Photo Questions

From: Scott Stevens <chenmel_at_earthlink.net>
Date: Tue Jan 4 18:27:36 2005

On Tue, 4 Jan 2005 16:13:08 -0800 (PST)
aek_at_spies.com (Al Kossow) wrote:

>
> > Al, are you indicating that a) your copy of the book has been scanned
>
> correct. I'm not sure I'm comfortable with putting it on line, however.
>
> also, it is a VERY strange book. I pulled it out again just to refresh
> my memory about just exactly what they were trying to do with this project
>
> while you could consider it a 'computer', it is not an 'automatic computer'
>
> every switch (all those little things made from paper clips) are operated
> manually.
>

My Digi-Comp was all operated manually, back in aprox. 1970 when I had one.

The first _electornic_ computer I ever wanted to build was one that was basically a cascade of flip-flops made into an up counter. The input device was a telephone dial. For some reason, the author of the book designed it to use multiple big TO-3 package 2N3055 transistors per flip-flop stage, which priced it WAY out of my school-kid budget at the time. Looking back, it's pretty ridiculous that it wasn't designed around little cheap transistors, i.e. 2N2222 parts.

Yikes. Serious topic drift. Sorry.

-Scott
Received on Tue Jan 04 2005 - 18:27:36 GMT