RF Transmitter with 2 Channels

The transmitter project provides 2 channels for transmitting and receiving which operates on the 418MHz frequency.

The circuit utilizes a few ordinary components to create the RF transmitter and RF receiver without having to tune-up any coil or variable capacitor. The transmitter consumes less that 1mA during standby while the power supply required is only 3V. The distance range is 10-15m even if the size is small. The device recognition requires 2 initial bytes with 2400bps communication. For the receiver, the communication length is 4 bytes or 32 bits. It also communicates at 2400bps with hardware UART.

An AT90S2323 microcontroller is used for the transmitter along with the TLP434 RF transmitter module at 418MHz. the transmitter can work with all 2323 chips but the AT90LS2323 is preferred since its working voltage is 2.7V-6V while the AT90S2323 has working voltage of 4V-6V and can work with 3V lithium battery.

The RF module RLP434A at 418MHz comprises the receiver including the AT90S2313 and the 2 relays that can handle any electric device up to 10A. This RLP434A is an RF module with ASK modulation and it has 2 outputs consisting of the digital and the analog output.

Rest of the project