Results tagged #Telephone Line in Circuits
A multi-purpose radio talk lamp circuit
Ai. A2 series with the telephone line, when the sound wrong or off-hook current is passed lC, inside the arc tube made of light so wins the ...
Telephone line burglar alarm circuit diagram
Phone alarm device can monitor and prevent unlawful misappropriation of your telephone line. When someone in your telephone line and the mac...
High Impedance Amplified Telephone Line Tap
This is an amplified telephone line tap, which is designed to be minimally invasive. The interconnect to the phone line has a large input im...
Telephone Line Indicator
With the aid of an (old) moving coil instrument it is very little effort to make a simple voltmeter that, at a glance, indicates the status ...
Protection For Telephone Line
A long time ago when telephones were so simple almost nothing could go amiss from an electrical point of view, Telecom operators installed s...
Protection For Telephone Line
A long time ago when telephones were so simple almost nothing could go amiss from an electrical point of view, Telecom operators installed s...
Telephone line monitors
If you feel that somebody is tampering with your telephone line you might find this little circuit useful. It detects if there is another te...
telephone line tester
A very simple and easy telephone line tester circuit or telephone line checker circuit which can be used for testing telephone lines. .....
protection for telephone line
A long time ago when telephones were so simple almost nothing could go amiss from an electrical point of view, Telecom operators installed s...
Remote Control Circuit Using KT3170
This circuit is which enables switching on` and off` of appliances through telephone lines. It can be used to switch appliances from any dis...
Telephone Line Indicator Circuit
With the aid of an (old) moving coil instrument it is very little effort to make a simple voltmeter that, at a glance, indicates the status ...
voltage What kind of Mic do I need to connect to a pots telephone line to speak
What kind of microphone or mouthpiece I can use to connect across a pots telephone line in order to send dtmf tones ( no voice ) dtmf only. ...
Design of a kind of simple and practical telephone alarm system
At present, it is numerous to adopt the telephone line as long-range control and alarm system of the transmission medium, associated too mor...
Telephone Audio Interface Schematic
Audio from a telephone line can be obtained using a transformer and capacitor to isolate the line from external equipment. A non-polarized c...
Telephone line based audio muting and light on circuit
Telephone line based audio muting and light on circuit. Very often when enjoying music or watching TV at high audio level, we may not be abl...
Protection For Telephone Line Circuit
A long time ago when telephones were so simple almost nothing could go amiss from an electrical point of view, Telecom operators installed s...
Audio interface for Telephone line
Audio from a telephone line can be obtained using a transformer and capacitor to isolate the line from external equipment. A non-polarized c...