Results tagged #Phone in Circuits
Phones Circuit
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Phone to sound card Schematic
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Ringing Phone Light Flasher circuit
You are asking how to connect up some lights so that when the phone rings, they flash. This is very useful in a situation were there is lots...
Ringing Phone Light Flasher Circuit
How to connect up some lights so that when the phone rings, they flash. This is very useful in a situation were there is lots of noise and i...
phone
Distinctive ringing lets phone service customers have two phone numbers with only one twisted-pair line. The standard ring cadence tells the...
phone hold circuit
Although a hold feature is standard on most new phones, a lot of us still use the origional bell phones. Those of us that require a hold fea...
Phone Spy Transmitter
Here is a very simple telephone broadcaster transmitter which can be used to eavesdrop on a telephone conversation. The circuit can also be ...
Phone circuits
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Phone-In-Use Indicator
The circuit receives its power from a 15-V wall adapter (not shown). The circuit takes advantage of the fact that th...
Tell-A-Bell
This accessory connects to phone and will activate an attention-getting 120-V bell whenever a ringing voltage appears on the ph...
Phone auto answer and ring indicator
Ring detect circuit for automatic phone answering or tone generation...
Phone light
When the phone does ring the triac is triggered into conduction by a signal applied to its gate (G) through a bilateral switch (diac), D2....
Phone Busy Indicator schematic
This indicator shows whether the phone is busy or not. When the line is busy, LED D6 off. The line voltage at points A and B attached. By th...
Phone in Hold with Music
This circuit will allow you to place a phone call on hold and if you wish to have them listen to music while they are on hold. The circuit o...
Phone Bill Calculator
This circuit is used to give "1" signal when the phone is ringing. As you can see the ct. is directly connected to the phone line. The 4.7 ...
Ringing Phone Light Flasher
I have received several emails asking how to connect up some lights so that when the phone rings, they flash. This is very useful in a situa...