09-06-2012, 07:01 PM
i need the ppt of telephone line based audio muting light on circuit
09-06-2012, 07:01 PM
i need the ppt of telephone line based audio muting light on circuit
03-10-2012, 03:15 PM
TELEPHONE LINE BASED AUDIO MUTING AND LIGHT ON CIRCUIT
TELEPHONE LINE.docx (Size: 944.77 KB / Downloads: 47) INTRODUCTION The circuit to based of telephone line system used Audio system of muting level. The audio speaker system of controlled relay contacts. The telephone when ring arrival of light ON level used optocopler and Timer IC’s. Power unit of applied the opt coupler when transferred the electric signals of formed audio system and on light ON circuit Mainly use of this project is connect to any of your home appliances GENERAL DESCRIPTION Now a day’s most of people, sometimes very often when enjoying music or watching TV at audio level. We may not be able to hear a telephone ring and thus miss important incoming phone call. To overcome this situation, the circuit presented here can be used. On arrival of a telephone ring and simultaneously mute the music system /TV audio for the duration the telephone handset is off-hook. Telephone when ringing of automatically light arrival of level. The Relay contacts of used for music system, television, and light connected into the timing period of incoming call as well as light during off-hook period. WORKING The circuit provides the DC voltage in 12 v of power supply to connected in wires Telephone line cables of connected individually in R1 Resistor in Diode of connected parallel into opt coupler IC’s. These IC’s of 5 pin is connected in 1k Resistor to be applied power unit the output 4 pin is connected to serially in D2 diode and c1 capacitor with in ground potential. In between R3 Resistor and D2 diode and c1 capacitor connected IC2 of provides 12V supply into 8 and 4 pin is connected. R4 and R5 resister of connect 6,7 pin’s. In between 7th pin’s R5 resister and C2 capacitor connected. By switching Transistor the signals of voltage amplified the signals of voltage applied the Trigger point of IC-555 The output of 3 pin IC-55 is contacts’ the relay to time period of 0.5 minutes. Relay RL1 is applied of lamp indication connected 230V AC power supply unit. CONCLUSION: Thus the Telephone line based audio muting and light –ON circuit play a very important role in controlling the home applianceThese will be helpful to the persons who forget to mute level of speaker systems. |
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