PWM driver IC for lots of servos?

If you are driving analog hobby servos, like for model aircraft, you can drive many of them from a single 40pin AVR. I've driven as many as 16 at once but it's possible to do even more. You just have to send a pulse to each servo that is between 1ms and 2ms long.

Even if you only send the pulse to each servo once every 10th of a second the servo will still move to the desired position. If you use no other i/o, just pre-programmed motion, you could, in theory, drive 32 servos from a single avr like the atmega16 or atmega32 or atmega644, or even, my favorite, the atmega1284. Ray Moore ray@bethnray.com.

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