Transmitter And Receiver Circuit Diagram. The receiver section consists of rf receiver ht12d decoder ic and four leds. The ht12e encoder ic vss pin is connected to the power supply ground and the vdd is connected to the power supply vcc.
The receiver circuit fig 2 is built around a single decade counter cd4017 ic4 and a few discrete components. One is the transmitter circuit and the other is the receiver circuit the transmitter circuit will be connected to the 3 5mm audio jack for audio input and the receiver circuit will be connect to a speaker to play the songs. The receiver section consists of rf receiver ht12d decoder ic and four leds.
Since the transmitter does not need a regulated 5v we have directly powered it with a 9v battery.
An extra led is connected to vt valid transmission pin of the decoder ic. So we are using 555 timer in astable mode to oscillate the ir at 38khz frequency. Below pictures showing the rf transmitter circuit with breadboard setup. Since the transmitter does not need a regulated 5v we have directly powered it with a 9v battery.
