Learning electronics is something fun to do and for the last 4 months I've been designing a circuit that will remove the power from the motor when it is stalled.The criteria for my circuit is completely arbitrary but I set my goals on completely discrete components with no fancy controls like PWM.
Is it possible to contol assorted small DC motors (some low amps /voltage , some high amps/ voltage) with a single pot on the base of a transistor.
The problem I'm having is that I can bounce from motor to motor and it works but the way I have it designed I have to adjust a pot at the collector and a pot at the base. I'd really like to just get rid of resistor at collector and use the transistor as more of a resistor. I have did a fair bit of research and have concluded that transistors don't work well as resistors due to beta moving fall over he place. :/ I could just put a pot on the base but without the resistor on collector the beta would be all over the place, atleast from my limited understanding of beta stability. I was thinking negative feedback (collector - base), would that work? Thanks in advance