PICs will drive servomotors directly. You need a program that will output a pulse about 0.5 - 1.5 ms long, every 20 ms. 0.5 ms will give one end of travel, 1.5 ms the other end.
The voltage levels output by a PIC running on 5V are just right to drive a servo.
Power for the servo is 5V and is left on all the time, not controlled by the PIC.
Yes, of course it is 1-2 msec. Also I'm not sure a R/C type servo is correct for what the OP was asking for as he specified a 70 rpm speed and unless a R/C servo is modified it will not turn continously.
There is a difference between a servo motor (one element of a servo system) and a R/C servo device (a self contained servo system).
Yes, of course it is 1-2 msec. Also I'm not sure a R/C type servo is correct for what the OP was asking for as he specified a 70 rpm speed and unless a R/C servo is modified it will not turn continously.
There is a difference between a servo motor (one element of a servo system) and a R/C servo device (a self contained servo system).