Message to the 8 people that have ordered my book, MORE FUN WITH DIGI COMP I: Since the first printing I have edited, refined, and streamlined several pages of...
I just wanted to let the group know that there is an original plastic Digi-Comp 1 for sale on eBay, listed in category: Toys & Hobbies > Vintage, Antique Toys...
Ok, Im sure everyones already thought of this, but I gave in and decided to build a mechanical computer. Yes the terms a bit broad for what I want to...
A mechanical computer is definitely on my "to do" list also. If all you want is addition and subtraction, the Digi-Comp II may be all you need. It also does...
This is not practical to build at home, but search ebay for "CURTA". This is a mechanical computer about the size of a soda can that can add, subtract,...
... My opinion is that you should set up a webpage with a project diary (with plenty of pictures) so that we can all vicariously enjoy the experience. ...
I don't have the skills to build such a thing myself but I'd sure love to see one! I was thinking about how you could build a mechanical equivalent of a CPU,...
You'll have lots of company! I've been planning to do the same thing. The DigiComp2 really intrigues me but looks complicated to build... so perhaps just...
... decided to build a mechanical computer. Yes the terms a bit broad for what I want to construct. ... do addition, subtraction. ... math, as well as basic...
... How about a fully mechanical special-purpose game playing machine? http://www.rci.rutgers.edu/~cfs/472_html/Intro/TinkertoyComputer/TinkerToy.html...
Some years ago I started to build a larger version of Digi Comp I using plexiglass sheet. I pasted together full-size copies of the DCI plate drawings to make...
... I have long been interested in mechanical computation, and have done some research into different designs. Recently I found this page with some mechanisms...
... Lest one be a bit daunted by the ball integrator, many snowblower drive mechanisms are essentially the same thing. On mine, the crankshaft spins a metal...
... That is probably the machine built by Lord Kelvin, actually. I read that it was in active use until the 1960s! This little machine has been making the...
What is the purpose for varying sized marbles? Other engineers and I have not been able to make the "marble = current" analogy work very far. In DCII, marbles...
Thanks for the great references showing variations on marble flops and their use. I glanced at your drawing and had a concern that there wasn't an obvious ...
The difference engine was digital and decimal. If Babbage had used binary and marble flops he could have built the machine on time and under budget. He could...
... binary ... budget. He ... different ... It's not that Babbage was on the wrong track. Omongst other things, Babbage was just too much of a perfectionist....
It occurs to me that one could use the Big Blue Saw ( http://www.bigbluesaw.com/ ) to get pieces for a Digi-Comp I precision-cut out of thin sheets of...
... I would essentialy be using a small marble, and a large one, becuase I want objects as close in representation to electrons as possible; also with...
As far as I know, you'll be exploring new territory with the two marble sizes. I hope you'll keep us informed of your progress. Here's a concept to consider;...
A very nice animation of the difference engine's printer. Apparently created for the science museum. http://www.indigoprojects.com/project.aspx?projectid=37...
I can also provide "More Fun with Digi Comp I" as a CD-R. Same price. Then you get all of the clip art in color. Ask for details or to see the Table of...
I am interested in obtaining detailed images of the DIGI-COMP 2 and any measurements. If there is one someone is willing to let go I would be willing to...
Hello everybody, I am new to this group. I love old computers (I have started my "career" in the 80's with 8 bits home computers), and get to know this group...
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