I have arduino UNO which has 2 (5v) pins on it. I am giving 5V exactly on one (5V) pin and measuring on the second (5V) pin with the help of multimeter, it is showing 4.76V. Why??? I cant measure on the second 5V pin if i am giving power 5V to the first 5V pin ????
I thougt if i give directly 5V to 5V pin , it must appear 5V. Actually i want to know the Aref and i have read wharever would appear on 5V pin it would be called operating voltage and that operatinmg volatge becomes the Aref volatge exactly.
Is there a way to measure the Aref or 5V pin voltage with DMM ?
Yes I am sure , i have measured it with DMM and osciloscope then i gave it to Arduino Uno. One thing what i am thinking is , may be its not possible to measure the voltage on the same pin where you are providing the power (beacuse of sinking phenomenon). Is it true?