Basically - schematic would be useful On Friday, November 4, 2022 at 9:34:42 AM UTC-4 Paul Andrews wrote:
> You didn't say how you had the other pins connected. So: > > - VPP should be around 60V. A cathode will be off when its voltage is > pushed to VPP. > - GND, VBIAS and HVGND should all be at 0V. A cathode will be on when > its voltage is pulled to this. > - All the chips, apart from the first one, should have DOUT connected > to DIN of the next chip. > - Use the SPI library to shift data in to the chips, then pull LE low, > then push it high. > - With POL high, a 1 in the data will be a high on the corresponding > HV output, which would turn the cathode off. Reverse if POL is low. > - There are four possible combinations of the setup arguments to SPI - > they affect the relative timing and polarity of the toggles to CLK and > DIN. > You will also need to set the speed at which the data is shifted out if > memory serves me right. > > Write some code that shifts a specific pattern of data to the tubes - you > will want to only turn on one cathode on each tube, so if POL is low, you > will want to set one bit for each tube. If you don't see what you expect, > mess around with the SPI parameters, POL and the bits you set until you get > what you are expecting. > > On Thursday, November 3, 2022 at 5:45:03 PM UTC-4 [email protected] > wrote: > >> Hi, as my final Masters Degree thesis in Microelectronics I decided to >> create portable/small form-factor nixie tube clock using ZM1082T. Whole >> project is circled around modern connectivity, so I am using USB type-c for >> programing and powering plus Wi-Fi connectivity and all that. So simply >> put, I designed my own PCB, which is thing I do and it's fine, but besides >> some pinout and footprint miss-steps, everything about that is fine, all my >> features (temp, buzzer, RGB Neopixel backlight, Wi-Fi, USB-C powering and >> programing, protections, RTC) are working flawlessly. My problem is, I am >> not a programmer, and all the features mentioned above were tested using >> example libraries and that's fine for having something from which I can >> kick-off and create final whole code, but with HV528 it's different story. >> In this whole Group there is not much about using push-pull configuration >> HV chips from microchip (which, believe me, if I could, I wouldn't have >> chosen this chip, but chip shortage, availability, money, my country >> shipping, etc..... that's why and this is what I got). With poor datasheet >> details from microchip, POL and BP pins are for me quite a mystery and when >> creating schematic and PCB I left BP open and POL with LE, CLK, DIN were >> connected to ESP (on SPI pins, POL and LE to GPIO). which should be fine >> based on my reasearch, but for the love of god, I can't seem to figure out >> to test it, and control it. Only thing I could manage was that all cathodes >> were glowing :D. But basically I am too lazy and time limited to create >> some code "now" to test it. I was hoping for some libraries and examples or >> some simple shift registers examples, which could be transferred to this, >> but no luck. >> >> So if anyone, is interested in this "problem" and shows some interest, I >> am willing to show more, fotos, schematics, but for now, I don't want to >> post anything (our school algorithms would thing I copied from here and I >> would be flagged for plagiarism, stupid, I know, but no point in risking >> it...). So thanks everyone for any comment. >> Looking forward to interesting conversations. >> >> PS: probably to catch your interest, here are some unrendered 3D models >> from Altium. >> > -- 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 on the web, visit https://groups.google.com/d/msgid/neonixie-l/91a90528-952f-47c7-bc08-11e087080222n%40googlegroups.com.
