I'm wondering if it is possible for a relay to switch between two different sources. As an example, to switch from a power source 12V to 9V battery source when needed. If so, what relay should I use and how should I connect it? The signals that will be sent to do the relay switch are from a microcontroller..will this be enough for the coil in the relay to become a magnet to perform the switch?
Much thanks everyone.
Much thanks everyone.