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Showing results for tags 'RC PPM'.
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PPM (pulse position modulation) is a common protocol used with radio control. It used to be the over that air protocol, but has been mostly replaced with PCM (pulse code modulation). It lives on in the form of trainer ports, radio to tx module link, and even some modern PCM receivers can output PPM (typically on the battery connector). It is also a handy way to drive up to 8 servos using a single pin of the microcontroller (and a CD4017 decoder). PPM is sort of a concatenation of several (often 8) RC servo signals in succession. The time between narrow (a few hundred microseconds) pulses deter
