I am interested in building a "selector" gadget for devices that take
jumpers
to select a program, such as this game cartridge where you have 5
jumpers
to select program #0-31 (the jumpers represent the binary number):

http://www.retroblast.com/Misc/Vectrex.php
http://www.retroblast.com/images/storie ... eview%20(4).JPG
http://www.retroblast.com/images/storie ... view%20(12).JPG

The selector would have two 7-segment LEDs that display the currently
selected program number (0-31), and a couple pushbuttons (+/-) that
let you
increase/decrease the program #. The device translates the number
into
binary and turns on/off the appropriate switches or relays which are
attached to the jumpers on the device (ie the above game cartridge).

Or I would even like to build a kind of analog to digital converter
device which has a potentiometer (for example 100k) which gets
translated
into an 8-bit number (0-255) and 8 switches get opened/closed that
represent the value of the pot. Adding three 7-segment LEDs to
display
the current value in decimal would be cool and then it could be used
as a "selector" as well.

Does anyone know of any plans or schematics out on the Web to
construct
something like these? (For now I just wire switches to the jumpers.)

Thanks.

bill.sloman@ieee.org wrote:
>
> If I simplified the message enough for you to comprehend it, I'd bore
> the bulk of my audience, and there wouldn't be much message left ...


'Your audience' is waiting by himself in an Interstate Highway rest
room for his next gay sex partner.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

bill.sloman@ieee.org wrote:
>
> On Jan 28, 9:38 pm, "Michael A. Terrell" <mike.terr...@earthlink.net>
> wrote:
> > bill.slo...@ieee.org wrote:
> >
> > > If I simplified the message enough for you to comprehend it, I'd bore
> > > the bulk of my audience, and there wouldn't be much message left ...
> >
> > 'Your audience' is waiting by himself in an Interstate Highway rest
> > room for his next gay sex partner.
>
> Since you've responded to the post, you are - by definition - part of
> the audience, as is John Fields.
>
> Obviously, you can speak for yourself, but you may be traducing John.
>
> --
> Bill Sloman, Nijmegen



Only becasue it was crosposted to a newsgroup where I didn't have you
kill filed, but that is being take....................
--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida