I am, but when you talk about listening to the phone relays you just sound so old.... You know, not young and hip like us cool cats! Oh wait, now I sound old.
On Mon, Jul 23, 2018 at 4:04 PM <[email protected]> wrote: > Pretty sure you are right up there with me... > > *From:* Lewis Bergman > *Sent:* Monday, July 23, 2018 2:59 PM > *To:* AnimalFarm Microwave Users Group > *Subject:* Re: [AFMUG] OT Nixie tubes > > Chuck is so old > > On Mon, Jul 23, 2018 at 3:13 PM <[email protected]> wrote: > >> If I had nothing but time, I would build a relay based finite state >> machine to be the calculator. >> It would probably take a relay rack or two of relays. Even super tiny >> pcb mount relays would take some considerable room when you are chaining up >> half adders etc. >> >> I think some guy did this and built an 8080 CPU with relays. >> >> Back when I was considerably younger I enjoyed the sound of a North >> Electric relay panel interrogating a phone line to figure which person on >> the party line was making the call and then sending the digits via MF >> tones. You could diagnose the health of the machine by the sounds. >> >> *From:* Dave >> *Sent:* Monday, July 23, 2018 1:38 PM >> *To:* [email protected] >> *Subject:* Re: [AFMUG] OT Nixie tubes >> >> Dont get too complex until you have a functional calculator :) >> >> Sounds like a fun project vs my Galaga upright arcade restoration :) >> I also came across some Gas Filled 4x12" Displays that are dot matrix. >> They use 94V to power the Element. >> >> >> >> On 07/21/2018 04:04 PM, Chuck McCown wrote: >> >> Yes, I just found a source of old typewriter keys. I think I will >> connect them to microswitches for a nice tactile feedback. >> >> Analog volt meter showing the capacitor voltage. Will probably need a >> voltage doubler to get up to the 180 volts needed for the nixie tubes. >> >> Things start to dim, crank the crank a few turns. >> Do I want to use cloth covered wire and solder terminal sockets. At some >> point PCBs will have to be used. So I will probably get lazy and make a >> PCB for everything. >> >> Be fun to have some kind of mechanical annunciator showing the sign of >> the exponent. >> >> Prepper calculator. (Probably a raspberry pi in its heart). >> >> Maybe use a telephone ringer bell to announce the result. I could add >> some delay with the nixie tubes scrolling through the digits and one by one >> stopping on the digits of the solution. >> >> *From:* Chuck Macenski >> *Sent:* Saturday, July 21, 2018 2:50 PM >> *To:* [email protected] >> *Subject:* Re: [AFMUG] OT Nixie tubes >> >> Old silver and black typewriter keys. Think Enigma machine... >> >> On Sat, Jul 21, 2018 at 3:28 PM Chuck McCown <[email protected]> wrote: >> >>> I must be nuts. >>> I am working on a calculator project that uses nixie tubes for a display. >>> >>> I want to use a telephone magneto to charge up a cap to run the thing. >>> Kinda a steam punk RPN HP type of calculator. >>> I am stuck on what to use for buttons. I am thinking elevator buttons. >>> >>> Large oak case. Just crank it for 10 seconds and then do your >>> calculation. >>> >>> I am also conflicted as to how many buttons. >>> Square and square root for sure. >>> Undecided about log, trig functions and whether or not to have >>> scientific notation. I think I will. >>> How many digits to display? Probably 5. Engineering mode only. 3 dot >>> 2 display. >>> Also considering multiple lines to show 4 levels of the stack but I >>> doubt I will actually do that. >>> >>> The question is: will I ever finish this thing? >>> -- >>> AF mailing list >>> [email protected] >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >> ------------------------------ >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> >> >> >> -- >> >> ------------------------------ >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> > ------------------------------ > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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