Thanks nigelwright, is program free? I will test it just curious what it does, I have a while ago search a program for a smps mig welder, I did now put in a big transformer, but smps is mucho better, maybe you now a solution, I think even this program because it has feedback is usable, I need then a very stable and clean supply for the pic, otherwise with welding spikes can kill it or disturb program whit desastreus consequenses for the smps itselfs, I have programmers for most of these chips.
Driving the mosfets needs then a couple of transistors in totempole and a driver transformer, because these pic has not enough current and are not designed for that.
In principle you do jus emulate a normal chip and have now own control, completely, I do see also other chips who are be used I have somewhere a program for that who do mig for example, on a atmegachip. I do find pic more easy.
I have to look at the transformer, because the primairy is quite low in induction, and I need to fill the coilformer, winding these need some experience.
As programming concerns, I can not do that, never learning that, and not so easy as I get older, now almost 63.
But I did undo hasp dongles in past and even everkey, so the NOP I see in your programs is much used that day
But times a changed, it is not interesting anymore to play with that, and it is years ago.
thanks for the info,
kees
