This DC motor ambassador ambit application a 741 operational amplifier operating as a voltage addict area its non inverting ascribe is affiliated to the acceleration and circling administration of a potentiometer VR1. When VR1 is at mid position, the op-amp achievement is abreast aught and both Q1 and Q2 is OFF.
When VR1 is angry appear the absolute accumulation side, the achievement will go absolute voltage and Q1 will accumulation the accepted to the motor and Q2 will be OFF. When VR1 is angry to the abrogating accumulation side, the op-amp achievement switches to the abrogating voltage and Q1 will about-face OFF and Q2 ON which reverses the circling of the motor's direction.
As the potentiometer VR1 is confused against either end, the acceleration increases in whichever administration it is turning. The TIP3055 Q1 NPN ability transistor has a beneficiary accepted specs of 15A and VCE0 of 60V DC. The MJE34 Q2 PNP ability transistor has a beneficiary accepted specs of 10A and VCE0 of 40V DC.
