Re: [neonixie-l] Dekatron Analog Meter with Analog Parts
> On Aug 11, 2021, at 6:45 AM, Alex wrote: > > I can work out various bits but, for instance, the lower op-amp stage leaves > me pondering... > > Always love it when a service manual has a "Circuit Theory" or "Principles of > operation" section adjacent to the schematic What I like are schematics that I can "read". Despite being visually compromised I've always been able to "acquire" visual information more rapidly than most people with 20/20 eyesight. In High School I could read 1000 words per minute. These days not so much. Mike's schematics are GREAT and his use of color is a rare thing. They're rather busy due to the use of so many discrete components so this really helps. I use color all the time for outlines, spreadsheets and databases. It helps me immensely. The worst thing about Eagle is the schematic line art. Too small with too much white space around everything. European schematics that use rectangles instead of the resistor symbol are a problem for me. My visual system can just deal with it as long as the values are in the boxes. I've schematics that have them outside the box and that simply doesn't work for me. The service manual for the RadioShack MG-1 analog synthesizer is a work of art (the whole manual, not just the schematics and block diagrams). It's work looking at even if you don't know what I'm talking about. A model for us all. Terry Bowman, KA4HJH "The Mac Doctor" "If only you could see what I've seen with your eyes."—Roy Batty, Blade Runner -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CA5EA4C3-15E8-4A57-9179-6F3EA69C9508%40gmail.com.
Re: [neonixie-l] Re: Dekatron Analog Meter with Analog Parts
Having it mimick the dohickie, would require a toggle flip flop, to switch directions on alternate counts. It could be either a descrete 2 transistor stage, with associate resistors and caps, or a chip such as a 4013. Making respond to stereo would also mean ping-pong-ing between two audio channels. definitely turning into a "Rube Goldberg" contraption. If I ever decide to go that route, using a uC would be the simple way out. Just add another audio input stage to the current doHickie. It already has analog switching internal to a Tiny24 uC. The "fun" way, would be to use only tubes. Descrete circuit, only using tubes. Maybe in the future ... On Tuesday, August 10, 2021 at 1:55:15 AM UTC-7 Dekatron42 wrote: > Lovely! > > Would it be possible to add the same circuit twice but change the spin > direction to get a simulat display to the original one where it swings both > eays, I think some kind of multiplexong is needed then so that only one > driving stage at the time drives the guides? > > This might also make it possible to display both right and left audio > signal on the same dekatron. > > /Martin > > On Monday, 9 August 2021 at 23:36:26 UTC+2 Terry Bowman wrote: > >> >> On Aug 9, 2021, at 3:44 PM, threeneurons wrote: >> >> Idler circuit added. >> >> >> Great stuff, Mike. Keep it up. >> >> >> Terry Bowman, KA4HJH >> "The Mac Doctor" >> >> https://www.astarcloseup.com >> >> “...the book said something astonishing, a very big thought. The stars, >> it said, were suns but very far away. The Sun was a star but close >> up.”—Carl Sagan, "The Backbone Of Night", *Cosmos*, 1980 >> >> >> -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/f4bf4419-4a6c-4fe8-96b7-65d327da0ca0n%40googlegroups.com.
[neonixie-l] Re: Dekatron Analog Meter with Analog Parts
In the video "threeneurons" explains some of the information you are asking for, and there are small texts beside the different stages like AUDIO, RAMP, 800HZ, /RST, RTN, /G1 & /G2 that corresponds to the video explanation. /Martin On Wednesday, 11 August 2021 at 12:45:59 UTC+2 Alex wrote: > This is a really nice design from a analogue electronic theory standpoint, > something which I always have to work fairly hard to try and get my head > around. > > What would be really great would be if you could give an overview (just a > fairly high level of each of the blocks / op-amp stages) into what each > section does? > > I can work out various bits but, for instance, the lower op-amp stage > leaves me pondering... > > Always love it when a service manual has a "Circuit Theory" or "Principles > of operation" section adjacent to the schematic, gives you the opportunity > to just sit and get your head around something your repairing. I have just > finished recapping, retrimming and tidying up my old Thurlby PL series > supplies and the design for that can be a bit uncouth in some areas... > > Impressive stuff though, I would not know where to start (probably with a > micro in todays world, sadly...) > > - Alex > > On Friday, 6 August 2021 at 05:36:07 UTC+1 threeneurons wrote: > >> I designed my "Dekatron DoHickie" over 10 years ago. It uses a AVR Tiny24 >> microcontroller, to sample analog data, thru its ADC, then send a >> appropriate number of pulses to a dekatron, so that the tube mimics, a >> magic eye. Though cost effective in the modern era, like many old farts, >> using a microcontroller on all projects, just rubs me the wrong way. >> >> I wondered, if I could pull it off with a simpler circuit. Here's what I >> came up with, that uses a "Jelly Bean" LM324, and a bunch of descrete parts: >> > ... >> > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/eb0b19f8-255f-46b1-bff0-f43c131114a0n%40googlegroups.com.
[neonixie-l] Re: Dekatron Analog Meter with Analog Parts
This is a really nice design from a analogue electronic theory standpoint, something which I always have to work fairly hard to try and get my head around. What would be really great would be if you could give an overview (just a fairly high level of each of the blocks / op-amp stages) into what each section does? I can work out various bits but, for instance, the lower op-amp stage leaves me pondering... Always love it when a service manual has a "Circuit Theory" or "Principles of operation" section adjacent to the schematic, gives you the opportunity to just sit and get your head around something your repairing. I have just finished recapping, retrimming and tidying up my old Thurlby PL series supplies and the design for that can be a bit uncouth in some areas... Impressive stuff though, I would not know where to start (probably with a micro in todays world, sadly...) - Alex On Friday, 6 August 2021 at 05:36:07 UTC+1 threeneurons wrote: > I designed my "Dekatron DoHickie" over 10 years ago. It uses a AVR Tiny24 > microcontroller, to sample analog data, thru its ADC, then send a > appropriate number of pulses to a dekatron, so that the tube mimics, a > magic eye. Though cost effective in the modern era, like many old farts, > using a microcontroller on all projects, just rubs me the wrong way. > > I wondered, if I could pull it off with a simpler circuit. Here's what I > came up with, that uses a "Jelly Bean" LM324, and a bunch of descrete parts: > ... > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/27f35e81-8aaf-4c76-8ff5-97685b0d32b1n%40googlegroups.com.
