Re: [neonixie-l] Scope clock STM32

Amazing work! I've been working on porting a fork of David Forbes' code to an STM32G474. Got a starfield and 3D cube showing, but got somewhat stuck. Now looking at designing a power supply. Are you planning on sharing the software? tirsdag den 27. februar 2024 kl. 22.13.25 UTC+1 skrev paulvr:

Re: [neonixie-l] Re: Helping Nixie Tubes Fire in a Darkened Room

You won't generate ozone with 365nm. You'd need shorter wavelength UVC for that. søndag den 3. december 2023 kl. 09.25.35 UTC+1 skrev Tidak Ada: > Hi Jeff, good to hear you are content with my suggestion. > > Two remarks: I bought at a time small 365nm transmission filter from a > seller at

Re: [neonixie-l] SP-252 Seeking drawings

Can't help you with better drawings, but I can recommend 3D-printing a small piece with the holes at the planned locations to verify the fit before sending off the board for production. I've used this technique myself a couple of times. søndag den 5. november 2023 kl. 16.12.59 UTC+1 skrev

[neonixie-l] Re: Diving VFD such as IV-22 etc DC Vs AC Filament drive

The IV-22 has very low filament voltage. Something like 1.2V IIRC. That makes the voltage gradient across the display face low and I didn't notice a brightness gradient while running one with DC. Used a simple buck converter for the filament and a boost converter for the anodes and grid. fredag

Re: [neonixie-l] Is there a cheaper alternative to the IN-18 at that size?

I agree with Terry. Leave the coating on, unless it's damaged! fredag den 31. marts 2023 kl. 18.09.14 UTC+2 skrev Mac Doktor: > > On Mar 28, 2023, at 9:07 AM, Zachary Laurin wrote: > > Do you know if it's possible to remove the red coating from the Z566? > > > Oh, the humanity. They're so

Re: [neonixie-l] Re: IV-9 numitron lifespan

gregebert, I'm pretty sure it has nothing to do with inductance, as that would have the opposite effect, as current lags voltage in an inductor. As shown in the formula you posted, the voltage across the inductor, the voltage across the inductor is proportional to the rate of change in current

Re: [neonixie-l] Re: IN-8-2 Anode wire broken

Instead of using just one cathode as anode, if you're using it for the 10s of hours, you can hook up all the remaining 7 cathodes to be anodes. I did this in one of my clocks. The striking voltage is still slightly higher, but it works quite well. mandag den 20. marts 2023 kl. 19.50.04 UTC+1

[neonixie-l] Re: DTF104B Group Buy

I'm down for 15 as well! tirsdag den 28. februar 2023 kl. 06.47.14 UTC+1 skrev newxito: > Hi Nick > > If you're willing to send the tubes to Switzerland, I'd take 15. Thanks. > > Cheers, Andy > > Nicholas Stock schrieb am Samstag, 25. Februar 2023 um 21:16:42 UTC+1: > >> Fellow enthusiasts. I

[neonixie-l] Re: Any factories in the world still actively mass producing nixie tubes?

>From what I've read a couple of places, it seems the last mass produced nixies were made in the early 90s in the then Soviet Union and production ceased around the dissolution of the Union. There could be some I'm not aware of, but it's not something I've heard of in the 6 years I've been

[neonixie-l] Re: What will happen if current slightly below specification in long time?

; > About these reasons. (I'm not sure if my concerns are correct.) > > Christian Riise Wagner 在 2023年1月15日 星期日凌晨12:53:18 [UTC+8] 的信中寫道： > >> Out of curiosity, why doesn't PWM sound like a good idea? There isn't >> really an alternative, other than lowering the current, which you do

[neonixie-l] Re: What will happen if current slightly below specification in long time?

Out of curiosity, why doesn't PWM sound like a good idea? There isn't really an alternative, other than lowering the current, which you don't seem too fond of either. I'd say PWM is the easier method. Just choose a sufficiently high frequency to avoid noticeable flickering. Note that the

Re: [neonixie-l] Digest for neonixie-l@googlegroups.com - 3 updates in 2 topics

If on a mobile browser, I've found that you need to check the "Show as standard website" box to have the reply buttons show up. For some reason they don't on the mobile version of the page. This is on Chrome on an Android phone. If accessing from a "normal" computer, you should have the reply

Re: [neonixie-l] Re: Nixie Clock - Direct Drive HV5530

y, August 17, 2022 at 1:29:36 PM UTC-7 LB wrote: > >> I’ve had great experience with the TPIC6B595s, I used them to drive a >> whole bunch of miniature bayonet style bulbs for a clock using IEE one >> plane readouts, no problems with them so far. Probably a little over 120 mA

Re: [neonixie-l] Re: Nixie Clock - Direct Drive HV5530

Even running more than 3 segments @20mA is actually out of spec as the maximum ground and source current for the 74HC595 is 70mA. I found that it didn't work satisfactory for an IV-19. Too high a voltage drop. Might be okay for smaller numitrons though. I've ordered some TPIC6C595 instead to

Re: [neonixie-l] nixiechron issue (was Nixiechrom woes)

If you happen to have an Arduino board laying around, you can use that as a USB-serial adapter as well. Just tie the reset pin to ground. fredag den 15. juli 2022 kl. 18.29.33 UTC+2 skrev alr...@yahoo.com: > well finding a usb-serial adapter is the easy thing, in case you find out > that the

[neonixie-l] Re: PM 2423

I have that same meter! https://freeservicemanuals.info/en/servicemanuals/viewmanual/Philips/PM2423/ mandag den 27. september 2021 kl. 02.21.15 UTC+2 skrev artgod...@googlemail.com: > Does anyone know where to find a schematic for a Philips PM2423 Nixie > digital multimeter, please ? > > --

[neonixie-l] Re: I had to have the 7777777777 tube!

So cool! Now make a video of it cycling though all the 7s. Btw, may I ask what you ended up paying? The original asking price was astronomical by my standards. lørdag den 10. juli 2021 kl. 21.46.37 UTC+2 skrev Bartek Ogryz: > I'd been watching it on eBay :) > > Does it has any printing on it?

Re: [neonixie-l] High speed mosfet for High Voltage Power Supply

high though, it will start to affect the efficiency, leading to a higher current consumption when on, due to the boost converter compensating for the voltage drop. mandag den 7. juni 2021 kl. 07.10.53 UTC+2 skrev Christian Riise Wagner: > The MMBTA42 is a bipolar transistor and not a

Re: [neonixie-l] High speed mosfet for High Voltage Power Supply

information. > > Thanks Christian. > > Il giorno domenica 6 giugno 2021 alle 21:17:00 UTC+1 Christian Riise > Wagner ha scritto: > >> I've successfully used a P-channel MOSFET as a high side load switch for >> a LM3478 based tapped inductor booster. IIRC the off

Re: [neonixie-l] High speed mosfet for High Voltage Power Supply

I've successfully used a P-channel MOSFET as a high side load switch for a LM3478 based tapped inductor booster. IIRC the off current was immeasurable, so sub 100nA. søndag den 6. juni 2021 kl. 19.33.50 UTC+2 skrev flata...@gmail.com: > Thanks David, indeed you are absolutely right. The power

Re: [neonixie-l] Nixie Pendulum

Had a plan to build a spinning nixie PoV clock as Kevin described. Even bought some parts for it, but ended up abandoning the project. It has been done before though - Twice! http://www.nixiana.com/hardware/ntpclock.shtml http://www.electronixandmore.com/projects/nixieclocks/4.html torsdag den

[neonixie-l] Re: Heathkit GC-1093...(it glows orange..)

If it's really the driver that's at fault, I'd agree with the above post of making a little replacement board with discrete transistors. They should be MPSA42 though, as MPSA92 are PNP. tirsdag den 9. februar 2021 kl. 20.12.54 UTC+1 skrev jf...@my-deja.com: > If you have enough space, here is

Re: [neonixie-l] Re: Nixie tube failure - not outgassed, but does not maintain ignition?

3vaRSbmJ3eLSjP3lwjVbtE2FTESm-/view?usp=drive_web> > > > On Thu, Nov 26, 2020 at 10:45 AM Nick Andrews wrote: > >> It would certainly be an experiment. You could slather a little high >> vacuum epoxy around the pins to help seal the metal to glass joints if tha

[neonixie-l] Re: IN-16 without Neon but with Argon

That's pretty cool that it somewhat lights up. However I think that you're mistaken in your assumption that the neon has escaped, leaving only argon in there. The gas mixture in a Nixie tube is at a very low pressure, so my guess is that atmospheric air has leaked into the tube, thus increasing

Re: [neonixie-l] New clock project with R|Z568M nixies

A quick test you can do is lowering the values of your pull-ups. You can easily use half your current values, assuming you've only placed a single one on each of the lines. Should even be able to go lower than that. A 1k resistor will result in 5mA at the 5V side, which should be manageable by

Re: [neonixie-l] New clock project with R|Z568M nixies

What value resistors are you using for the pull-ups on the I2C bus? Also, what voltage are the microcontrollers in the smart sockets run at? If they're 5V, you'll have more EMI susceptibility on the bus, as the ESP32 runs the bus at 3.3V. A level shifter close to the ESP32 should provide a

Re: [neonixie-l] Re: Nixie tube failure - not outgassed, but does not maintain ignition?

I suppose it could be regassed, though it probably wouldn't be easy as the evacuation port is typically close to the rest of the glass envelope. The problem is that if the tube is leaky, it's just a matter of time before it will fail again. onsdag den 25. november 2020 kl. 18.06.14 UTC+1 skrev

[neonixie-l] Re: FM Receiver with nixies and scope

Techmoan did a video on this a while back. tirsdag den 3. november 2020 kl. 18.48.47 UTC+1 skrev gregebert: > Anyone remember this receiver from the 1970's ? I vaguely recall seeing it > in a magazine like stereo review or popular electronics. > > > [image:

Re: [neonixie-l] Re: A huge 7 Segment display made out of 23 IN-28 tubes? Wack.

Smoothing the full wave rectified AC gets you close to √2 times the RMS AC voltage. In this case it'd be about 320 VDC. I think the point Paul was making was that you don't need to smooth the rectified AC, and instead just drive the tubes using the pulsed DC. fredag den 16. oktober 2020 kl.

[neonixie-l] Re: Digit Fading / transition effects using HV566 Blanking

Richard, I'm using the 32-bit SPI-write for my most recent ESP32 based clock. I'm saving the data for all six tubes and the colons in a single 64-bit variable (uint64_t), so sending out the data can be done with just four lines of code: digitalWrite(SS, LOW); SPI.write32(nixData);

[neonixie-l] Re: What Type of Booster DC-DC is this one?

I have to disagree with this being a flyback converter, as there is no transformer. It's simply a boost converter, albeit drawn in a quite confusing way. Although as gregebert said, it appears that the drain and source of the MOSFET (U1) have been reversed. The output including the gate drive