Are you driving the HV5530's with the correct signal levels ? Per the datasheet, they should be 0 or +12V, but many have been able to run them at TTL-levels and that can lead to intermittent problems.
Secondly, are you giving enough dead-time before-and-after wiggling the clock signal ? If not, there could be a race condition, which can get worsened if not running at 12V logic levels. On Tuesday, March 25, 2025 at 4:52:13 AM UTC+7 JBro63 wrote: > Hi all. > > Ok so some progress. First PCBs have arrived and the K155ID1 IN12 based > clock is almost complete. I also knocked up a very basic breakout board for > a PLCC 44 pin socket to allow me to start testing with the HV5530 with a > breadboard and am having mixed results. > > To learn how to use the HV5530 I'm using LEDs connected to the outputs, > each with a 220 ohm resistor in series in place of the nixie tubes and the > connections from an ESP32 go through a CD4504BE with VDD at 12v. The LEDs > have a common +5V and the POL pin on the HV5530 is tied to +12v > > https://reboots.g-cipher.net/time/ disusses how to write data to the > driver. > > With only a single HV5530 connected and using digitalWrite() I'm able to > blank / light all outputs reliably or target a single output. There is some > flicker if I 'disturb' the wires on the breadboard but otherwise seems > good. Adding a second driver (shared clock & latch pin, DO on driver one > connected to DIN on driver two) causes all LEDs to flicker randomly and > those on the second driver are not in the correct sequence. > > Using a separate set of pins for each driver improves things - the LEDs on > driver two light as programmed - but there is still some flickering evident > on all LEDs. > > Is there anything obvious I can change in the above to improve matters? > I've seen several references to SPI but am 1) unsure why one would choose > SPI over digitalWrite() and 2) it seems more difficult to implement. If > anyone has a very simple example how to use SPI with the HV5530 and ESP32 I > would be grateful. > > Thanks > On Monday, 10 March 2025 at 11:49:58 UTC JBro63 wrote: > >> Thanks Ian, that's really helpful. >> >> On Saturday, 8 March 2025 at 08:33:06 UTC Ian Sparkes wrote: >> >>> They work fine at 5V. Never had a problem with one at 5V. >>> >>> But attention: ESP uses 3V3 and you might need to use a lever shifter >>> (e.g. CD40109) to make it work. >>> >>> On Monday, 3 March 2025 at 20:39:00 UTC+1 newxito wrote: >>> >>>> I use the HV5622, which goes up to 220 V, I think there is also a PLCC >>>> version. The disadvantages are the price and that it should be operated >>>> with 12V according to spec. However, I never had any problems using the >>>> chip with 5V. >>>> JBro63 schrieb am Montag, 3. März 2025 um 19:02:56 UTC+1: >>>> >>>>> Hi all, >>>>> >>>>> Group noob here, about to start build on a few different types of >>>>> display using Nixie tubes and ESP32. >>>>> >>>>> Planning to use K155ID1 initially (as I have a bunch) with some IN-12 >>>>> and IN14 tubes but want to also try HV driver such as the 5812 or 5530 so >>>>> would welcome any comment on which is the best one to go for or an >>>>> alternative. I don't intend to multiplex. Any driver would need to be DIP >>>>> or PLCC. >>>>> >>>>> Have spent many hours looking at the schematics and designs of others, >>>>> I'm grasping the basics but one frustration and evident gap in my >>>>> knowledge >>>>> is how to pick / calculate the correct component and its size or rating >>>>> for >>>>> anything other than the most basic circuit. >>>>> >>>>> For example, with a 180v supply, calculating the anode resistor for a >>>>> tube based on the datasheet is straight forward enough as the maintaining >>>>> voltage and current are known. >>>>> >>>>> When looking at something like the HV5812, many seem to use a 60 or >>>>> 70V zener diode with a resistor to keep below the max for the chip but >>>>> how >>>>> do you determine the current needed for the driver, diode and load to be >>>>> able to calculate the current limiting resistor? The diode datasheet is >>>>> simple enough but I'm lost with the sheet for the HV5812. >>>>> >>>>> Thanks. >>>>> >>>>> -- 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 [email protected]. To view this discussion, visit https://groups.google.com/d/msgid/neonixie-l/c4031515-d58d-44b0-a9d7-58ac09d783edn%40googlegroups.com.
