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 Electronics
 Telephone
 Busy Phone Power
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revdak
New Member

USA
1 Posts

Posted - Sep 06 2007 :  12:39:10 PM  Show Profile  Reply with Quote
Can the circuit be modified to allow it to be powered by a 9Volt battry rather than the phone line?

David A. Keller

audioguru
Nobel Prize Winner

Canada
4218 Posts

Posted - Sep 06 2007 :  2:23:40 PM  Show Profile  Reply with Quote
It would be a lot better if the phone-line-busy circuit is powered by its own power supply.
The modification is easy.
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