A simple spectrum analyzer using dsPIC30F4011

Posted on March 16, 2011 by R-B One comment |

This project (posted on hobbydebraj) describes a simple spectrum analyzer based on a dsPIC30F4011 microcontroller. It uses Microchip’s FFT library codes to calculate the frequency spectrum of an input signal. The signal conditioning is achieved by a TL084 Op-amp IC. The peaks of spectrum are displayed on a graphics LCD.

dsPIC30F4011 based Spectrum Analyzer from Debraj

The microcontroller runs on its internal clock. An external programmable gain amplifier (MCP6S21) is used to provide adjustable gain to the input signal so that different amplitude input signals will have different gains before being sampled by ADC.