Wido + 5v external power + USB?
Account cancelled 2014-12-14 06:44:48 1507 Views1 Replies I have a WiDo board that is running an external LED matrix. The LED matrix consumes a fair amount of current, so it is powered by a 5v external power supply.
I'm also powering the WiDo from the supply, by running it into the +5v rail (via one of the prototyping shields).
As I understand it, that
My concern is: is this safe to plug into USB while this external +5v supply is attached? I'm worried about complications from the USB power, because they are both nominally 5V.
I don't want to burn out the board or my USB port!
I'm also powering the WiDo from the supply, by running it into the +5v rail (via one of the prototyping shields).
As I understand it, that
My concern is: is this safe to plug into USB while this external +5v supply is attached? I'm worried about complications from the USB power, because they are both nominally 5V.
I don't want to burn out the board or my USB port!
2014-12-15 22:47:19 Hello Apullin,
It is OK to power matrix from an external power. But it is better to share GND together.
If you do not rest assured, you could take a simple photo about your connect before you give it a power. I could check it. Grey.CC
It is OK to power matrix from an external power. But it is better to share GND together.
If you do not rest assured, you could take a simple photo about your connect before you give it a power. I could check it.
Grey.CC 