Those dimmers would work great. From what I have looked at they are more than building a PID controller, but hit up Dave I bet he would know best where to get them.
I agree with the thought that those chinese SCR's are going to need cooling. Likely want to mount it in a suitable electrical box and add a cooling fan to it since you will be running it hours on end. Oh and put it somewhere safe when you use it the first 5-10 times, you really need to get comfortable with anything you use.
as far as those items you listed from amazon I would just pick up the one with the best rating.
I agree with the thought that those chinese SCR's are going to need cooling. Likely want to mount it in a suitable electrical box and add a cooling fan to it since you will be running it hours on end. Oh and put it somewhere safe when you use it the first 5-10 times, you really need to get comfortable with anything you use.
as far as those items you listed from amazon I would just pick up the one with the best rating.
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