Alarm Clock First Post
I finally started doing design/testing for the alarm clock idea that I came up with about Christmas last year.
I built the programmer for the AVR microcontroller that I am using. Its the simplest programmer and uses the parallel port. Its basically a parallel port housing with 1k resistors in series to specific pins. That is it. Fits in the housing, so a picture would be pretty boring. I have to remember to apply power to the chip separately.
Which points to my next mini-step, making a stable power supply. I considered just using the 5v lines from my motherboard, but I will probably use a spare power supply that I have. I hooked up a usb hub to the motherboard power, and every once in a while I manage to short it and my computer shuts down. That would be bad in development and I don't want any fires/broken computer.
Pinouts follow:
Color | AVR | Parallel Port | Name |
Black | pin 1 | pin 7 | AVR/RESET |
Green | pin 19 | pin 8 | AVR SCK (clock input) |
Red | pin 17 | pin 9 | AVR MOSI (instruction in) |
White | pin 18 | pin 10 | AVR MISO (data out) |
Silver | pin 22/8 | pin 18 | Signal Ground |
I need to check the pinouts on my specific chip, I'll update this page with the chip model number/checked pinouts when I get there.
Reference: AVRDUDE
Its dirt cheap and really basic. Now to find out if it works... LED blinking, here I come!
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