So the only difference was the PID coefficients, excellent! You mentioned that this also made the T12 tips regulate faster, but I suppose that that would still be with the same old 4.096 V reference?
I'm trying to figure out how your firmware works, and you have been quite good at documenting the variables and flow for the interrupt part, but the meaning of several of the main variables and some of the functionality, especially the button trickery, escapes me, could you maybe document them just as thoroughly, or perhaps give me some hints on what they do?
You mentioned that you had a later version of the firmware than the one on the first page, could you possibly post the updated version that also had support for the JCB tips? I'm just looking for the improved PID regulation, as I'm setting out to modify a fake Hakko 951, want it to be better than the original, and possibly even help people like neslekkim who got a raw deal when ordering what they tought to be a real original. I must say, they're not all bad, works pretty good considering.... If you can live with having to calibrate it yourself... duh..!
Internally they are built quite similarly to your controller, with some shortcuts and differences like not being synced to the AC period, but they regulate quite OK, albeit only on 50% power. My version, and neslekkims at least, are actually using old schools DIP chips, so I'm going for something like a drop in replacement with a, but probably on a small board for some pin rearrangement with an RS232 or USB connection and a sync input.
