i am making a IR transmitter receiver for audio signal, for home use
in the transmitter part i removed the transformer and the voltage divider circuit and made the rest as such.. it works giving me 240mA for the IR LEDs from 12 volts regulated supply
in the receiver part, i used a BD139 instead of BEL187, and BC548 instead of BC549. the rest of the circuit is as such..
both the circuits work.. i tested them.. but the problem is the the range is no more than 6 cm.. and i getting a very low volume of sound at the receiving end...
whats wrong with it.. how can i increase the range as well as the amplification of the received signal?
in the transmitter part i removed the transformer and the voltage divider circuit and made the rest as such.. it works giving me 240mA for the IR LEDs from 12 volts regulated supply
in the receiver part, i used a BD139 instead of BEL187, and BC548 instead of BC549. the rest of the circuit is as such..
both the circuits work.. i tested them.. but the problem is the the range is no more than 6 cm.. and i getting a very low volume of sound at the receiving end...
whats wrong with it.. how can i increase the range as well as the amplification of the received signal?