Hi, I'm working on a circuit where I need to connect about 15 servos to a PIC chip on separate pins. Each servo will have a wire about 1m long.

In a previous thread I started about interference someone said "connecting long flying wires directly to the inputs of the PIC usually isn't the best design practice". I want to know if the same also applies to outputs.

Should I have something (optos/transistors etc) between my PIC and the servos?

Also, how many volts do servos need on the signal line? I'm using digital servos that need a supply voltage from 5 to 7.5V. My PICs run on 3.3V which should be more than enough for the servo signals but I haven't seen anything to confirm this.