RS232 Spectrum Analyser

This project came from the idea that I needed a simple, light spectrum analyzer which could be easily interfaced to embedded applications. This design was a proof of concept which made use of a RFM22B radio module and a PIC16F690. A simple GUI was also constructed for initial testing purposes. Photos of the prototype can be seen below. Source code for the proof of concept can be found downloaded here:

Visual C# Project

MPLab Project

Proof of Concept connected to Pic Kit 3 for power and a FTDI cable for UART communication

Proof of Concept connected to Pic Kit 3 for power and a FTDI cable for UART communication

Pic kit 2 Logic Analyzer tool output for a SPI command to the RFM22B

Pic kit 2 Logic Analyzer tool output for a SPI command to the RFM22B

The next post will contain some screen shots of the GUI in action.

The Telemetry…

DIY Robotics telemetry modules

DIY Robotics telemetry modules

For this project a constant data communication will be needed from the vehicle and its payload to a ground station. Therefore, a telemetry radio needs to be added. Fortunately the APM 1 kit  discussed earlier makes provision for a telemetry module. The telemetry modules I opted for was from 3DRobotics running at 433MHz 100mW. However due to ICASA regulations a the radio can only be used at 8mW maximum.