rajaram04
Advanced Member level 3
Hello sir,
I want to make a very very simple n cheap intercom system from the scrap of two telephones.i want a circuit diagram for the amplifier in which the mouth piece (mic) & ear piece (speaker) of handset can be connected directly so as to work as a complete audio system.Rest of the design & other connections i ll make of my own by applying suitable ideas but i want the amplifier simply so as to get the sound on the speaker from the mic or mouth piece . if it needs a simple pre amp then tell about it cause i will connect a simple amp using 820 ic circuit but if it requires some special one then i ve to go for it so please tell me details of the circuit diagram of that single amplifier.
Thanks
I want to make a very very simple n cheap intercom system from the scrap of two telephones.i want a circuit diagram for the amplifier in which the mouth piece (mic) & ear piece (speaker) of handset can be connected directly so as to work as a complete audio system.Rest of the design & other connections i ll make of my own by applying suitable ideas but i want the amplifier simply so as to get the sound on the speaker from the mic or mouth piece . if it needs a simple pre amp then tell about it cause i will connect a simple amp using 820 ic circuit but if it requires some special one then i ve to go for it so please tell me details of the circuit diagram of that single amplifier.
Thanks