dhenry:
[quote]which require a servo style signal not a PWM signalA servo style signal IS PWM.
Yes, but a servo control signal is a specifically defined subset of a typical true PWM signal, where the duty cycle (1-2msec) and frame rate (20-25msec) is 'standarized' amoung devices designed to receive 'servo commands'. So a servo signal has a variable duty cycle of 5% to 10%. This was to allow for several (up to 8 typically) channels of servo pulse width information to be encoded into a serial data stream, the so called PPM encoding stream used with radio control servo applications. Where as a true general purpose PWM signal usually allows for a complete 0-100% duty cycle at whatever switching frequency works best for a specific application.