Built it - now ?'s
Hi RB;
Its built, the 100W version, and I am playing with it now. Seems like it will do the trick. I left the FET out for the moment, just trying to find the limits. I originally powered with 12V un-regulated, ooop's on that, I just read your post again, will get 12 regulated on it next.
Does the zener diode need to be of a larger wattage? And just exactly which component is sensing the temperature? I thought its supposed to be the 1st BC337, then thought about it and considered the zener but that makes no sense. Please keep in mind - rookie - here. I'll get back to playing with it now and hopefully find the limits I need.
Oh yea, on both ckt's. the hyst. resistor is listed as 330K ??? I gather you mean that's a good value to begin with and adjust for the target from there?
Thanks for your help.