Use the SPI Library - it handles the bitbanging and the timing for you (I’m
typing this on my phone, so it is a bit rough)
You may need to use a different SPI mode. There are four possibilities
You will also need to figure out which pins the SPI library uses.
In setup:
digitalWrite(LEpin, LOW); // Initialize latch
SPI.begin(); //
SPI.setDataMode (SPI_MODE3); // Mode 3 SPI
SPI.setClockDivider(SPI_CLOCK_DIV128); /
In loop:
To write data:
Write a byte
SPI.transfer(iTmp);
Lock data:
digitalWrite(LEpin, HIGH);
digitalWrite(LEpin, LOW);
> On Oct 4, 2018, at 10:24 PM, Kevin A. <[email protected]> wrote:
>
> I forgot to add that two details not visible in my PCB are that the polarity
> (POL) line on the HV5530's is pulled high, and the blank lines (BL) are
> connected to the microcontroller on a PWN pin, as defined in the code.
>
>> On Thursday, October 4, 2018 at 10:04:07 PM UTC-4, Kevin A. wrote:
>> Hi everyone,
>>
>> My name is Kevin, and I've recently developed a nixie obsession. This seems
>> like the place to be for those who are obsessed with all kinds of glowing
>> tubes!
>> Also, I'm currently working on a project to make a 10 digit display from
>> NL840 tubes, with dots and a plus/minus NL843 tube (primarily for a
>> calculator). It is driven by four Microchip HV5530 serial to parallel
>> converters and an arduino (12v to 3.3v logic level shifter of course). Here
>> is a quick demo video I've made of testing the display (haven't quite
>> figured out the software yet; first time!):
>>
>> https://www.youtube.com/watch?v=468QV6E7rm4
>>
>> Currently, I've found myself getting stumped with the software aspect of
>> driving these four daisy chained HV chips. They are essentially 32 bit shift
>> registers back to back, for a total of 128 bits. Some of the outputs are not
>> used too, please see the pcb (I didn't make a traditional schematic). If
>> anyone can see my bitbanging code that was used in the video
>> (https://github.com/verrucktmechaniker/nixie-calculator/blob/master/bitbang_test)
>> and my board layout image (https://postimg.cc/LnKstKLh) and make sense of
>> how to control this, that would be awesome! I definitely plan on releasing
>> this project as a step by step do-it-yourself once I get some help and
>> figure out the software/control side of things!
>>
>> Thanks
>>
>>> On Wednesday, September 19, 2018 at 11:03:23 AM UTC-4, neonixie-l wrote:
>>> Ladies & Gentlemen,,,
>>>
>>> We are getting a steady stream of new members - it'd be great if, instead
>>> of just lurking, you could introduce yourselves with a bit of detail about
>>> your interests, what you've built or intend to build/dream of building.
>>> Even what gets you up the morning and makes you smile!
>>>
>>> Even existing members (there are over 1,000) could chip in - there's some
>>> great stuff around...
>>>
>>> Welcome, one and all to this great community!
>>>
>>> Nick
>>>
>>>
>
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