Hi Maybe a system using a rotary electrical machine synchronous to the power line driving a system of gears. and pointers on a dial
If the transistor clock is worth $200, I should be able to sell something like that for $400. Throw in the alarm buzzer feature and it could go for $600... Off to Walmart to stock up and make my fortune .... Bob On Jan 9, 2010, at 10:30 AM, Lux, Jim (337C) wrote: > > > > On 1/9/10 12:09 AM, "Steve Rooke" <sar10...@gmail.com> wrote: > > 2010/1/9 Tom Clifton <kc0...@yahoo.com>: >> http://transistorclock.com/ has a very interesting (though a bit expensive) >> kit for sale. A 10" x 11" circuit board sporting nearly 200 transistors and >> 600 diodes to drive six seven-segment displays. Suitable for framing... As >> delivered runs on 60hz but there is a note about conversion to 50hz mains. >> You can buy a bare board, just the components or a full kit. >> >> You must see it to believe it! > > Bah humbug! Stupid modern day design, it'll never be any good, you > need to use valves to make real gear :-) > > Well, they do make dual triodes which are convenient for making those > Eccles-Jordan circuits. > > I can't help wondering if you go do better than the 4 bit counter:4-10 > decoder:10-7 decoder. Yeah, simple diode matrices in an AOI configuration > are easy, but surely a bit of work (as in digging up archaic designs) could > find a "lower part count" approach. Time to use that Karnaugh map. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
