Re: [neonixie-l] Soviet DMM Front Panel Labelling

Yeah, shipping is worse than ever. On Sat, Aug 13, 2022, 2:34 PM Mac Doktor wrote: > Another ex-Soviet Nixie DMM: > > https://www.ebay.com/itm/125460995198 > > > Take a look at the last picture. The prefix is a capitol letter pi ("П") > and the rotary switch is set to "R" (Roman alphabet) with a

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

I've used HV5522 and HV5622 a lot without any issue - I always use a CD40109B level shifter to convert from 3v3V or 5V to 12V (I know many do not). In Arduino Land there is a function called ShiftOut which does all the required clocking - it's for 8 bits as standard but can easily be re-worked

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

You are a legend! I've looked at the schematics, very neat.I'm traveling on business tonight, back next weekend. Then I'll design my own board for 4 beautiful Rz568m (present for my parents on Christmas). Glad I now understand how the HV5530 etc work. Looking forward to playing around with the c

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

Yes, the code is open source :) You can download it at the bottom of the page https://www.swissnixie.com/sunixs/ I programmed it in Arduino with the atmeag328, but it should be a good start to look at the function "setOutputs" in the code, it contains the actual shifting process. Also it's eas

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

Jonathan,I just found this, it's excellent.  http://swissnixie.com/projects/SUNIX-S/SN_SUNIX_S_R1.2_WTB_SCHEMATIC.pngFrom this post:https://groups.google.com/g/neonixie-l/c/S1oX30hLrmwIf the code is open source, I'll just use that otherwise I'll adapt mine to use hv5530 and hef4104. Awesome!  --

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

Thanks. So, that confirms that multiplexing reduces brightness. Which makes sense now that I start to understand how the HV5530 works. Original message From: Bill Stanley Date: 13/08/2022 21:00 (GMT+00:00) To: neonixie-l Subject: Re: [neonixie-l] Re: Nixie Clock - Direct Dr

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

Great. I found a nice page that confirms the sequence of CLK/Data, I think it's in line with my understanding of your suggestions.  http://reboots.g-cipher.net/time/So, the code for a serial to parallel convertershould be easy to implement.Yes, I'm aware that some people use the hv5530 at 5V but

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

I believe the shift register speed is rated to 8mhz in these series of HV shift registers. But its not usually a problem since most people will probably not drive them that fast. I did run a similar chip,the HV5122 at 5v with a 3.3v logic input (!) on a prototype of my last clock. It worked OK

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

Using the high voltage serial to parallel part (I use the HV5812PJ-G ) is direct drive in that the NIXIE digits are driven with a stable readout until the digit(s) change to update the time. The multiplexed drive uses (typically) open collector NPN transistors connected to the 10 cathodes tied t

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

The time to shift out the bits is not critical, the clock rate is as fast as you implement it, there is only a minimum clock time, but no maximum one. Brightness should be the same as putting the tube pin directly to ground, the internal resistance of the mosfet in the HV5530 is in the Ohms range

[neonixie-l] Soviet DMM Front Panel Labelling

Another ex-Soviet Nixie DMM: https://www.ebay.com/itm/125460995198 Take a look at the last picture. The prefix is a capitol letter pi ("П") and the rotary switch is set to "R" (Roman alphabet) with a downward pointing arrow next to. What do these things

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

Thanks.In terms of nixie brightness, is there any advantage in using serial to parallel converter+shift register vs multiplexing using high voltage transistors on anodes and cathodes of the nixies? Other than saving component and uC pins, of course.  Original message From: Bill

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

I use that part for my NIXIE, Panaplex and LED displays and I also write in assembly (8051, not PIC) For my code, I send the serial data for NEXT time to display in the time after a 1 second update. On the 1 second "hack" I update the display by doing the serial to parallel pulse. Here is the co

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

Thank you both. Say that I want to drive high HVOUT12 on pin2 (that is binary b'0010') of the HV5530... and reading your previous messages, do I simply...: drive pin28 (CLOCK) low drive pin31 (LE) low drive pin28 (CLOCK) high drive pin32 (DATA Input) low ; send 0 for bit 0 of b'0010' dr

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

Be sure to use a level translator to drive the 5530-type devices at the proper signal voltages (12 VDC). Some people have driven them at 5V, which is out-of-spec and not guaranteed to work. I use these drivers in some of my clocks and they work very well. Pardon my rant below, but I've been d

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

Hi Max, The HV5530 and other HV-Series IC's are "Serial to Paralell" converters which allow to be control 32-pins (or even more with multiple ic's) from single clock and data lines. They are basically normal serial to parallel converters with high voltage transistors attached. To operate these

[neonixie-l] Nixie Clock - Direct Drive HV5530

Hello, I'm starting to design my first 6 digit nixie clock and I'd like to use direct drive of the tubes (my power supply can take 6 nixies without multiplexing). So far I have built my Nixie watch, coding in ASM, worked on extreme power saving etc. I could multiplex the nixies as I did in th

[neonixie-l] Nixie Clock - Direct Drive HV5530

Hello, I'm starting to design my first 6 digit nixie clock and I'd like to use direct drive of the tunes (my power supply can take 6 nixies without multiplexing). So far I have built my Nixie watch, coding in ASM, worked on extreme power saving etc. I could multiplex the nixies as I did in th