im reciprocating the Arduino on a breadboard. i have a problem with the 5V supply. I hav visited dozens of forums and tried all the combinations of capacitors combined with 7805(for decoupling) IC that are shown in the images by various authors.
Why do we need to use for capacitors first of all ? All the combinations give an output little less than 5V. What to do ? I need 5V exact or a little above. i need the exact combination of capacitor values to obtain an exact 5V output across 7805.