Electronic Circuits
C=Circuit Diagram
Privacy Circuit
[C]
Telephone Record Control (3 transistors) [C]
Extremely Simple Telephone Record Control (only passive components) [C]
Telephone "Hold" With Music [C]
Telephone "In Use" Indicator [C]
Extra Phone Ringer [C]
Ringing Phone Light Flasher [C]
FM Telephone Bug [C]
Telephone Ring Generator Using Small Power Transformer [C]
Remote Control Using Telephone [C]
Old phones as an intercom [C]
Doorphone Intercom [C]
Simple Intercom System (3 transistors) [C]
Telephone Record Control (3 transistors) [C]
Extremely Simple Telephone Record Control (only passive components) [C]
Telephone "Hold" With Music [C]
Telephone "In Use" Indicator [C]
Extra Phone Ringer [C]
Ringing Phone Light Flasher [C]
FM Telephone Bug [C]
Telephone Ring Generator Using Small Power Transformer [C]
![[C]](http://www.bowdenshobbycircuits.info/page11.htm#ring1.gif){kind=link}
Remote Control Using Telephone [C]
Old phones as an intercom [C]
Doorphone Intercom [C]
Simple Intercom System (3 transistors) [C]
Useful Links
R=Resource
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