futz f&ts v.i. To tinker experimentally; to change something just to see what it does.
 Just received a AVR Butterfly Carrier kit from Ecros Technology. Nice little board. It makes experimenting with the AVR Butterfly much easier than the usual rats nest of wiring it is if you do it without the board. It's less than $20, so it's well worth getting if you have a Butterfly. |
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 Decided to play with an RGB LED I got in one of my last orders. I happened to have a 16F876 on a breadboard for some reason, so it got used.
I needed three PWM's, and the PIC only has two hardware PWM pins, so I had to come up with a software PWM algorithm. The software was written after reading a post by Sceadwian at electro-tech-online.com. His method works just fine. |
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This board uses a MAX7219 to drive four 7-segment LED displays. The MAX7219/MAX7221 are compact, serial input/output common-cathode display drivers that interface microprocessors (µPs) to 7-segment numeric LED displays of up to 8 digits, bar-graph displays, or 64 individual LEDs. Included on-chip are a BCD code-B decoder, multiplex scan circuitry, segment and digit drivers, and an 8x8 static RAM that stores each digit. Only one external resistor is required to set the segment current for all LEDs. |
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 This project interfaces a PIC16F877 to a AGM1264F 128x64 Graphic LCD. I started out writing in Hi-Tech PICC Lite, but switched partway to SourceBoost BoostC. The project isn't totally finished yet. I finished a fairly useable graphic engine and a complete 5x7 font, but haven't got around to doing the text engine yet. It will come... eventually.
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 In this project I connected a 16x2 LCD to the Junebug's CON3 connector. The LCD runs in 4-bit mode with delays, as there are no more pins on CON3 to do a R/W busy line with. This project was the inspiration for my Junebug PortB Mod, which gives access to PortB pins 0-5. |
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