I have two DC power sources 5.0vdc each.
A - primary
B - secondary
B is always connected.
Trying to figure out a circuit that would use source A unless its not available.
There are a lot of of OR-ing controllers that allow you to do this, but they depend on small voltage difference between the sources and basically select the source with higher voltage.
Both of my sources are at 5.0V but "A" must have priority.
Thank you,
Boris.
A - primary
B - secondary
B is always connected.
Trying to figure out a circuit that would use source A unless its not available.
There are a lot of of OR-ing controllers that allow you to do this, but they depend on small voltage difference between the sources and basically select the source with higher voltage.
Both of my sources are at 5.0V but "A" must have priority.
Thank you,
Boris.