Nuts and Volts - November 2011

SMILEY’S WORKSHOP ☺

style numbered pins to do input from an eight-bit DIP switch, and output that state to eight LEDs. The illustrations for the Butterfly had both the pin numbers and the port/pin numbers, but since the Arduino figures did not have the ports shown, we’ll use Figure 7 which shows the port pin numbers with Px for the port followed by the pin number. For example, PD5 is PORTD pin 5. In Figure 8, we see how the Arduino pins relate to the ATmega328 port/pins.

As usual, I’ve been having so much fun I wasn’t paying attention to the time. It looks late and long, so let’s put the code in avrtoolbox at http://code.google. com/p/avrtoolbox/avr_applications/ simple_chaser_lights. Note that the hardware to do the chaser light project (as shown in Figures 9 and 10) with either the Arduino or the Butterfly is available from the article link. Refer to last month’s Workshop for more details on how these are wired.

■ FIGURE 9. Chaser lights using the AVR Butterfly.

■ FIGURE 10. Chaser lights using the Arduino board.

can purchase my C Programming book and Butterfly projects kit at www.nutsvolts.com. NV

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www.canakit.com

Cana Kit

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Final Thoughts

Questions? As usual, if you want to be helpful when you find a problem or have a question you’ll need to put on your biohazard suit and start a thread on www.avr freaks.net with the word ‘avrtoolbox’ in the title (I probably will see it). Read my blog entry first, that will tell you why you need the biohazard suit at http://smileymicros.com/blog/ 2011/01/24/using-an-internet-forum.