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<div class="moz-cite-prefix">I'm... I'm blown away. YOU guys think
MY stuff is awesome...? Holy <i>crap</i>. I'm the smallest fry in
the bin.<br>
<br>
I've got a lifetime total of maybe an hour of futzing with
microcontrollers -- and I'm being generous there! 90% of what I
know how to make is discrete logic or transistors-only or relay
crap. Probably my most complicated circuit ever is a relay
adder-subtracter that has a rotary phone dial as input. (Never
have been able to build it -- I'm actually fairly poor so being
able to build anything is an event of near-legendary
proportions...)<br>
<br>
Seriously. I'm the sort of electronics hobbyist that has to look
up circuits on the 'Net and then tweak them or combine them to get
what I want. I'm not sure I'm even qualifiable as "little league"
here -- I'm the hardware equivalent of a script kiddie, maybe. I
think I might actually be a level or two below that...<br>
<br>
The schematics that you say are "awesome" are a combination of six
parts Wikipedia, five parts general Internet (with tweaking), one
part pinouts[dot]ru, one part from a Forrest Mims book, three
parts sheer unadulterated guesswork, and two parts straight off
the EOMA-68 wiki page. I can't say myself if it's awesome or not,
but to me it looks like a total kludge :P<br>
<br>
Oh yeah -- one idea I had to make assembly even easier (definitely
need a PCB for this, hand wiring it would be a nightmare) --
socket the R-2R ladders -- so one DIP-16 socket for the input 2Rs
and another for the column of Rs and the 2R at the end. Makes
things more compact, and it's super easy to replace resistors if
they're faulty someday.<br>
<br>
If you can link me to the Olimex schematic, I can try to
understand it and adapt it, but I'm not promising anything. I'm a
very visual person so words describing it will probably not work
anywhere near as well -- I'll probably just be extremely confused.
I can look up pinouts and read datasheets and put it together like
a jigsaw puzzle in my head, and that's the best way for me 'cause
that's what I'm used to ;)<br>
<br>
On 10/16/2013 5:02 AM, luke.leighton wrote:<br>
</div>
<blockquote
cite="mid:CAPweEDxAgLmpJE9F4RMydFTdbSC3o+vEL=mvfDsCRxtfG1RyxQ@mail.gmail.com"
type="cite">
<pre wrap="">chris this is awesome. suggestion: if you have the experience and
knowledge could you look at selecting and designing in suitable
buffers on the RGB/TTL lines? there's a schematic from olimex which
does this (doesn't use R-2R uses 1x 2x 4x 8x etc. resistors) which i'd
like to use but it's an "attribution" license which is incompatible
with the GPL.
l.
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