Remote control circuit consists of two parts, one is the transmitter and the other is the receiver. A simple schematic diagram of the remote control. IC transmitter transmitter circuit is controlled by NE555. Receiver circuit works by the frequency of the signal, which is emitted by the transmitter circuit. Transmission frequency of the signal must be equal to the decoder frequency receiver circuit. The frequency generated NE 555 is the same as the receive frequency of the IC LM 567.
Resistor R1 is a variable receiver to facilitate the adjustment process. The system works well when the circuit is ready. The first step is the optimization through the transmitter is turned on continuously, while the receiver R1 to set the value of being able to detect the signal from the transmitter. The second part is the receiver is controlled by LM 567. The following is a schematic drawing receptor.
In the image at the top of each channel is designed with a different frequency. Given the bandwidth of the frequency detection signal LM 567, between the frequencies on which they owe a big enough difference, let's try with a difference of 5 KHz.
