more_mods,Originally Posted by more mods
I would highly suggest going with the servos. Even though they are PWM, they are very easy to setup using just one 555 timer IC. You could build your entire circuit with just the 555 and two transistors (plus supporting components, of course).
On the other hand, if you wanted to use a DC motor (not sure about the advantages...), then I would suggest using a H-Bridge, not only would you be able to control polarity, but also speed. But if you use the DC motor then you would also need to setup stop points for the motor, its not that much more complex, but why bother if the servos can take care of it for you.
Let me know which one you are interested in and I'll draw up a quick schematic for you.