how to interface . . . . ???

[nasleh2]

Dear All :

I have a question :

how can i make an interface

between a PIC16f877 with two servo motors ?

and

From where can i get a motor with torque

can load approximately 500 gram , with 70 rpm ?

 

[Diver300]

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.

 

[Mike - K8LH]

Isn't a Servo pulse typically 1.0 to 2.0 msecs long with a 1.5 msec pulse placing the Servo in the "middle" of its travel?

 

[Leftyretro]

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).

Lefty

 

[Nigel Goodwin]

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, basically there's far too little information in the original question.

 

[nasleh2]

thanks to all,

but my quistion was about interfacing not programming.

How can i konw required elements such as resistors,inductors and capacitors needed?

and i know that i have to put Hbridge . . . . .

BUT HOW TO INTERFACE BETWEEN PIC AND MOTORS CIRCUITLY ?

 

[erosennin]

You consult the master... and it tells you the following...

https://www.rentron.com/SerialServo.htm

**broken link removed**

https://www.rentron.com/PICX5.htm


Some say that he thought Star Wars was a documentary... all we know is, he's called The Google...