ADC Averaging

Hi,

Can anyone let me know how is the ADC averaging is done?

How many values I need to read before averaging? Will this act as filter?

The I am reading a thermistor sensor value.

Please let me know.



Thanks
Sach

The amount of data you collect before averaging is pretty much a personal prference. If the value does not swing much then more is a waist of time. Large swings withe the most being mid range then you need to collectet enough to cover it all.

To do he averaging. Set up a loop reading the ADC for the amount you want to collect. Keep adding the VAR to it's self then divide when finished.

Covered here

http://www.picbasic.co.uk/forum/show...unning+average

Quote:

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Originally Posted by mackrackit

The amount of data you collect before averaging is pretty much a personal prference. If the value does not swing much then more is a waist of time. Large swings withe the most being mid range then you need to collectet enough to cover it all.

To do he averaging. Set up a loop reading the ADC for the amount you want to collect. Keep adding the VAR to it's self then divide when finished.

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Hey,

for 10 bit ADC, if the value is not ranging much, what should be the number of samples to be taken?


Thanks for the reply.

Take a couple of dozen samples...

Sort them...

Discard the top six values...

Discard the Bottom six values...

Sum and average the middle twelve.