Hello,
If I need 8v and I want to use the power on my Arduino, can I use the 3.3v + 5v to have 8.3v? Or will it not work?
F4LLCON
No. They both reference the same ground. You can't add them in series.
Nope. Voltage is meaningless without a reference.
The pin that says +5v, is actually saying it is +5V higher in potential than GND.
Similary the +3.3V is saying it is +3.3V higher than GND.
How then can you get 8.3v if both have the same reference point?
You would need some power converter circuit to isolate the two supplies to join them together to make 8.3v, by which point the whole thing has got so complex that you are better off getting a boost converter to step the +5v rail alone up to the 8v you require.
F4LLCON:
Hello,If I need 8v and I want to use the power on my Arduino, can I use the 3.3v + 5v to have 8.3v? Or will it not work?
F4LLCON
Will not work, the 3.3v and 5v are values referenced to the same common ground so no way to series them together to optain 8.3vdc.
However there are very inexpensive switching up converter modules that can convert the +5vdc to a higher positive voltage:
Just be aware of how much current you can draw from an arduino 5v shield pin.
Lefty
Ok, thank you all for the fast replay's. I know enough now 