working at 32×24 LED matrix, PIC 16f59

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Working at my LED matrix. 768 LEDs! 32×24 pixels. I want to write a 3D graphics demo. There are electrical issues. The display drive did not work correctly and during 3 days I was not able to figure out what’s wrong. So I removed all of the ICs + replaced with more advanced technology. I use a 16f59 microcontroller now … Continue reading

68000 single board computer prototype

Not many people have built single board computer this way. It only has 8 MHz CPU speed. You can get a STM32 board which has 170 MHz for little money, or a so-called Raspberry PI also for low price. … What is interesting here is the challenge because it is so difficult to build it manually. There are even no schematics! I … Continue reading

USB gizmo…

1. USB Gizmo It can show japanese characters! Individually programmed 5120 bits. There is a software on the Windows PC side too. Visual Studio C++ is used! It can link via USB. 2. Random images shown on my homepage hitechworld.org The redesign for my website is now completed. I added a script to display a random picture each time. This … Continue reading

How to use japanese language for LED matrix scrolling message tag

How can this be done? It is not so easy, as the LED matrix does not understand UNICODE. I have digitized japanese katakana font from a character LCD, about 5120 individual bits. This exists as binary data inside the microcontroller. I want to write the scrolling message on Windows PC, and transfer the text via USB. There are many individual … Continue reading

LED matrix scrolling messsage tag

Recently I have constructed two small LED matrix scrolling message tag. A 16F57 controller was used. The program was written in XC8. Almost all of the program FLASH is used (nearly 90%). Since this is for demonstration only, I made the source code available: http://pic.hitechworld.org/data/ledmatrixtag/ One board has 10 columns and 5 rows, the other has 2 additional columns (12 columns, … Continue reading

Nintendo Gamecube controller

New controller arrived yesterday. The flat Wii controller did not work at all. Or maybe the control program was not good enough. I wrote it in C language initially. However, the timing is in the microsecond range. There are 1uS pulses! This only leaves 8 instructions (at 32 MHz). I made another circuit to get this controller working. It is … Continue reading

LCD computer

I have one 1.8″ color TFT circuit working now. Recently I connected Nintendo Gamecube control pad. Today I actually connected the 3 wires! I want to test scrolling capabilities. A circuit for larger 2.4″ display is currently under construction. It has 512 K RAM, and a large controller chip. The old prototype is also shown, based on a small 44 … Continue reading