I have just picked up a new AVR microcontroller, the AT90USB647 AVR. This one has a built in USB controller, very neat. Its much larger than the previous AVRs I have used (Atmega8, Atmega48, Attiny13). One of the reasons I purchased this microcontroller was because my AVR-ISP programmer is compatible with it and the other is that it has USB functionality.
For a while now, I have wanted to make use of my RF transmitter and receiver. As I have stated before, I am rather cheap at this time, and I purchased a basic transmitter and a basic receiver. They are seperate modules, the transceivers are a bit too fancy for me right now.
For a while now, I have wanted to make use of my RF transmitter and receiver. As I have stated before, I am rather cheap at this time, and I purchased a basic transmitter and a basic receiver. They are seperate modules, the transceivers are a bit too fancy for me right now.
As I put this circuit together, my goal was to implement a basic loopback system to test RF and USART functionality. The USART is handling the hardware protocol for RF transmission. The program I wrote sends data via the RF transmitter to the RF receiver and displays data received on Port A through 8 LEDs.
Everything in my circuit built and program being executed. The red wires sticking straight up are acting as my RF antennaes and surprisingly enough make quite a difference.
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