Using an 18 V cordless circular saw, but for a different purpose than intended. Apparently the switch is either all or nothing (makes sense IMO to help avoid binding during a cut).
If variable speed DC motor requires a large heatsink, how about just four different speeds using simple switches? Someone in the design group answered this question with a drawing but I cannot locate it in the archives.
I figure that's easy just by putting batteries in series and then dial switching in between the batteries. But that would wear the batteries unevenly. Could anyone please illustrate a four position switch that would provide zero plus three positive voltages, maybe switching the batteries to parallel so that current drain is even on all batteries?
Thank you.