Re: [Xylo-SDR] Some design thoughts requested

[Philip Covington <p.covington@gmail.com>]

On 1/5/06, Eric Ellison <ecellison@comcast.net> wrote:
>
> Do we want the raw power sources/Regulators on the MB?
> If so what powers and current do we want? (+/- 12 +5? Etc)
> How many boards plug into the MB? (along extruded rails)
> What should be the spacing between those boards?
> What are the logical projects we should work on.
>
> I'll lead:
>
> Yes power should be on MB +/- 12V 500 ma + 5 V 1 A.

Maybe the currents should be a little higher on each supply since it
will come from an external supply and we are not doing the regulation
on the motherboard... we just need to make sure the traces are sized
right.  I think each DIN connector can handle up to an amp or so...

> 3 or 4 boards.

At least, maybe we can come up with a way to plug motherboards
together to extend it in groups of 4 or something?  Two right angle
DIN (plug & receptacle) connectors could handle that.

> .75 inch between boards.

Sounds ok.

> Projects:
>
> 1. FPGA board + HS USB
> 2. Super high accuracy Timebase/OSC source.
> 3. Audio processing board.
> 4. Software Defined Radio Board.

IO Interface... AD9954 board...  PLL board... etc... etc... LOL

73 de Phil N8VB