How can I switch from a 12v DC source to a 9v DC source? Something like an automatic transfer switch?
The main source is the 12v. If the 12v goes off, it should automatically change to the 9v. But once 12v comes back it should switch back to 12v.
Is there any device that does it automatically (hope so ) or do I have to do it using a μcontroller? Where should I look?
The main source is the 12v. If the 12v goes off, it should automatically change to the 9v. But once 12v comes back it should switch back to 12v.
Is there any device that does it automatically (hope so ) or do I have to do it using a μcontroller? Where should I look?
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