I'm starting a separate thread on this topic that was posted from the introduction discussion
As with any serial shift-register, the biggest source of trouble is timing-related, such as not accounting for setup and hold-time requirements. *First question*: Are you able to get reliable and predictable data into the first HV5530 that is connected to your controller ? If not, then the entire shift chain will be broken, aka "garbage-in, garbage out". This needs to be solved first. I took a quick look at the code that was posted and did not see any obvious issues, so I think your setup/hold timing getting into the first HV5530 is correct. Do you have level-shifters between your controller and the HV5530 ? The logic portion of the HV5530 is intended to operate at 12V, whereas most controller devices have 3.3V logic levels. If you dont have a level-shifter, then you are operating outside the device spec and you venturing into a jungle of unpredicatbles and uncontrollables. I know some neonixie members have posted about their good results with HVxxxx devices operated outside of spec, so if you are adventurous then go for it. All I can say, based on my own experience, is that when you are not datasheet compliant, expect trouble. I had 3 completely unrelated problems with a 16-channel A/D converter on my current project, and all of them turned out to be either my misinterpretation of the datasheet, or my failure to pay attention to a detail in the datasheet. Once I got those corrected, it's been fine ever since. *Second question*: If the first HV5530 is operating as expected, what about the next one in the chain ? -- 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 neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/dbc7ce88-a6ab-4605-9247-97209307d02f%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
