Design and implementation of digital controlled analog mixers for musical audio

The design of the digital control of a mixer is implemented throughout digital potentiometers controlled by an ESP32 FreeRTOS firmware, which is communicated via serial to an Android application. Also, an analog mixer is designed throughout multiple stages. Power supply: creating a standard by conve...

Full description

Autores:
Arévalo Álvarez, Juan Pablo
Tipo de recurso:
Trabajo de grado de pregrado
Fecha de publicación:
2019
Institución:
Universidad de los Andes
Repositorio:
Séneca: repositorio Uniandes
Idioma:
eng
OAI Identifier:
oai:repositorio.uniandes.edu.co:1992/45238
Acceso en línea:
http://hdl.handle.net/1992/45238
Palabra clave:
Amplificadores de potencia
Amplificadores de audio
Microcontroladores
Ingeniería
Rights
openAccess
License
https://repositorio.uniandes.edu.co/static/pdf/aceptacion_uso_es.pdf
Description
Summary:The design of the digital control of a mixer is implemented throughout digital potentiometers controlled by an ESP32 FreeRTOS firmware, which is communicated via serial to an Android application. Also, an analog mixer is designed throughout multiple stages. Power supply: creating a standard by converting a 120AC input to four DC outputs (15V, -15V, 5V and 3.3V) with an AC noise less than a 5% of each input. Inputs and preamplification, using instrumentation amplifiers with a 3.5mm - 1Vpp AC input, having a voltage line output preamplification of 1.23Vrms. Fader/mixer, with an adder connected to all the inputs and preamplification with a THD of 0.006%, a SINAD of 100dB and a FR without almost any amplitude voltage variations for the audible spectrum. Amplification of a power amplifier TDA2030 and output of a 20W-8{omega} speaker