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Ty_Eeberfest wrote: Yes, I like my boost converters to be implemented in hardware
I'm with Ty and also do prefer the hardware solution as you have seen from my project although the bigger family members of the ST Micro controllers I use for my projects do have special motor control units that possibly could be used in conjunction the the comparator to implement a boost converter.
Ty_Eeberfest wrote: Seems to me that a 6 tube clock running on 5V will be on the hairy edge, current-wise, of what some USB ports will happily deliver. But I guess the whole world runs on USB-C connectors now.
A flyback transformer will reduce the requirements for the boost converter. I think this is what I will use for my first nixie project.
Ian wrote: Transformers. Strangely, it makes the electrical design easier: you don't need special MOSFETs, because they only have to deal with the primary side, and with a 1:5 or 1:10 step up, we're talking about max 40V. However, that is more than offset by the extra fiddling that transformer circuits bring on the placing of components and getting the efficiency.
As said, I thought about testing a cheapo version implemented in the controller but I'm not sure if it's worth the few saved bucks.
Ian wrote: I spent ages on getting it to be a "real" regulator, even going to the point of using a controller dedicated just for that. I didn't manage to get good results.
Would be good if anybody could try to replicate this.