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Ingvar
Thanks for the clever suggestion.Did you use it and with what results/observations?
I suppose that a 2,5V stable voltage ref is the obvious need BUT maybe a volage divider would be better...

Ingvar I did test what you suggested and it was RIGHT.
In other words it does exactly the same as FP routines do and at lesser code space cost.
Ofcourse it doesnt solve my problem but it can be...

Ingvar I think you are absolutely RIGHT and I will test it as soon as I can.
Since the ** multiplication places the result in the upper 16 bits it is I believe the same with divide by 65536 as you...

Melanie you are right that I already use this "fake 16 bit" method which in turn made me use the FP routines in order to have math results.The reason is that although I display 2 decimals I calculate...

Dear All
I replaced my own routine for ADC readings with Melanie's just to see if there would be any difference in displayed voltages.
I found out that there was always an increase in steps of...

Thank you for responding
I will try to describe the problem I face better in order to justify why I think that something like the stable ADC mentioned in my first post might solve it.
A 12f675 chip...

Dear friends

Recently I came across an AVR application note about an intelligent charger
design based on their controller line.
There was a so called STABLE ADC READING FUNCTION
(not...