On 7/14/11 9:05 PM, neutron spin wrote:
Yes for the IN-17 design AVR would be my choice. I believe the AVR
Tiny series are made in surface mount packages. Sandwich construction
(Tube board stacked) and controller using mostly surface mount parts.
This would accomplish two of my objectives.....to make a small
footprint nixie clock and hone my skills with surface mount
construction. I have Eagle to do the layout and I am average on the
use of it. This is sounding more like a doable project. Another
dream of mine is to totally encapsulate the clock in clear casting
resin with only the power jack and pushbuttons accessable. there may
be heat issues but a totally (almost) encapsulated clock that could be
dropped without damage...I remember a light brick design that was a
solid brick of resin with LED's inside...of course if any component
failed... bye bye clock...what a waste of nixies....crazy idea....are
there any good reference documents that cover
"Charlieplexing"?...thanks again
Regards
Robert
I did such a design last summer, and even got a few boards made, but I
never got around to building it. Crazy!
I used a 44 pin PIC quad flat pack and four of the tiny TD62083 drivers
I use in my 2 digit nixie watch.
I cheated a bit and used a neon tube for the leftmost '1' digit, since
it's smaller.
The whole design is the size of the IN-17 tubes, and just as thick as
they are with their plastic spacers. But there's a CR2 lithium battery
behind it to provide power. I take off the tube spacers and use tiny
socket pins. The tube board has holes for the tube nipples to poke
through. The second board in the stack has all the chips.
http://www.cathodecorner.com/nw35/NWDAart.pdf
http://www.cathodecorner.com/nw35/NWDAschem.pdf
Source code is not written, but is a modification of my 2-digit Nixie watch.
--
David Forbes, Tucson AZ
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