Wow indeed. Edmund C. Berkeley was a fascinating individual. He wrote one the first books on electronic computers, Giant Brains, or Machines That Think, in ...
... David, I have an old Pickett slide rule, all aluminum. I use a new synthethic grease (very light) called TW-25B. It's amazing, no binding at all (sells in...
I don't understand why he's using so many relays. My suggestion is that most of the relays are used for decoding the conductor-rings on the numbered disks....
Has anyone ever implemented the Digi-Comp logic in relays? I was looking at the 'Digi-Comp as a registered PLA' diagram and trying to figure out how it might...
I don't think I'd try building DC1 with less than 3 SPST and 3 DPDT. I'd wire the relays to latch themselves in a master/slave arrangement and use a VERY ...
I was even more impressed that Zuse built the first mechanical binary computer. http://www.epemag.com/zuse/part3a.htm Bob S. In a message dated 2/1/2005...
... Relays? Hah! When I was a kid we had to implement our computers in vacuum tubes! Both ways to school, in the snow, without shoes. You kids have it easy!...
I didn't understand how it was built using "thin metal sheets" instead of relays: "The Z1 did not use relays, but instead consisted completely of thin metal...
I cleaned the drawings a bit and submitted them to a fabricator for a quote in three different materials all LASER cut: 0.125" clear acrylic: $165.50...
... For just one set. I assume that if I have multiples made that they will not recharge the setup fee. In quantities I can probably negotiate a lower job...
Noah, Is Monterey close enough? I will probably be traveling to Santa Clara in the next two weeks. Shipping would be faster unless you drop by. Does anyone...
It was hard getting details. I wrote to Konrad's son Horst in Germany. He generously sent me a technical manual describing the Z1 and it's history. It's all...
Bob, If you get a chance look at the file I posted called "First cut at designing a relay-based simulator.' I've traced a few of the problems in the manual...
Some may find this interesting: http://www.noah.org/science/sci_am_digital_logic/ This is a collection of articles from Scientific American's Amateur Scientist...
... Wow. I actually built one of those water-based flip flops in 1971 or so, in my high school chemistry lab, after reading that article in Scientific...
Thanks Noah for posting those Amateur Scientist articles. I've got the CD but had overlooked Stong's 1962 article on liquid logic. Those who are further...
I remember trying to make the water-based flip flops in high school. My liquid logic never worked :-( I never quite got the nack for making those nozzles! This...
Diodes! I think that's cheating. Looks like it would work. The "Y" shaped "OR" link would be a couple of diodes with cathodes shorted. That would form an...
I posted the SR flip flop circuit also - put both drawings in a folder. The flip-flop isn't original, I got it out of a book. It looks like it would initialize...
Friends, A few days ago I proposed casting duplicates of DC1 with polyurethane mold material and casting with pourable plastic. I made one piece and posted a...
The flip-flop drawing is actually an "R/S latch with enable." When C is active, the R and S inputs directly control the outputs. When C goes inactive, the...
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