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Topic: A new arduino board? (Read 2 times) previous topic - next topic

ckiick

Hi,
  I was at maker faire in Austin today, and saw Massimo's book.  They had an arduino board marked "Duemilanove."  What's the scoop?  Something new?
Chris J. Kiick
Robot builder and all around geek.

mellis

I should have details up today.

nkcelectronics

Announcement is here: http://arduino.cc/en/Main/ArduinoBoardDuemilanove and they are immediately available for shipment.

Oracle

I was kind of hoping the next release would fix the pin spacing problem with headers (using a second row to maintain shield compatibility).

It's still nice to see that development is continuing on the core product line though.  

follower

Quote
I was kind of hoping the next release would fix the pin spacing problem with headers (using a second row to maintain shield compatibility).

I realise this is a re-hash but I don't expect to see a revised pinout until there's a "next generation" board that also requires some other electrical or physical incompatibility in its design.

--Phil.

MikMo

What is the difference between this board and the previous version ??

madworm

#6
Oct 21, 2008, 02:26 pm Last Edit: Oct 21, 2008, 02:27 pm by madworm Reason: 1
things I could see in the schematic:

- auto power select using a comparator (3.3V from FTDI chip vs. power jack) and a P-channel FET .
- disable auto reset by cutting a trace instead of having to desolder an smd cap. (not as nice as a switch, but still a big improvement)
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Oracle

Quote
I realise this is a re-hash but I don't expect to see a revised pinout until there's a "next generation" board that also requires some other electrical or physical incompatibility in its design.


The beauty of Arduino is that shouldn't really be necessary.  Isn't this Arduino '09 still shield compatible all the way back to the serial version 2 (with female headers)?  Moving forward, the basic board shouldn't need to change that.  Even if they add io, it could just be an extension and old shields can fit on a subset of the pins.  Of course, we can't predict the future.

ckiick

I've been thinking about this.
Couldn't we make some kind of adapter, that goes between the Arduino spacing and standard spacing?  Both kinds, so you could use shields with perfboard and breadboard setups, and also to make it easy to clap a regular set of headers onto an Arduino.
How hard could it be* ?



* TM Famous Last Words, inc.
Chris J. Kiick
Robot builder and all around geek.

Oracle

I've thought about an adapter but it would basically be a full shield between the arduino and your perfboard shield, so it would be bulky and cost as much as a protoshield just for the adapter.

It's so much more elegant to use the seeeduino solution: http://www.seeedstudio.com/depot/seeeduino-v11-fully-assembled-arduino-compatible-p-114.html

It has a second optional row of headers right next to the standard ones, but with the spacing corrected.

I was just hoping for an official board with that feature so future shields could migrate to the new dimension.  It's nice to have the seeeduino option, but nobody's going to make a shield that's not compatable with the true arduino.

nkcelectronics

#10
Oct 22, 2008, 05:16 pm Last Edit: Oct 22, 2008, 10:40 pm by nkcelectronics Reason: 1
Actually I have... http://www.nkcelectronics.com/freeduino-protoboard-breakout-shield-arduino-compatible.html



I came up with this board by mistake, but it is a protoboard compatible shield after all...

The idea is that you pay for the compatibility once and re-use it many many times saving money using standard protoboards.

Advent

May I ask why the ATmega328 was not used on the Duemilanove?

kg4wsv

#12
Oct 23, 2008, 04:35 pm Last Edit: Oct 23, 2008, 04:36 pm by kg4wsv Reason: 1
I would guess that the 328 was not available when the Duemilanove was in development.  It only recently started shipping.

-j


nkcelectronics

It started a very limited shipping, but now availability slipped to December, so probably ATMEL found some bugs or they are experiencing manufacturing delays / problems.

westfw

Quote
May I ask why the ATmega328 was not used on the Duemilanove?

I would sorta suspect that it was supposed to use the 328, but the 328 turned out not to be available enough.  (While some vendors now have a limited supply of ATmega328 chips, it's still not a part listed as "in stock" at any of the usual distributors.)

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