12F1840 ADCIN troubles, help needed :(

[richard]

Just it is a bit silly, why it can be possible to have same pin both as ADC IN and LOGIC OUT at same time (circuitry-wise)

why is that you can drive a car for hundreds of miles in low gear , and with the handbrake on ?

is that any different ?

just because you're in the drivers seat with the motor running does not mean you are proficient

[CuriousOne]

That's not fair comparison, the situations is like when you can have zipper closed on your pants, but your junk still hanging from zipper

A side question, I'm going to monitor 9VDC battery voltage via ADCIN. To reduce current consumption, I'll have to increase resistance of both resistors, but this will also make circuit less noise proof. How do you think, what will be the gold cut in that case?

[pedja089]

Maybe this will help you.
http://electronics.stackexchange.com...ery-monitoring

[CuriousOne]

Thanks, but that is a bit complicated - no need to save that much power. The battery voltage to be monitored is around 11V (3S LiPo), so divider with 470k/100k resistors should work just fine?

[pedja089]

Look at last post.

[CuriousOne]

Tried that already. Too small values and I have too large ripple going on (current consumption is 20-25A). So I settled with 750k/150k+1nf combo, works just fine.