SOLVED: How can I reduce ADC jitter

[richard]

i simply hate this , all these pins made into outputs , shorted to gnd , no attempt to set them low
at power up are they low? before you short it all out
worst idea ever for breadboarding , i leave all pins as inputs unless they need to be an output
all this care re floating inputs is complete bull shit. for a battery operated device it will save a few microwatts that's it.
for the finished manufactured product sure do it , for bread boarding its dangerous nonsense where every mistake will be a bad one

TRISA = %00000010                       ' Pin A1 = ADC input 1
TRISB = %00000000                       ' Pin B7 = ...not available, ICSPDAT
                                        ' Pin B6 = ...not available, ICSPCLK
TRISC = %11000000

I took everything non-essential off the breadboard (just kept my 2 power LEDs):

and all the dangerous grounds

[Demon]

I realized something was seriously wrong when that nothing circuit was taking 670mA. I added:

PORTA = %00000000
PORTB = %00000000
PORTC = %00000000

Before the ANSELx and TRISx and it's taking 20mA now, 33c with no ADC, just ADCinput set at 1023 and the HSEROUT loop.

[Demon]

... i leave all pins as inputs unless they need to be an output
all this care re floating inputs is complete bull shit....

I try to keep my development code as close to final as possible, cause I know I'll forget to change stuff back. At least this way I can fire and forget the pin initialization.

But yeah, major bonehead move on my part. I put the old PIC back in and it runs at 20mA too. Gonna leave that 1st PIC in, just in case I do some other numbnut thing.

Thanks mucho Richard.


EDIT: Now this warning will follow my code for the rest of the development.

PORTA = %00000000                       '-------------------------------------------' 
PORTB = %00000000                       '       ALWAYS SET PINS LOW FIRST           '
PORTC = %00000000                       '-------------------------------------------'