Hello,
I got a working circuit doing it using Potentiometer. When the voltage across is below 6 volts it is in in one direction (6 in stop and 0 volts for high speed) and when it's above 6 volts it's in the other direction (6 for stop and 12 for high speed). the circuit is then concocted to kind of H-BEIGE circuit
I want to "update " this circuit so that I can control the speed and direction using dip-switches (4 dip switches for 16 types of speed (0-zero, 15- high speed) and 1 switch for direction). my problem is how to create this kind of range of range unsing only BJT, mosFET and operational amplifier. I thought about using somehow voltage summer using operational amplifier, but I don't see how because in one hand I need to choose direction and in the other hand I need to choose the speed and it the Potentiometer it was all together.
I got a working circuit doing it using Potentiometer. When the voltage across is below 6 volts it is in in one direction (6 in stop and 0 volts for high speed) and when it's above 6 volts it's in the other direction (6 for stop and 12 for high speed). the circuit is then concocted to kind of H-BEIGE circuit
I want to "update " this circuit so that I can control the speed and direction using dip-switches (4 dip switches for 16 types of speed (0-zero, 15- high speed) and 1 switch for direction). my problem is how to create this kind of range of range unsing only BJT, mosFET and operational amplifier. I thought about using somehow voltage summer using operational amplifier, but I don't see how because in one hand I need to choose direction and in the other hand I need to choose the speed and it the Potentiometer it was all together.