Stable ADC readings

[HankMcSpank]

So to summarize 'in speak' that won't scare folks who thought if/then statements were an uinsurmountable hurdle.....are we saying that using the ADCIN is not optimum...and if not could someone please post a chunk of code to do this in an alternative method?

[mackrackit]

http://www.rentron.com/PICX2.htm

[HankMcSpank]

Excellent.....many thanks, I shall use that code gratuitously.

[Ioannis]

Have you tested this fast averaging with Hysterisis by Darrel:

http://www.picbasic.co.uk/forum/cont...ith-hysteresis

Ioannis

[HankMcSpank]

Yes I have (& very good it is too) , but I'd rather have this jittery AtoD values 'cleaned up' at the source (rather than putting averaging in place to address unstability caused by avoidable factors)

[Bruce]

Just include an RC filter on the A/D input, and put the PIC to sleep just before enabling the A/D conversion. This returns very stable readings in most applications with a stable power supply or Vref.

[fratello]

Nice subject !
I use a similar code for reading the over-current of one DC motor :

check:           
 vt  =0
 vs  =0
 grup=0
 cnt =0
 pause 50					
 for cnt = 1 to 10
 	adcin 3, adval
 	vt=adval * 5000
 	vt=div32 1023
 	grup=vt+grup
 	pause 5
 next cnt
 vs=grup / 10
      if (vs > checkin) or (T1Count > 50) then 		   
  	     	gpio.0=0
           	gpio.5=0
      endif

If the averge of 10 readings it's bigger than checkin value (or time exceed 5 seconds) then gpio.0 and gpio.5 goes low.
It's one good ideea to use ADCON instead ADCIN ? How to do this and keeping average of 10 readings ?