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Im looking to measure the pulse widthk7elp60 wrote: Are you wanting to measure the pulse repetition rate? or the pulse width?
How wide is the pulse, and what resolution do you need?digital said:How would you go about counting the duration of a very small pulse in precision of microseconds ?
Ron H wrote: How wide is the pulse, and what resolution do you need?
digital said:Ron H wrote: How wide is the pulse, and what resolution do you need?
0.5 to 2 miliseconds, im going to need to measure several different pulses within that range so it needs to be relatively precise.
Relatively precise means nothing. How you do this depends on a real answer.digital said:Ron H wrote: How wide is the pulse, and what resolution do you need?
0.5 to 2 miliseconds, im going to need to measure several different pulses within that range so it needs to be relatively precise.
digital said:Ron H wrote: How wide is the pulse, and what resolution do you need?
0.5 to 2 miliseconds, im going to need to measure several different pulses within that range so it needs to be relatively precise.
eventually radio control but for now Im only treating it as a serial data communicator using PWM between one wireNigel Goodwin wrote:
Would these be radio control servo pulses?.
The smallest pulse width will be 0.5ms, but will be in 0.5ms incriments, 15 times for 15 commands at most. Its hard to predict exactly how much resolution is actually going to be really used in the circuit but I would like an accuracy of atleast 1%Optikon wrote:
what is the _smallest_ width within 0.5ms to 2ms that you anticipate needing to measure?
digital said:Whats the 1st and most accurate method for measuring pulse width ?
Whats the 2nd ?
Any other reliable methods/ideas ?
What about constructing a syncronous 7 segment display clock(probably using 4029's) but clocking it faster than 60Hz, starting with values 1 sec and smaller, and connecting it with a stop/start interface to display how long a specific pulse was, do you think that this method would work :?:
digital said:Can propagation delay affect my results significantly, when counting such small values, would propagation delay make any difference if I where to use a pic vs discrete logic :?: