I was testing arduino analog input accuracy for that i used a voltage devider with R1=18k and R2=3k ,the result was good (1bit error)
but when changed the resistor value to R1=R2=460k i get a big fluctuation around (10 bit).
I searched about that and i found that high impedance will make the internal capacitor(14pF) take more time to charge.
SO what is the solution with high impedance i realy need solution cause my preject circuit have output impednace > 100K.
High impedance:...
Arduino_high impedance source with analog input
but when changed the resistor value to R1=R2=460k i get a big fluctuation around (10 bit).
I searched about that and i found that high impedance will make the internal capacitor(14pF) take more time to charge.
SO what is the solution with high impedance i realy need solution cause my preject circuit have output impednace > 100K.
High impedance:...
Arduino_high impedance source with analog input