futz f&ts v.i. To tinker experimentally; to change something just to see what it does.
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 Here it is! My first "real" AVR article. It isn't much, but it's a start. An ATMega88 with a 16x2 LCD. The code is WinAVR C. The LCD is wired in 4-bit mode and has the R/W line connected for busy checking. No delays, so it's fast. |
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 Recently I was following this thread at electro-tech-online and decided to build one of Mike-K8LH's blinky things. It's a 20-LED charlieplexed array with 32 PWM levels per LED, all driven by 5 pins of an 8-pin PIC 12F683, leaving one input-only pin free for other uses. The software, written by Mike in SourceBoost BoostC is quite complex, but easy to use. All the technical stuff is handled by the interrupt service routine. I can't say I totally understand it yet, but I will. |
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 After doing the ATMega88 LCD article I knew that 50-pin adapter had to go. I received my DigiKey order with a bunch of 2x3 male and female connectors and went to work. |
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 This project uses a PIC 18F4620 to read and write to a 32MB SD card I had left over from my new camera. It uses a 74LCX245 Low Voltage Bidirectional Transceiver to convert the 5V logic of the PIC to 3.3V for the SD card. This can also be done with simple voltage dividers, but I got the card in my recent Futurlec order, so might as well use it, right? |
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