Averaging AtoD samples

[HankMcSpank]

Hey Hank,

You could try Melanie's number sorting routine. She talks about dumping the upper 4 and bottom 4 numbers. You could do something similar. http://www.picbasic.co.uk/forum/cont...orting-Numbers Something like

Thanks (as ever) for the input - re Melanie's number sorting code......that's what I was doing in post #14 above - it works, but this weighted average has got me curious now!

Whichever averaging/sorting method I eventually use will ultimately go into a frequency detect PIC circuit - I use the PIC's onboard comparators...but the sample 'counts' are a little bit erratic ....eg for Kkhz I get a stream of 'counts' in or around 5000 (which is correct for the clock speed)...but then every 10-12 or so readings, in comes a sample that way out of whack - so it's a case of which method to go with to best eliminate that gracefully!