The purpose of the project is to monitor the temperature of three compost heaps. It will send the data wirelessly to the receiver and process or display the result to PC. In the transmitter board, the project uses the TXM-433 as RF transmitter and MCU AVR AT90S4433 (you can replace it with AVR ATMEGA8) [...]
If you want to boost the output power of your low power FM broadcast band exciters then you can try this project, 40W broadband VHF RF Power Amplifier. The amplifier design is based on the recently introduced (1998) Motorola MRF171A MOSFET. The initial feasibility was performed using a linear RF and microwave simulation package, [...]
If you need need small and frequency stable FM transmitter for your application then you can try XFM1 transmitter. The XFM1 transmitter is 147.460 MHz crystal controlled tone modulated FM transmitter. The transmitter is tone modulated by a microcontroller PIC 12F675 approximately every two seconds. A Morse code call sign ID is transmitted approximately [...]
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