Re: [neonixie-l] Re: Multiplexing noise
Perhaps you can post the code that does the multiplexing - it may shed some light on this issue. By the way, there's nothing wrong with multiplexing - and it's not that hard to get it right, just follow a few simple rules like the dead time, and you also haven't mentioned the frequency yet, which should probably be around 200Hz (you may have set it too high). In my opinion it's a complete waste of drivers not to multiplex, especially with a relatively high duty cycle, like 1/3 (e.g. when you have 6 tubes and you switch 2 at a time). Yours is 1/6, so you need to overdrive the tube a bit more, but other than that there's nothing wrong with it. On Wednesday, February 25, 2015 at 12:45:43 PM UTC+1, joenixie wrote: Hmmm... interesting observation Pete, are you talking about changing R21 or R22 to 10K? I chose 100K because I have them in my NixieNeon clock. -joe On Wed, Feb 25, 2015 at 2:48 AM, petehand pete...@gmail.com javascript: wrote: Just move R22 etc to the other end of R21 etc, on the base of the PNPs. Where they are now, those resistors are are doing nothing but wasting power. When the NPNs turn on they're going to draw 1.6mA and drop 160V across the 100k resistors R21 etc. You need no more than 3V to turn on the PNPs, so in theory you could drop the values of R22 etc to 2.2k, but I suggest 10k is more suitable. 100k is way too high and may as well not be there. -- 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+...@googlegroups.com javascript:. To post to this group, send email to neoni...@googlegroups.com javascript:. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/77035e01-fd3f-4085-bc63-83deae194f39%40googlegroups.com https://groups.google.com/d/msgid/neonixie-l/77035e01-fd3f-4085-bc63-83deae194f39%40googlegroups.com?utm_medium=emailutm_source=footer . For more options, visit https://groups.google.com/d/optout. -- 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 post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/2775309b-3b58-4591-9578-f986c12adc57%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [neonixie-l] Re: For Steampunk Nixie Clock Fans..
OT still, but... there are web hits for Vampire with IFF and Radar. [Country vs year vs model etc though.] BTW, the Rebecca is part of an interrogator system; Rebecca finds the Eureka. The system can be employed as a DME. I am 'restoring' a Rebecca IV. The IV was the British test bed for the miniature 7-pin valves (and other miniaturisations). John K Australia - Original Message - From: Paul Parry To: neonixie-l@googlegroups.com Sent: Wednesday, February 25, 2015 6:58 PM Subject: Re: [neonixie-l] Re: For Steampunk Nixie Clock Fans.. XD515 was in very poor condition, it used to live at Newark Air museum under the wing of a Vulcan - outdoors and with a massive hole in the side of the cockpit the size of a dustbin lid. Newark scrapped the plane off, and my friend Erik purchased it for scrap value with a view of restoring it as a retirement project as he worked on them in the RAF many years ago. Over 2 years Erik dismantled the plane on site and brought it home bit by bit in his car and on a trailer, and started work on it. The fuselage is wooden, the same as a Mosquito, so he completely replace the side with the hole in as it would have originally been done by DeHavilland. I joined him on the project a few years later and I worked on the electrical systems, with a view to getting it to power up. I got the rotary inverters going, and a lot of the instrumentation functional. Sadly though Erik developed emphaceama and passed away, and he left me the plane as an on-going concern. I was not in the position to take the plane from Erik's house, or had the room myself to house it all, I already had the Goblin Engine in my garage along with the rear fuselage, no room for wings and cockpit so it ended up as a collection of parts at RAF Cosford, where I hope they will put it back together as it is all there and put it on display. At least it is in the right place, and they have the facilities and room to put it back together. I don't think the Vampire had any IFF system, there was a very early radar fitted (Rebecca) that used little antennas on the wings and tails but that is advanced as it got, little G4F compass system and that was about it. The engine starting mechanism / timer was clockwork which made me smile. Never heard of the TabbyF system, makes interesting reading though! -- 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 post to this group, send email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/f33c1efc-1967-431a-abd3-336d8cd9a37e%40googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- 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 post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/535BE2985146456BB0CEA4F288FA08C2%40compunet4f9da9. For more options, visit https://groups.google.com/d/optout.
Re: [neonixie-l] Re: For Steampunk Nixie Clock Fans..
On Wednesday, 25 February 2015 14:25:33 UTC, johnk wrote: OT still, but... there are web hits for Vampire with IFF and Radar. [Country vs year vs model etc though.] BTW, the Rebecca is part of an interrogator system; Rebecca finds the Eureka. The system can be employed as a DME. I am 'restoring' a Rebecca IV. The IV was the British test bed for the miniature 7-pin valves (and other miniaturisations) Are you familiar with the wonderful work of Tatjana J. van Vark ? See http://www.tatjavanvark.nl/tvve/dduck0.html - Not only did she rebuild a complete H2S, replacing all the missing bits she needed herself, she also designed and built a miniature version from scratch - http://www.tatjavanvark.nl/tvv4/radarind.html http://www.tatjavanvark.nl/tvv4/radarind.html. Her whole site is a thing of beauty/wonderment ! http://www.tatjavanvark.nl/ Nick (*) The H2S runs in her house! http://www.tatjavanvark.nl/tvve/dduck7.html http://www.tatjavanvark.nl/tvve/dduck7.html -- 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 post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/f8a64663-0a06-4f03-b38f-902a29f50306%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [neonixie-l] Re: For Steampunk Nixie Clock Fans..
Yes, but thanks for reminding me; it has been quite a while since I refreshed my memory. And there is new to me content in those links ! Thanks. I have been green with envy for all the Vulcun stuff [as a kid I had a walk-through of a Vulcan at an airshow here and was delighted to see one in flight during a visit to the UK in 1980.] John K - Original Message - From: Nick To: neonixie-l@googlegroups.com Sent: Thursday, February 26, 2015 1:17 AM Subject: Re: [neonixie-l] Re: For Steampunk Nixie Clock Fans.. On Wednesday, 25 February 2015 14:25:33 UTC, johnk wrote: OT still, but... there are web hits for Vampire with IFF and Radar. [Country vs year vs model etc though.] BTW, the Rebecca is part of an interrogator system; Rebecca finds the Eureka. The system can be employed as a DME. I am 'restoring' a Rebecca IV. The IV was the British test bed for the miniature 7-pin valves (and other miniaturisations) Are you familiar with the wonderful work of Tatjana J. van Vark ? See http://www.tatjavanvark.nl/tvve/dduck0.html - Not only did she rebuild a complete H2S, replacing all the missing bits she needed herself, she also designed and built a miniature version from scratch - http://www.tatjavanvark.nl/tvv4/radarind.html . Her whole site is a thing of beauty/wonderment ! http://www.tatjavanvark.nl/ Nick (*) The H2S runs in her house! http://www.tatjavanvark.nl/tvve/dduck7.html -- 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 post to this group, send email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/f8a64663-0a06-4f03-b38f-902a29f50306%40googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- 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 post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/ACD8C9360A104F5D92EAF1ED45E1DEA2%40compunet4f9da9. For more options, visit https://groups.google.com/d/optout.
RE: [neonixie-l] IN-18 Modular Arduino clock layout updated
While I know that you don't care for LED backlighting, many of the designs I've seen use (2) per IN-18 with one on each side of the tube seal for best effect. You appear to have more than enough room for that. Very nice boards! Jeff From: neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] Sent: Wednesday, February 25, 2015 8:34 PM To: neonixie-l@googlegroups.com Subject: [neonixie-l] IN-18 Modular Arduino clock layout updated Ok, John shamed me into tweaking the layout. Here's the latest revs. I did address the lines crossing the hole keepouts, as well as rationalizing out a whole bunch of vias. My criteria for a clean design includes as few as possible jogs in the traces, minimal number of vias within reason, and an adherence to x on one layer and y on the other until the routing is done, then around the margins, it becomes OK to violate that rule. Symmetrical layouts of repeated circuitry. Also only 45 degree bends, (90 or 45 at vias OK) clean pad entry, (no acid traps), trace widths no narrower than the design justifies... very conservative rules. Makes for high yields and reliable boards. Anyway, now I'm pretty happy with both of these boards, and after some careful design validation, I'll be ready to order boards. So your feedback, please. Thanks, Terry https://lh3.googleusercontent.com/-CN1uD7heTcc/VO6FCAJkq0I/ADg/4EdQtsuu8bA/s1600/main.JPG https://lh3.googleusercontent.com/-pSKnky0S_lk/VO6FL0FteYI/ADo/Xt71tF6X8jQ/s1600/extension.JPG -- 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 post to this group, send email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/44df85be-01c4-4df7-bed6-1959abe369de%40googlegroups.com https://groups.google.com/d/msgid/neonixie-l/44df85be-01c4-4df7-bed6-1959abe369de%40googlegroups.com?utm_medium=emailutm_source=footer . For more options, visit https://groups.google.com/d/optout. -- 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 post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/54ee8d52.88196b0a.5a63.dd20%40mx.google.com. For more options, visit https://groups.google.com/d/optout.
[neonixie-l] IN-18 Modular Arduino clock layout updated
Ok, John shamed me into tweaking the layout. Here's the latest revs. I did address the lines crossing the hole keepouts, as well as rationalizing out a whole bunch of vias. My criteria for a clean design includes as few as possible jogs in the traces, minimal number of vias within reason, and an adherence to x on one layer and y on the other until the routing is done, then around the margins, it becomes OK to violate that rule. Symmetrical layouts of repeated circuitry. Also only 45 degree bends, (90 or 45 at vias OK) clean pad entry, (no acid traps), trace widths no narrower than the design justifies... very conservative rules. Makes for high yields and reliable boards. Anyway, now I'm pretty happy with both of these boards, and after some careful design validation, I'll be ready to order boards. So your feedback, please. Thanks, Terry https://lh3.googleusercontent.com/-CN1uD7heTcc/VO6FCAJkq0I/ADg/4EdQtsuu8bA/s1600/main.JPG https://lh3.googleusercontent.com/-pSKnky0S_lk/VO6FL0FteYI/ADo/Xt71tF6X8jQ/s1600/extension.JPG -- 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 post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/44df85be-01c4-4df7-bed6-1959abe369de%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [neonixie-l] IN-18 Modular Arduino clock layout updated
The PV electronics IN18 clocks (old style now) use 3x1206(?) type LED's under each tube. Much as some people don't like them, I find a nice orange LED complements the neon glow quite well...they can also make great night lights when the tubes are shut down at night...;-) Nick On Wed, Feb 25, 2015 at 7:04 PM, Jeff Walton jwalton...@gmail.com wrote: While I know that you don't care for LED backlighting, many of the designs I've seen use (2) per IN-18 with one on each side of the tube seal for best effect. You appear to have more than enough room for that. Very nice boards! Jeff *From:* neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] *Sent:* Wednesday, February 25, 2015 8:34 PM *To:* neonixie-l@googlegroups.com *Subject:* [neonixie-l] IN-18 Modular Arduino clock layout updated Ok, John shamed me into tweaking the layout. Here's the latest revs. I did address the lines crossing the hole keepouts, as well as rationalizing out a whole bunch of vias. My criteria for a clean design includes as few as possible jogs in the traces, minimal number of vias within reason, and an adherence to x on one layer and y on the other until the routing is done, then around the margins, it becomes OK to violate that rule. Symmetrical layouts of repeated circuitry. Also only 45 degree bends, (90 or 45 at vias OK) clean pad entry, (no acid traps), trace widths no narrower than the design justifies... very conservative rules. Makes for high yields and reliable boards. Anyway, now I'm pretty happy with both of these boards, and after some careful design validation, I'll be ready to order boards. So your feedback, please. Thanks, Terry https://lh3.googleusercontent.com/-CN1uD7heTcc/VO6FCAJkq0I/ADg/4EdQtsuu8bA/s1600/main.JPG https://lh3.googleusercontent.com/-pSKnky0S_lk/VO6FL0FteYI/ADo/Xt71tF6X8jQ/s1600/extension.JPG -- 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 post to this group, send email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/44df85be-01c4-4df7-bed6-1959abe369de%40googlegroups.com https://groups.google.com/d/msgid/neonixie-l/44df85be-01c4-4df7-bed6-1959abe369de%40googlegroups.com?utm_medium=emailutm_source=footer . For more options, visit https://groups.google.com/d/optout. -- 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 post to this group, send email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/54ee8d52.88196b0a.5a63.dd20%40mx.google.com https://groups.google.com/d/msgid/neonixie-l/54ee8d52.88196b0a.5a63.dd20%40mx.google.com?utm_medium=emailutm_source=footer . For more options, visit https://groups.google.com/d/optout. -- 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 post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CAOX%2BRHJ5ppX3w5LeFCUd1Qr70SR1WNq5JaSo5jvNZ8n3z9nByQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
[neonixie-l] Re: Multiplexing noise
Just move R22 etc to the other end of R21 etc, on the base of the PNPs. Where they are now, those resistors are are doing nothing but wasting power. When the NPNs turn on they're going to draw 1.6mA and drop 160V across the 100k resistors R21 etc. You need no more than 3V to turn on the PNPs, so in theory you could drop the values of R22 etc to 2.2k, but I suggest 10k is more suitable. 100k is way too high and may as well not be there. -- 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 post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/77035e01-fd3f-4085-bc63-83deae194f39%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
