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| General Electronics Chat This forum is for general chat about electronics, eg: Dont know what a part does? Dont know how to read a circuit? Want to get an opinion? |
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21st October 2009, 11:40 PM
| #16 |
I have a 12v DC paging transmitter. Want to create a battery backup power supply using a 9v battery. So when I lose 12v the 9v takes over. Any thoughts?
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| backup, battery, relay |
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