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 I said it was called FIRST Robotics and the coolest thing I'd seen that day was a 150lb robot balance with another one on a teeter-tooter and and then score basketballs from 30 feet away. - Siri [more] |
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servo PWM sampling-what Fosc should I use?
Hi.
my goal is to sample a servo pulse from an R/C receiver, and I'm not sure what XTAL to use, I mean, what is the minimum Fosc I should use? if a 4MHz = 1MHz internal clock, so with a 1:1 prescaler I should get 1 sample every 1 mS. if I'm correct, a servo's pulse is between 0.9mS and 2.1 mS, meaning I need something quicker, am I correct? will a 20MHz XTAL be the answer? thanks, Ran. |
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