Hi
can anyone suggest a simple working idea to make this work
I need. A circuit perhaps using a DPDT relay which will allow a mains powered 12v transform supply to a 12v air pump to switch to a backup 12v battery supply to the air pump in the event of mains power loss, and then back to the transformer when mains power is restored.
I would appreciate any suggestion.
Thanks
Les
can anyone suggest a simple working idea to make this work
I need. A circuit perhaps using a DPDT relay which will allow a mains powered 12v transform supply to a 12v air pump to switch to a backup 12v battery supply to the air pump in the event of mains power loss, and then back to the transformer when mains power is restored.
I would appreciate any suggestion.
Thanks
Les