4 Channel RF remote built using PT2262 and PT2272-M4 IC. PT2262 used as Encoder (Transmitter) and PT2272-M4 Decoder (Receiver) ICs are the heart of the project. The receiver provides 4 channel Momentary outputs. All outputs are TTL level and can be interfaced with other circuits or relay boards. The transmitter works with 5V to 12V DC. The receiver works with 5V DC.
When any of the SW13-SW16 (S1-S4) tact switches is pressed, power is applied to the encoder IC and RF transmitter module, the encoder then starts scanning Jumper J1-J8 and transmitting the status of the 8 bits address and data serially. The decoder IC receives the data and compares it two times with J1-J8 address jumpers and provides outputs also VT LED goes On, if the data is Valid and the address of the Transmitter and Receiver are the same. It is important to have the same jumper settings J1-J8 at the transmitter and receiver to pair both. Multiple remotes can be used to control devices at the same location by changing the address codes. All address is Tri-State and offers 6561 combinations.
Encoder – Transmitter (PT2262)
PT2262 is a remote control encoder paired with PT2272 utilizing CMOS technology. It encodes data and addresses pins into a serial-coded waveform suitable for RF modulation. The circuit uses 8 bits of tri-state address pins providing up to 6561 address codes, thereby, drastically reducing any code collision and unauthorized code scanning possibilities.
Decoder Receiver (PT2272-M4)
PT2272 decodes the waveform received and fed into the DIN pin. The waveform is decoded into code word that contains the address, data, and sync bits. The decoded address bits are compared with the address set at the address input pins. If both addresses match for 2 consecutive code words, PT2272 drives the data output pins whose corresponding data bits the decoded to be a 1-bit, and (2) the VT output — to a high state.
VT (Valid Transmission)
When PT2272 receives a transmission code word, it initially checks whether this is a valid transmission. For transmission to be valid, (1) it must be a complete code word, and (2) the address bits must match the address set at the address pins. After two consecutive valid transmissions, PT2272 (1) drives the data pins according to the data bits received, and (2) raises VT to a high state.
Features
- Wide Range of Operation Voltage 5V to 12V Transmitter (work on battery 12V 23A but the battery isn’t included)
- Supply 5V DC Receiver
- On Board Data Transmission LED
- 4 Momentary Outputs
- 4 Outputs TTL Level
- Address setting 3 states HIGH, LOW, And FLOATING)
- On Board Power and Valid Transmission LEDS Receiver
- RF link work on 433 MHz Frequency
- CMOS Technology
- Low Power Consumption
- PCB Dimensions Transmitter 48mm x 38mm x 30mm
- PCB Dimensions Receiver 48mm x 30mm x 12mm
Applications:
- Car Security System
- Garage Door Controller
- Remote Control Fan
- Home Security
- Automation System
- Remote Toys
- Robots
- Remote Control for Industrial Use
