Quote Originally Posted by jsondag View Post
You can use PWM from the attiny to control the speed. The H-bridge is what reverses the direction. It's just an input line on the H-bridge to reverse the polarity, and thus, direction of the motor.
I meant, I don't really see the point in using the reverse, I don't feel as though it could be precise enough to pump out exactly enough water to bring the level back to proper height to resume the print or even whether it could pump out fast enough so the prints don't take hree times as long, but I do agree with the PWM for speed control