The circuit diagram of FM remote encoder/decoder has been published here. The main parts of this circuit are the ICs RF 600E and RF 600D. This circuit consists of two main parts such as transmitter (encoder) section and receiver (decoder) section. Among these, the transmitter stage uses IC1 (RF 600E) as its core part and the receiver stage uses IC2 (RF 600D) as its core part. These devices are designed to provide a high level of security and it can operate from DC supply between 2 to 6.6V DC.
In the encoder section, pins 1 to 4 forms the switch inputs of IC1. When each push button switch is pressed a corresponding code will be generated at the pin 6 which is the output pin. Transistor Q1 is used for buffering the encoded signals. After buffering, this signal is given to the FM transmitter module. In the decoder section based on IC2 has four digital data output pins (pins 17, 18, 1 and 2) corresponding to the switches S1 to S4 of the transmitter section. The receiver module receives the transmitted code and feds it to the data input (pin 9). After the signal processing in IC2 the transmitted signal will be obtained.
FM REMOTE ENCODER CIRCUIT
FM REMOTE DECODER CIRCUIT
- Assemble the circuit on a good quality PCB.
- The ICs can be operated from anything between 2V to 6.6V. It is better to use batteries for powering this circuit.
- Use miniature push button switches for S1 to S5.
- Various electronic circuits like remote control systems, remote alarm systems, anti theft alarms etc can be implemented using the RF600E/RF600D pair.