We developed an audio spectrum analyzer as our final project for ECE 4760. This analyzer presented a histogram-style representation of audio signals. We successfully achieved real-time display of the audio signal’s frequency spectrum using a monochromatic histogram layout, where bins extended from left to right, representing low to high frequency ranges. Our system was built […]
Audio Spectrum Analyzer Read More »
This project is a miniature Audio CRO. For those not familiar with the abbreviation “CRO,” it means “Cathode Ray Oscilloscope” and this is sometimes shortened to “SCOPE or O-Scope.” A “CRO” is a piece of test equipment with a screen. It produces a visual indication of a waveform, via a probe, when the waveform is
Audio CRO using PIC12F675 Microcontroller Read More »
Short Introduction: I have been following the Battle of the DreamBoards Championship with interest and I enjoyed the variation of functionality features put together in each of the dreamboards. I especially had my attention attracted by the combination of audio inputs and outputs, analog to digital and digital to analog converters, and the microcontroller digital
Build a musical EKG with the Freescale FRDM-KL05 Read More »
The EchoMp3 is a small DIY* MP3 player. It’s cheap and of excellent quality. 64, 128, 256, 512MB and 1, 2, 4 GB MMC and SD(HC) cards used as storage. FAT (FAT16) and FAT32 supported. Low power operation with a single AAA (HR03) 1V2 Ni-Mh battery. Runs on a 18LF452 or 18LF458 at 20 MhZ.
Echo MP3 player using PIC18LF452 Read More »
Hello everyone, The important aspect of every learning is to induce curiosity and doing something meaningful to satisfy that.With the help of that curiosity, I’m here making a volume adjuster program which resembles the same in most devices but not that much, Here the default volume will be 10.Maximum volume will be 20 as well
PIC MicroController Volume Adjuster Program(Proteus 8 Stimulation) Read More »
Recently a cell phone ring tone was in the news – it’s 17,000 Hertz and meant to be heard by teenagers, but inaudible to adults. Really got some people upset for some reason. It got me wondering – what frequencies can I hear? I made the shrieker. It can generate tones from 10,000 Hz to
Shrieker using PIC16F676 Microcontroller Read More »
Due to its simplicity (requires minimum external components) and high availability, LM386 is very popular among hobbyists for use in low-voltage audio amplification applications. Most of the time a potentiometer is used at the input side of LM386 to provide a volume control in the output speaker. The potentiometer does not control the gain of the
LM386 based stereo audio amplifier with digital volume control using PIC18F2550 Read More »
The Project aims at controlling a wheelchair for handicaps by means of human voice. The speech recognition system is a useful way of implementation and is easy to use programmable speech recognition circuit. Programmable, in the sense that user can train the words (or vocal utterances) he needs the circuit to recognize. This board allows
Voice controlled wheelchair Read More »
It is based on the PIC 16LF877, with plenty of processor time to spare. There is a bare bones assembly version, and a new C version with more features and stability. It uses compact flash cards up to over 100 gigabytes (once they exist) including microdrives. (right now they are about 8 gig) It uses
The Super-Simple pocket size mp3 player using PIC16LF877A Read More »
Introduction This project implements a real-time audio spectrum analyser using a PIC18F4550 8-bit microcontroller. The spectrum frequency analysis is performed by a highly optimised 16-bit Fast Fourier Transformation (FFT) routine coded entirely in C. The output from the FFT is displayed using a 128×64 graphical LCD to allow a real-time view of an audio signal.
Audio spectrum analyzer using PIC18F4550 Read More »
