ADCIN signal conditioning?

[ScaleRobotics]

You could try Darrel's averaging include file.

http://sites.picbasic.net/index.php?...d=70&pageid=25

[droptail]

You could try Darrel's averaging include file.

http://sites.picbasic.net/index.php?...d=70&pageid=25

Thanks,
I'll have a look see.

[Charles Linquis]

If your value goes to zero, there is something more wrong than a little noise. I have found some chips that don't work properly with ADCIN (18F2221 for example).

Try the following:

Result = 0
Channel = 1                     ; Whichever 
Channel = Channel << 3   ; offset the bits

ADCON0 = %11000001 | Channel  ; OR the channel into the reg.

For X = 0 to 9

PAUSEUS 10
ADCON0.2 = 1     ; Start conversion
PAUSEUS 2         ; Guarantee min time
WHILE ADCON0.2:WEND   ; Wait until done
Result = Result + ADRES
Next X

Result = Result/10

Result is, of course, a WORD var

[droptail]

Charles,

This sensor pulses hi to low. I suspect some of my sampling is reading on the low part of the cycle. Thats why I slowed way down the sampling time to 20ms.

ADC has worked well for me on this PIC.

I will look at your subr.

Thanks

[Charles Linquis]

Charles,

This sensor pulses hi to low. I suspect some of my sampling is reading on the low part of the cycle. Thats why I slowed way down the sampling time to 20ms.

An analog sensor that pulses high to low? I don't understand. What sensor are you using.

[droptail]

I am getting better results using PULSIN since the sensor is pulsing as stated before.
I still need to condition the results, however.

[Charles Linquis]

You mean that you weren't concerned with the analog level of the signal at all? Only its duration?