PIC control ESC

[mike]

Hi all, need help and suggestion on ESC control..
How ESC can be control, it's control by using PWM?
thanks.

[ABSF]

Can you be a little more specific? At first glance, I thought "ESC" is the Escape key on the PC.

Allen

[mike]

Sorry for this...
ESC is electronics speed control...
thanks

[aurora]

By electronics speed control, do you mean motor? Then yes, most common method is PWM.

Er, does that answer your question?

[mike]

thanks aurora...
but some said it control by PPM..
what different PPM and PWM?it's same?
thanks for reply..

[aurora]

PWM is the common method of control for motor. I don't think you can use PPM for motor (?) The last time i encounter PPM (pulse position modulation) was for wireless module (used in RC hobby, i.e. helicopter, airplane). I'm not sure if, the PPM i know is the same as what you are asking. So here goes:

PWM emits in constant frequency, i.e. every 20ms (50hz), One PWM is dedicated for 1 controller (motor).

PPM is a communication protocol, i.e. to send command for a series of motor. It is mainly use in RC hobby because RC used servo motors. In RC hobby, a single PPM transmitter can control up to 8 servo motor. But don't get this wrong, the PPM receiver actually has 8 PWM module, to control each of the the servo.