That's better.
It's been a while since I've seen individual logic gates...
These are a few 555/556 timer based circuits I was thinking of:
http://hades.mech.northwestern.edu/w..._Servo_Circuit Although, I'd probably use a 556 timer (dual 555's) for space and convenience...
http://members.tripod.com/Sarconastic/servodriver.html
http://www.seattlerobotics.org/encod...Excerciser.htm