[neonixie-l] Re: Finished Nixie Watch project (Pictures)

That is great. I plan to make a portable 6 tube clock using some Z5900 tubes, so seeing details of how someone addressed the power issues is really useful. On Friday, February 3, 2017 at 12:44:43 PM UTC-5, Craig Smith wrote: > > I thought I would post a few pictures of my finished Nixie watch

[neonixie-l] Mounting IN-18 tubes

Hi, Does anyone have any suggestions about how to mount IN-18 tubes? It looks like they are intended to be socketed and I see some sockets/pins on ebay. I would like to underlight them too, if that makes a difference. By the way, does anyone have CAD files for the physical pin layout? e.g DXF

Re: [neonixie-l] Re: Mounting IN-18 tubes

Are there specific socket pins that I can try and source? > On Feb 7, 2017, at 10:08 AM, gregebert wrote: > > I use socket pins soldered into the PCB. Yes, there's also a hole in the PCB > for the nib. > The socket pins are low-insertion force, so it's very easy to

Re: [neonixie-l] Re: Mounting IN-18 tubes

Thanks. I ordered some pins. Can anyone tell me the thickness of the acrylic disks that PV electronics use? I am about to order some acrylic pieces for something else so it would be good to get a few disk prototypes made. -- You received this message because you are subscribed to the Google

[neonixie-l] Re: Finished Nixie Watch project (Pictures)

Thanks. I figure I have a lot of research ahead. My intention, at the moment, is to create something that will fit in a purse and/or luggage (not that I plan on taking it anywhere when it's done)! Something no bigger than a cigar case, possibly smaller. The details on this watch (the

[neonixie-l] Re: black box from Czech Republic

Wow. Didn't know about those CD47s. Still saving my pennies for a Zen clock. On Friday, January 20, 2017 at 4:58:42 AM UTC-5, newxito wrote: > > Yesterday I got a really nice black box from the Czech Republic, serial > numbers around 1300. > > I’m looking forward to build my second clock, I will

[neonixie-l] Re: Wifi adapter for NCS314

lugged in, but not interfere with the programmer when it isn't. On Saturday, January 21, 2017 at 6:32:39 AM UTC-5, Paul Andrews wrote: > > Hi > > I've been working on a project to add a wifi interface to my NCS314 clock. > This clock is an Arduino shield, so it sho

[neonixie-l] Tube testing?

Hi, I received a shipment of tubes (Z5900M) that I want to fire up (becasue, you know, I want to see them glow!). I have a cold cathode tube power supply. Could I use that? DO I need to add a resistor to the anode? Should I get me a power supply of some sort instead? If so what? Very naive

[neonixie-l] Wifi adapter for NCS314

BTW, code for everything is on github: https://github.com/judge2005 -- 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

Re: [neonixie-l] NL 7094

I like to have them in clocks, but I like to have a few backups lying around too, for when they start to fail. Which reminds me, I need to buy some backups! I don't want to give the wrong impression though. It is early days so I only have IN14, IN8-2 and Z5900M. -- You received this message

Re: [neonixie-l] Re: Wifi adapter for NCS314

gt; have to remove it to program. The next version will add one. > > >> On Monday, January 23, 2017 at 7:57:38 PM UTC-5, Paul Andrews wrote: >> Hand drawn. Hopefully you can read it. It is pretty straight forward: >> >> >> >> The rectangl

[neonixie-l] Re: Tube testing?

Hi Phil, Is your tester anything like this one <http://www.decadecounter.com/vta/articleview.php?item=109>? I would love to make one, though that isn't what I was asking about! - Paul On Saturday, January 21, 2017 at 10:12:25 AM UTC-5, Paul Andrews wrote: > > Hi, > > I r

[neonixie-l] Re: Wifi adapter for NCS314

trksid=p2057872.m2749.l2649=STRK%3AMEBIDX%3AIT> . On Saturday, January 21, 2017 at 6:32:39 AM UTC-5, Paul Andrews wrote: > > Hi > > I've been working on a project to add a wifi interface to my NCS314 clock. > This clock is an Arduino shield, so it shouldn't be hard to a

Re: [neonixie-l] my version of nixie tube testing device...

t's a single use disposable camera with neon charge indicator !) Phil -- Original Message -- From: Paul Andrews <judge2...@gmail.com> Date: January 23, 2017 at 2:47 PM Hi Phil, Is your tester anything like this one <http://www.decadecounter.com/vta/articleview.php?item=109&g

[neonixie-l] HV control chips

Hi, I was following up on a discussion elsewhere which mention the HV5530 as a control chip for Nixie tubes. This has 32 outputs and 12V digital control, so it has some drawbacks. There are many other similar chips, in particular the HV3418, which has 64 outputs at 180V and 5mA, with 5V

[neonixie-l] Re: Some guy offering Rodan CD47 tubes

Whoever buys these, I need to see that clock! On Wednesday, February 22, 2017 at 7:42:02 AM UTC-5, Ian Sparkes wrote: > > There's some guy called Andre offering a number of CD47 tubes here: > > > https://www.tubeclockdb.com/component/kunena/7-buy-sell-trade/7336-rodan-cd47-gr-414-nixie.html > >

[neonixie-l] Re: In18 displaying cathode poisoning after 1000hrs or less.

I would expect that a leaky tube would be suffering from contamination. This wiki article is a good description of how these tubes work: https://en.wikipedia.org/wiki/Gas-filled_tube#Gas_purity On Saturday, February 18, 2017 at 10:11:43 PM UTC-5, Trumpeter wrote: > > Hello all, > > I have what

[neonixie-l] Completed clock...

Hi, Finally finished messing with my GRA arduino shield clock. The shield is completely pre-assembled. However I re-wrote the software, added a WiFi interface (to set the time and control the clock) and built the case (I used pololu.com to get the acrylic cut). This was all new to me, so it

Re: [neonixie-l] Re: Some guy offering Rodan CD47 tubes

http://www.thingiverse.com/thing:880429 On Thursday, February 23, 2017 at 7:25:10 PM UTC-5, I wrote: > > That sounds really very cool. Any size, within reason that anyone would > want, and much less expensive than Rodan CD47's. Engrave your own, if > you're good at that sort of thing, or have

[neonixie-l] Re: HV control chips

Well there's a lot to think about there. I'm looking to build an IN-18 clock and a battery powered Z5900 6 tube clock, and I have some IN-8-2s I just want to mess around with, and I want to light up the decimal points too. Obviously they all have different needs - especially the Z5900 and IN-18

[neonixie-l] Re: HV control chips

Wow! Too much choice! I have bought one (and an extraction tool). Just need to buy the chips and level converter now! On Friday, February 24, 2017 at 10:51:17 AM UTC-5, SWISSNIXIE - Jonathan F. wrote: > > No need to build an breadboard adapter - just look up on ebay for " plcc44 > adapter" or

[neonixie-l] Re: Some guy offering Rodan CD47 tubes

I am curious where he got them and how much he paid. I'm not suggesting that anyone could do an end-run around him, it would just be interesting to know. On Wednesday, February 22, 2017 at 7:42:02 AM UTC-5, Ian Sparkes wrote: > > There's some guy called Andre offering a number of CD47 tubes

[neonixie-l] A tube for less than $5

In 1966. In quantities of 1,000 or more. That is $37 in today's money. In case you get too concerned about the price of nixie's on ebay! -- You received this

[neonixie-l] Re: HV control chips

I am looking to drive regular Nixies. I am trying to figure out how to read those datasheets! There are a lot of variations on a theme with this family of chips. I had to think for a bit, but I get what you are saying re. low voltage - I have to keep reminding myself that low voltage == ON

[neonixie-l] Re: HV control chips

I'm slowly beginning to understand more, but on reflection I am clearly not understanding something. The HV5530 specs say output voltage is 0 - 300V. What sets that voltage? That might also be the wrong question, I am in the dark about how tying these 'outputs' to the cathodes actually works.

[neonixie-l] Pulse current and the Taylor HVPS

Hi, I'm just doing some planning for a small battery powered clock using ZM5900 tubes. I want to drive 6 of them and was looking at the Taylor 1363/1364 HVPS units. The datasheet

[neonixie-l] IN18 acrylic socket

I'm a big acrylic fan. The finished clock looks nice too. -- 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

[neonixie-l] Burroughs 4021L in a Lucite block.

Have you guys seen this ? I would like a clock just made out of 6 tubes mounted like this! -- You received this message because you are subscribed to the Google Groups

[neonixie-l] Wifi adapter for NCS314

Hi I've been working on a project to add a wifi interface to my NCS314 clock. This clock is an Arduino shield, so it shouldn't be hard to add that to the arduino right? I used an Arduino that had rows of holes next to the pins and also had specific connector patches for interface pins, so it

[neonixie-l] Re: Nixie-style EL display

Looks great! On Wednesday, March 1, 2017 at 1:18:08 PM UTC-5, jrehwin wrote: > > This is kind of cool, someone has bent EL wire into numerals to yield a > nixie-ish display. > > https://theledroom.wordpress.com/2017/02/11/el_nixie-tube/ > > - John > > -- You received this message because you

[neonixie-l] Small run fabrication

Hi, I'm trying to make a case for one of my clocks and started looking at online fabrication services such as big blue saw. I am basically looking at designing and fabricating one-offs of some simple acrylic pieces (with cut outs/holes etc.). I was wondering if anyone can recommend a service

Re: [neonixie-l] Small run fabrication

Thanks everyone. I am also considering just buying some simple pre-cut blanks from eBay and then drilling holes etc. with a bench drill. I will let you know what happens. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this

[neonixie-l] Re: Small run fabrication

ideas for how to do it, just need to figure out how to do the fabrication :-) On Wednesday, January 11, 2017 at 1:33:10 PM UTC-5, Paul Andrews wrote: > > Hi, > > I'm trying to make a case for one of my clocks and started looking at > online fabrication services such as big blu

[neonixie-l] Re: IN-13 Burn-in

There is an article about IN-13 tubes here: https://www.saltechips.com/lab/the-parasitic-current-leakage-mechanism-of-the-in-13-tube/. The whole site is dedicated to those tubes. It is very interesting reading for anyone interested in how Nixie tubes work. On Thursday, March 16, 2017 at

[neonixie-l] Re: 6844A saga

Running them at a high currenr for a while has workee, except for one holdout. This digit will light at about 4mA, which is the maximum recommended. Occasionally it will light at 2mA. When it lights it pulls the same current as all the other digits, otherwise it draws less. So I am wondering

[neonixie-l] Re: 6844A saga

Well this is fun! I upped the current signifcantly (6.9mA - just over 2x recommended max), which caused some internal arcing briefly! Blew a resistor (I guess it was a 1/4 W. Interestingly it went from being a 5.1K to being a 27K resistor). Bottom line is it kinda sorta works. But the results

Re: [neonixie-l] Lighting up an IV-15

Here's a picture > On Mar 27, 2017, at 3:47 PM, Paul Andrews <p...@nixies.us> wrote: > > Hi, > > As bought some DM160 and IV-15 tubes a while back. It was difficult to find > much information on either, but especially the IV-15 tubes. There is a > partial tran

[neonixie-l] Lighting up an IV-15

Hi, As bought some DM160 and IV-15 tubes a while back. It was difficult to find much information on either, but especially the IV-15 tubes. There is a partial translation of the Russian data sheet here on this group and I managed to find some more information at

[neonixie-l] Re: Yahoo! group files section...

Works for me. Thanks for putting this up! -- 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

[neonixie-l] Constant current source design

I wanted to start a discussion about constant current sources (as opposed to sinks, because I want to provide a constant current to the anode regardless of which cathode is pulled to ground). I've found many articles on the web. Some for Nixie constant current sinks, some for LED constant

Re: [neonixie-l] Lixies/Tixie Clock

What files/photos section? i.e. How do we access that? On Friday, March 24, 2017 at 5:07:36 AM UTC-4, johnk wrote: > > Some of you might like what you see in the files/photos section of this > Google Group or the old Yahoo Group - pics of non-nixie displays and lots > of interesting stuff. >

[neonixie-l] 6844A saga

Hi all, I recently bought some 6844A tubes of ebay - I fancied making a four tube clock with round top-view tubes. In my head I had assumed that these would be doped with mercury, but they aren't. However, before I found that out I bought four Raytheon JAN 6844A tubes and 2 Burroughs 6844A

Re: [neonixie-l] Re: My favorite Nixie tube

It's a Mullard ZM1177 > On Mar 29, 2017, at 8:21 AM, 'Terry S' via neonixie-l > <neonixie-l@googlegroups.com> wrote: > > I like the horizontal wire grid as well, what is the tube? > Terry > >> On Monday, March 27, 2017 at 10:56:56 PM UTC-5, Paul Andrews wrote

[neonixie-l] My favorite Nixie tube

at least for now! Just de-soldered a bunch of these from an old counter (and some 7441A chips). They were very grimy, but cleaned up nicely and they all work well. Cathodes are shiny and there is no darkening on the glass:

[neonixie-l] Re: brightest nixie tube clock already assembled

I like the clocks from these guys: http://www.ebay.com/usr/gra_and_afch_2?_trksid=p2053788.m1543.l2754 They are direct drive so as bright as they can be. They come in various forms, so you would probably want to make sure you at least bought one with the arduino included. They have one with a

[neonixie-l] Re: brightest nixie tube clock already assembled

l > and cheap tubes (here in Poland about 2,5$ for used tube) > > > W dniu czwartek, 16 marca 2017 15:34:05 UTC+1 użytkownik Paul Andrews > napisał: >> >> I like the clocks from these guys: >> http://www.ebay.com/usr/gra_and_afch_2?_trksid=p2053788.m1543.l2754 T

[neonixie-l] Re: Mounting IN-18 tubes

t how best to get them from the Eagle files! On Monday, February 6, 2017 at 10:48:04 PM UTC-5, Paul Andrews wrote: > > Hi, > > Does anyone have any suggestions about how to mount IN-18 tubes? It looks > like they are intended to be socketed and I see some sockets/pins on

Re: [neonixie-l] Radioactive Nixies - Study

My wife sends us this link: http://thedollop.net/wp/episode-20-dollop/ about David Hahn. I think she means it as a cautionary tale! > On Mar 14, 2017, at 2:01 PM, gregebert wrote: > > Anyone know how the radiation "hazard" of nixies compares to Xrays produced > by color

Re: [neonixie-l] Mounting IN-18 tubes

gt; See diagram attached: > > > John S > > > On 7 Feb 2017, at 03:48, Paul Andrews wrote: > > Does anyone have any suggestions about how to mount IN-18 tubes? It looks > like they are intended to be socketed and I see some sockets/pins on ebay. > I would like to underligh

Re: [neonixie-l] Re: Mounting IN-18 tubes

Current measured at 6mA. > On Mar 16, 2017, at 9:40 PM, Gene Segal <wavefr...@earthlink.net> wrote: > > Looks WAY overdriven!!! Don't expect it to last too long at that current... > >> Paul Andrews March 16, 2017 at 6:28 PM >> >> A picture of one of my IN-1

[neonixie-l] Re: Mounting IN-18 tubes

A picture of one of my IN-18s plugged into the first PCB I have ever designed and had made (KiCAD and OSH park). It is a breadboard adaptor! It is being driven from an arduino using a K155ID1. Someone (I don't remember who) pointed out that you can use a K155ID1 to drive LEDs as a good way to

[neonixie-l] Lixies/Tixie Clock

Just came across this on Tindie: > > Here's a link to a cool Youtube video: https://www.youtube.com/watch?v=FwXqQos0ZFk I have to say. I really like this. -- You

Re: [neonixie-l] Lixies/Tixie Clock

ng the backer's funds to pay for car > repairs, and nothing was ever delivered, nor was there any attempt at making > it right with backers. > >> On Tue, Mar 21, 2017 at 5:37 PM, Paul Andrews <p...@nixies.us> wrote: >> Just came across this on Tindie: >> >&

Re: [neonixie-l] Radioactive Nixies - Study

containing nuclear war heads would set them off... > On Mar 15, 2017, at 10:36 AM, NeonJohn <j...@neon-john.com> wrote: > > > >> On 03/15/2017 09:42 AM, Mark Moulding wrote: >> >>> On Tuesday, March 14, 2017 at 10:02:40 AM UTC-7, Paul Andrews wrote: &g

Re: [neonixie-l] Re: brightest nixie tube clock already assembled

Interesting. I played around with adding Alexa support to one of my clocks. Nothing fancy, just being able to turn the alarm on and off, the backlights on and off etc. Basically it made it look like multiple wemo devices so all the commands were things like 'Alexa turn backlight off' The alarm

[neonixie-l] IN-18 ON EBAY?

Bought some NOS from Ukrainian_gifts. Haven't done much with them since other than fire one up just for the kicks. Worked fine. -- 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,

[neonixie-l] Re: My favorite Nixie tube

There's some interesting tubes for sale on ebay atm. DR-2010 (made in Brasil?), and in light of Tomasz post, some ZM1080

[neonixie-l] Re: Constant current source design

My parts arrived, so I finally got to try it. It actually works! Now on to trying variations - I plan to follow the course here <https://www.allaboutcircuits.com/textbook/experiments/chpt-5/current-mirror/> . On Friday, March 24, 2017 at 11:26:32 PM UTC-4, Paul Andrews wrote: > &

[neonixie-l] Re: Constant current source design

Next installment. First I tried the current mirror with 2K resistors between +300V and the emitters. This works fine, but is also no more stable than the first solution. It presumably also wastes more power as R2 has to be higher - it is setting the current, so I chose 100K here to get 2mA:

[neonixie-l] Re: Constant current source design

If I just look at all of the circuit diagrams for various current limiters, it begins to seem like any combination of a couple of transistors and a bunch of resistors works! Hence my need to do some 'practicals', it makes me go in to it all in enough depth to actually begin to understand. BTW,

Re: [neonixie-l] Constant current source design

You need a few ions around in the Neon for the cascade to start. This can happen for a variety of reasons including cosmic rays, background radiation or doping of the gas mixture with something radioactive. There is at least one thread on here about radioactive nixies (which sent me off on a

[neonixie-l] Video with nixies display in old secret place

I was staying in Portmeirion a while back, they have have a 24 hour prisoner channel on the TV in the rooms. I was watching the finale and was thinking that this is the era of the Nixie tube (1967), and what do you know? In the final minutes in the village there is a countdown sequence that

Re: [neonixie-l] Re: Manufacturing affordable large, new nixie tubes

Quite. Thankyou for saying this. Life is full of people saying why you can't do something. Achievements happen despite that and not because of it. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving

Re: [neonixie-l] Re: Manufacturing affordable large, new nixie tubes

I would buy that! On Friday, April 21, 2017 at 11:39:29 PM UTC-4, Jens Boos wrote: > > Wow, now we did it. Is that really the message we want to send to a person > who is looking into making Nixie tubes? > > I admire Dalibor for what he has achieved. Perhaps some of you remember > that I tried

[neonixie-l] What is this 6209 G from sharp calculator?

Hi, I'm salvaging some tubes from an old (broken) Sharp calculator and there is this on the display board (unfortunately I couldn't de-solder it so it is a little beat up, though probably salvageable). I can't find out what it is, does anyone know?

[neonixie-l] Love for small tubes

This is a little video of a CD80-P cycling through all its digits (plus the decimal point is lit up). I know that most people are obsessed with the larger tubes, but I love the small tubes. The digits on this are particularly sharp (no pun intended - it was

Re: [neonixie-l] Re: What is this 6209 G from sharp calculator?

It has connections to each of the cathodes. There are twelve cathodes for these tubes (CD80-P), so twelve pins are connected each to a different cathode (that might be 11. There is one trace that is difficult to follow). That leaves 8 pins on the device itself. Each cathode on a tube is

[neonixie-l] Re: What is this 6209 G from sharp calculator?

, 2017 at 11:15:29 AM UTC-4, Paul Andrews wrote: > > Hi, > > I'm salvaging some tubes from an old (broken) Sharp calculator and there > is this on the display board (unfortunately I couldn't de-solder it so it > is a little beat up, though probably salvageable). I can't find

[neonixie-l] Lighting up a DM160

I just impulsively bought some DM160 VFD indicators and now I am at a loss as to how to power them! Can anyone help? -- 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

[neonixie-l] Re: Lighting up a DM160

Boy did I buy myself into a hole with this one! I had just about got to grips with Nixie tubes, now I have a whole new technology to learn; I'm sure a lot of the folks on this list know the ins and outs of triodes - I'm not one of them! I will get there eventually though. Apologies if what

[neonixie-l] Re: Lighting up a DM160

, Paul Andrews wrote: > > I just impulsively bought some DM160 VFD indicators and now I am at a loss > as to how to power them! Can anyone help? > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and

[neonixie-l] Re: Radioactive Nixies - Study

Which is where my thoughts about the provenance of tubes from the Ukraine arises. Where are these warehouses that for some reason still have large quantities of Nixie tubes in them? This doesn't keep me up at night, but I would like to know. Perhaps someone could make a documentary about the

[neonixie-l] A new old NixiSat about to be built!

Does this help (not sure it is the same thing, but it might help you get in touch with the right people): http://www.azevedo-devices.com/blog/nwts-syncing-a-jeff-thomas-gpsii-clock -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe

[neonixie-l] Any good (simple) guides to building puck converters?

I've come to the conclusion that I need to be able to build my own puck converters, at least so I can understand what I am looking at when I look at schematics for other people's converters! I could do with something that takes me from a simple example up to more complex examples that fix

[neonixie-l] Re: Any good (simple) guides to building puck converters?

I need to wait until the coffee takes effect. I mean boost converters! Can I change the title? On Tuesday, March 14, 2017 at 8:35:02 AM UTC-4, Paul Andrews wrote: > > I've come to the conclusion that I need to be able to build my own puck > converters, at least so I can understand

[neonixie-l] Any good guides to building boost converters?

Hi, I have decided that I need to actually understand the details of boost converter design, rather than just the principles (you know, back-emf and all that). It would be helpful to have a course that takes me through a basic implementation and then addresses issues such as efficiency, input

[neonixie-l] Re: Lighting up a DM160

Here is a schematic. Some notes about it: The filament (aka the cathode) should always have 1V across it. It has to be warm. When it is warm it has a resistance of about 30R. So the purpose of the resistor network there is that it cuts the 12V up into 3V, 1V and 8V (approximately). The filament

[neonixie-l] Re: Radioactive Nixies - Study

I have often wondered about taking a geiger counter to my tubes. Call me paranoid, but I wonder where some of the NOS tubes come from precisely. On Sunday, March 12, 2017 at 3:41:11 PM UTC-4, SWISSNIXIE - Jonathan F. wrote: > > Hi > > This might be a little off topic or irrelevant, but maybe

[neonixie-l] Re: IN-14 and Mystery Tube?

Tell me about it :-/ I had smoke coming out of something the other day. Amazingly nothing was damaged. Live and learn! On Sunday, March 12, 2017 at 10:17:17 PM UTC-4, gregebert wrote: > > *If everything is properly connected*, even an internal short in the > 74141 that leaked high-voltage back

Re: [neonixie-l] Re: Why Mercury?

OK, but how does it reduce sputtering? > On Mar 8, 2017, at 8:08 AM, Dekatron42 wrote: > > Here's one patent: http://google.ch/patents/US3944869 that says: > > "For many years, display devices such as NIXIE tubes have used mercury vapor > along with the normal inert

[neonixie-l] Why Mercury?

Hi, I've been trying to find information on what the mechanism is that allows Mercury to extend the lifespan of Nixie tubes. I haven't been able to find anything, only assertions that 'Mercury is added to extend the lifespan of the tubes'. I found a link about the halogen cycle on this group.

Re: [neonixie-l] Re: IN-14 and Mystery Tube?

The only components in there were resistors and the breadboard itself. Voltages were nixie level. I would say it was either a resistor or the breadboard itself. I am pretty religious about measuring stuff before I turn the power on (and after), and if there had been anything more complicated in

Re: [neonixie-l] Re: Constant current source design

Totally agree. This is one reason I like to actually try these things out. > On Apr 7, 2017, at 11:02 PM, gregebert wrote: > > My concern with current limiters that rely heavily upon the datasheet specs > (Vgs for Depletion-mode regulator; Vbe for current-mirror) is

[neonixie-l] Re: Constant current source design

Here is a link to a paper about using a depletion mode MOSFET for the same purpose. It gives this equation for calculating the resistor value,

[neonixie-l] Re: Constant current source design

Although a mosfet current mirror would use fewer components as you only need one Rset (section three of this <http://web.mit.edu/6.012/www/SP07-L25.pdf>paper). I guess I need to place yet another order with digikey to try some of these out. On Friday, April 7, 2017 at 5:34:49 PM UTC-4

[neonixie-l] Question about QS30-1

Hi What is the difference between the QS30-1 SZ3 and SZ8? -- 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

[neonixie-l] Re: Loop compensation and Bode plots?

BTW the zipped model works fne. On Sunday, August 13, 2017 at 10:29:17 AM UTC-4, Paul Andrews wrote: > > The flex model is at > http://katalog.we-online.com/pbs/download/Download%20%20WE_FLEX%20LTspice%20(rev1).zip > > > On Saturday, August 12, 2017 at 11:15:20 PM

Re: [neonixie-l] Re: Loop compensation and Bode plots?

No I hadn't seen that. It looks very useful. Thanks. > On Aug 16, 2017, at 11:24 AM, Nick <n...@desmith.net> wrote: > >> On Wednesday, 16 August 2017 01:48:18 UTC+4, Paul Andrews wrote: >> BTW the zipped model works fne. > > That's good - have you seen this art

[neonixie-l] Re: Loop compensation and Bode plots?

s I could > find are from http://katalog.we-online.de/de/pbs/WE-FLEX#vs_ct:1 and > don't include the model you are using - which specific transformer is this? > > Nick > > On Saturday, 12 August 2017 20:16:53 UTC+4, Paul Andrews wrote: >> >> I tried running this ve

[neonixie-l] Re: OT: Lateral thinking: Cheap SMT reflow oven...

I've done some hot plate reflow. Discrete components down to 0603 are straightfoward and easy to touch up with a soldering iron. Chips, on the other hand... I recently burned through three boards with a ESP8285 and a CP2102N on it. Never did get them to work.The main problem is not being able

[neonixie-l] Re: PV Electronics R568 Clock Project With Black R|Z568M Nixie Tubes

I always enjoy reading detailed descriptions of the process of making something. It is not something I have any real experience with, so it helps me start to understand the process and the options for when I finally get around to this. -- You received this message because you are subscribed

[neonixie-l] Loop compensation and Bode plots?

Hi, I decided to try to make my own boost converter. You know. How hard can it be? Anyway I have gone down a rat hole with trying to understand how to calculate R/C values for loop compensation (in the following, bear in mind that I am not an electrical engineer). One chip I am looking at is

Re: [neonixie-l] Re: Loop compensation and Bode plots?

Yes. I've got 3 different linear tech devices on my list. The LM3478 actually has an LTSpice model and the Wurth flex transformer I'm using does too (from TI and Wurth respectively). The circuit I put together simulates just fine, so I'm just trying to increase my level of confidence in it at

Re: [neonixie-l] Re: Loop compensation and Bode plots?

Thanks. I will check. I wish I had a faster computer. It is taking about 15 mins to do a 8ms simulation ATM. I wonder if there are any online versions? Hmm. I wonder if I could use my own online servers or Amazon cloud? I've never used my own servers for anything other web hosting/svn etc.

[neonixie-l] Re: Loop compensation and Bode plots?

I am using an LM3478 library and a Wurth flex transformer library. I suspect that is where the time is going. I have zipped up the .asc file and the aformentioned libraries (though the Wurth ones were pulled out of the LTSpice library folder, so they are in the wrong place!). Hmm, I guess I

[neonixie-l] Re: Loop compensation and Bode plots?

I put a file (MyHVPS.zip in the temp folder of our google drive). On Saturday, August 12, 2017 at 9:32:18 AM UTC-4, Paul Andrews wrote: > > I am using an LM3478 library and a Wurth flex transformer library. I > suspect that is where the time is going. I have zipped up the

[neonixie-l] Re: Loop compensation and Bode plots?

I tried running this version, but the simulation window doesn't open and I can't place probes on the circuit. I looked in the .asc file and fixed up the path to the wurth model, but it made no difference. I have no idea how to get that window back. Also, the values of caps that were uF became

Re: [neonixie-l] Re: Loop compensation and Bode plots?

og.we-online.de/de/pbs/WE-FLEX#vs_ct:1 and don't include > the model you are using - which specific transformer is this? > > Nick > >> On Saturday, 12 August 2017 20:16:53 UTC+4, Paul Andrews wrote: >> I tried running this version, but the simulation window doesn't open and

Re: [neonixie-l] Adjusting this schematic for a 300V output

This page has good layout guidelines. it includes the reasons, so you can figure out what applies to other designs: http://desmith.net/NMdS/Electronics/NixiePSU.html. The data sheets for some of the converter chips are also good sources of layout design. I'm at the point in my own learning

[neonixie-l] Re: Some videos of a National Union Inditron GI-10

I was wondering if I could use the same circuit to drive any Nixies tube. It seemed a reasonable assumption, but I didn't want to mess up any of my other tubes. Then I remembered that I had an IN-16 that was missing its anode wire (it is also missing the wire for the digit 4 as you will see).

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