Caecilius wrote:
That's interesting. PID control might be a bit OTT for my
application, but it's cheap enough.

Might come in handy for other things too. I put one in a case to control
the soldering oven, but it gets borrowed for other things.

I'd hope that there's something with a smaller temp range (0 - 1300 C
looks like it's designed for a kiln) and an associated increase in
accuracy. I'd like something like 0.5 C or maybe even 0.1 C if
possible.

You might be able to change the thermocouple type - not sure if there's a
setting for that (it'll depend on which clone it is).

I'm surprised that a PID controller uses a simple SSR output. I would
have thought that a "dimmer" type circuit using a triac for switching
would be better for that.

I don't think it matters - the thermal mass is such that giving a blast of 2
seconds on / 2 seconds off is just as good as 50/50 duty cycle at 50Hz - and
less buzzing.

Theo