I want to make $10 stir plate featured on the HomeBrewTalk home, but I would like to add a potentiometer to adjust speed. Mostly just because I think it would be cool. Ebay has several different types with different resistances. I was planning on using a 12-volt cell phone charger for the power source as outlined in the HBT project. Could someone tell me which potentiometer and knob I need? Any ideas how to combine these two projects? Would a child's pencil box work in place of the plastic sheeting or cigar box?
http://mad-science.wonderhowto.com/...ally-controlled-cigar-box-stir-plate-0134284/
https://www.homebrewtalk.com/entries/diy-stir-plate-under-ten-dollars.html
http://mad-science.wonderhowto.com/...ally-controlled-cigar-box-stir-plate-0134284/
https://www.homebrewtalk.com/entries/diy-stir-plate-under-ten-dollars.html