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New batch of boards are in - hopefully I can find the threads where these all came up!
Pictured from top left going clockwise:

Dual '328 Processor board with space for RS232 driver (MAX232) - 10 available, $5 mailed to your US location.

12 digit driver board with '328 and TCIP6B595s - 10 available, $5 mailed to your US location.

4 digit driver board with '328, RS232, and SD socket - 10 available, $5 mailed to your US location.

Mega Screw shield! Attach 86 3.5mm screw terminals to securely access the 86 IO pins of a Mega - 54 available. $13.60  mailed to your US location.
Discussed here  http://arduino.cc/forum/index.php/topic,118807.30.html
I'm ordering material for kits: $41.25/kit for the board, ten stackable headers, 86 screw terminals (in groups of 2-4-5).


* batch_of_boards.jpg (140.93 KB, 1011x701 - viewed 49 times.)
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Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

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Hey CrossRoads, I am curious about the Dual '328 board.  What is/was the purpose of it or what was it intended for.  Is it like to 2 Arduinos on one board?

Thanks
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The dual 328 board came out of this thread
http://arduino.cc/forum/index.php/topic,115711.0.html
It is the equivalent of 2 arduinos less the USB/Serial interface chip on one board with RS232 level signals available on a header to connect either/both uC to a DB9 type connector.
Dual 6-pin FTDI header allows either uC to connect to USB with an FTDI cable, FTDI Basic, or connection to FTDI Breakout board or CP2102 module.

The original idea was to provide dual processing capability with SPI, I2S, or UART connectivity between the cards with user added jumpers.
I tried to make it with a single crystal between the uCs, but it got to be too much hassle (or perhaps just my inability to use avrdude at the command level) - so instead each uC can be bootloaded via their own ICSP header as an Uno (optiboot) and no fooling around getting fuses set up is needed.
One could always go that route with a jumper from XTAL2  on the crystal-equipped to the other processor's XTAL1 input. See '328 datasheet 9.4 and 9.8. Some fuse setting changes are needed.
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Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

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Great! boards sir, though I would like to see a dual core board sharing the XTAL.
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As I said, it was a lot of hassle to make that work - I couldn't get it done with avrdude commands, it was easier to just 40 cents worth of parts and then use standard bootloader/fuses.
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Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

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PM me your info, I would like one of the Dual '328 boards.

And Thanks for the explanation.
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//LiNK

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