I am putting together a single keggle eBIAB system as the first phase of going all grain with bigger batches. However, what I have is a cheap PID that doesn't do manual control, which means it won't work for the boil. (Obviously, buying a new, correct PID would be the smart solution, but I'm trying to not spend any more money) I ordered the cheap PWM circuit that was mentioned on another thread to be able to switch to manual control of the element for the boil. I've been trying to figure out what new relays and switches I would need (which actually could have added up to teh coast of a new PID anyway) when a light bulb went on...
Do I really NEED extra relays and switches? Can't I just wire up the PWM control between the PID and relay input? If the PWM is set to 100% output, the PID should be happy as a clam for controlling mash temperatures. When I'm ready to boil, I can dial down the PWM knob. The PID would still be sending its signal, but that signal would get intercepted by the PWM and scaled back.
Best idea since sliced bread? Or would this not work and possibly end up damaging the PID, PWM or both? It's been a LONG time since I took an electronics course, and it was never my best subject. Thanks for teh sanity check and any other advice.
Do I really NEED extra relays and switches? Can't I just wire up the PWM control between the PID and relay input? If the PWM is set to 100% output, the PID should be happy as a clam for controlling mash temperatures. When I'm ready to boil, I can dial down the PWM knob. The PID would still be sending its signal, but that signal would get intercepted by the PWM and scaled back.
Best idea since sliced bread? Or would this not work and possibly end up damaging the PID, PWM or both? It's been a LONG time since I took an electronics course, and it was never my best subject. Thanks for teh sanity check and any other advice.