Build an Intercom using two old Telephones
2:27
YouTube0033mer
Build an Intercom using two old Telephones
This video will describe how to build an intercom using old telephone sets. A battery, resistor and a wall phone jack is all that is needed. Parts needed: 9 volt battery 330 ohm 1/2 watt resistor Battery clip and cable Dual phone jack plate Plastic electrical box * Note A higher voltage battery can be used together with a higher value resistor.
125.3K viewsNov 19, 2016
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