I have the 24v PWM controlled pump and I use it for recirculation during mashing and wort transfer during my brew day. It’s hooked up to a fixed 5v control voltage and an on/off switch. I would very much like to be able to control pump speed, preferably using a manually operated knob or similar. Could you please advise on how to achieve this?
I have a spark 3 used for fermentation temp control and I think I understand how to make it control the pump, but I don’t want to use a web UI to switch the pump on and off while mashing. Can I hook up an analog knob to the spark for input?
Some suggestions or pointers would be much appreciated.