BeagleBoard Daughterboard

Hi,

I'm in the process of designing a daughterboard for the beagleboard. I
was wondering if anyone else is interested in this. The main purpose
will be to do the level conversion, which I think everyone is coming
up against.

Any feature ideas / interest in this? If I can get enough interest,
perhaps I could do a run of the PCBs + IC packs.

I'm contemplating rolling my own level converter, so I'd be interested
in understanding more details of what you want to build. Basically I
need access to an SPI and a serial (tx/rx) port. Since my application
calls for mostly dip socketed parts, and since all level converters
I've found are smt parts, I was going to use a smt to dip board to
convert 8 or 16 signals from the 28 pin connector. However, if you're
thinking of making a sort of "wedge" converting the 28pin connector to
another connector at 3.3v or 5v, this would be ideal for me. The only
issue is that my timeframe is sorta tight.

So you might ask why the heck would I want to use old technology (DIPs/
through hole) on a new project. Well, its a "one of" project, that
needs to be suitable for easy repair by relative non-techies. While I
personally can deal with SMT install/repair, most others in my group
can't. This board will be in service for 5-10 years, before we
upgrade again. Its going to be used as a repeater controller (amature
radio). We'll just purcase a spare beagleboard in case we have a
failure there. We could build spares for the additional IO too, but
I want to stay flexible and be able to easily add features which might
mean I'd pull another signal or two off the expansion connector
sometime after the initial implementation.

So, a "wedge" level conveting board sounds like a good idea.

Kevin

a Nobel idea for some, how many who knows that is what you are seeking?
but remember to go through that much trouble would not be adequate
because you have no way to connect to the digital LCD data lines that
would make it control something useful like a 800x600 to 640x480 tft LCD
this would enable it to be a advanced hand held mobile proto-type
platform.
That has been my limitation from working with the board. Working with
the GPIO connector you can easely connect buttons with wire wrap pin
connectors and away you go. I would think just re-building the working
Gerbers to make a new revision of the beagle board to enable these
registers accessible would be the fix-all. but that is some thing that
TI relay should provide. I would suggest looking at the new omap3503
Gumstik kit for $149.00 for cpu module and $39.00 for break out board
this will enable you to make anything they were selling a lcd adapter
board with I think wifi antenna for $99 but are discontinuing the
product due to lagging sales people are having more success with the
cheep usb wifi sticks. how ever they give the gerbers for the board.
you could get the boards made at Advanced circuits for less that $200
I hope this can help Ive been down this road a million times...
if only we had all the time in the world :wink: good luck...

Tin Can Tools <http://www.tincantools.com/> are apparently working on
something like this. Plans are for level shifters & various analog &
digital peripherals. Check the archives of #beagle for more details.

Eric

...

Tin Can Tools <http://www.tincantools.com/> are apparently working on
something like this. Plans are for level shifters & various analog &
digital peripherals. Check the archives of #beagle for more details.

Eric

Hi,

Thanks for the heads up. I see the discussion you're talking about. Do
you have any ideas on the time frame / price they're thinking of? I
sort of want one "yesterday", so I think I'm going to end up rolling
my own anyway and doing one or two on a CNC.

Kevin Uhlir wrote:

I was going to use a smt to dip board to
convert 8 or 16 signals from the 28 pin connector. However, if you're
thinking of making a sort of "wedge" converting the 28pin connector to
another connector at 3.3v or 5v, this would be ideal for me. The only
issue is that my timeframe is sorta tight.

My plans were for a general purpose breakout / proto area / level
conversion, with perhaps some A/Ds. Depending on how quickly Tin Can
Tools make theirs, they may suit your (and my) requirements. Again, if
someone in the know can update me on their progress / timeframe, I'd
be happy.

Stewart

How about adding a real time clock? Thats been talked about a few times.
A few ideas here too:
emeb wrote:

Hi,

hex4def6 schrieb:

I'm in the process of designing a daughterboard for the beagleboard. I
was wondering if anyone else is interested in this. The main purpose
will be to do the level conversion, which I think everyone is coming
up against.

Any feature ideas / interest in this? If I can get enough interest,
perhaps I could do a run of the PCBs + IC packs.

yes that would be a good thing indeed. I plan to do something similar already,
but my free time to get this done is a little bit limited.
I guess the best would be a kind of prototype board for own extensions that
provides adjustable signal levels and maybe an additional power regulator for
applications that need much of power.
It might be a good idea to have connectors for some interfaces provided by the
connector (e.g. SPI, I2C and UART) and a microSD slot which should be easy to do
and quite cheap. Even if you can't use all at the same time people could attach
their extensions more easily.

Greetings

Florian