This simple DC motor driver circuit uses a 741 operational amplifier operating as a voltage follower where its non inverting input is connected to the speed and rotation direction of a potentiometer VR1. When VR1 is at mid position, the op-amp output is near zero and both Q1 and Q2 is OFF.
When I was 11 I started playing with electronics, influenced by a friend in school. Eventually I moved onto software projects, since it's cheaper, it's easier to change components and you don't burn your fingers as much! But lately I've been playing again with electronics — last year I bought an Arduino, and this year I've been tinkering with some analogical circuits.
This schematic is for a small robot that I'm planning. I'll keep the blog updated on the project.