cateye bisiklet farýnýn baþ bölümündeki minik boþluða sýðabilecek þekilde düþünülmüþtür.

Yazýnýn Devamýnda devrenin proteus çizimi ve simülasyon dosyasý, microcontrolleri programlamak için hex vs gerekli tüm dosyalarý bulabilirsiniz.

(Read More... | 1710 bytes more | 1 comment | Score: 0)

RS485 Network
Posted by ozkal on Monday, June 25 @ 16:40:12 EDT (5310 reads)
Topic Atelye

I've designed this project last year for a company but they cancelled the rest of the work for some reason i don't know. Instead of having it rust in the dust, i'm sharing it with you.

The project is basically a communication network by using the RS485 physical layer. A master can address and control 254 slaves and see their sensory inputs.

(Read More... | 2903 bytes more | 2 comments | Score: 4)

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