Digitalno upravljani sustav za odabir audio ulaza i izlaza u tonskoj režiji

master's thesis

• Title (english): Digitally controlled system for selecting audio inputs and outputs in control rooms
• Author: Vedran Olujić
• Mentor: Kristian Jambrošić (mentor)
• Committee member: Kristian Jambrošić (predsjednik povjerenstva)
• Committee member: Ivan Đurek (član povjerenstva)
• Committee member: Miljenko Krhen (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2017-07-10, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

Zadatak diplomskog rada je konstrukcija i razvoj digitalno upravljanog sustava pomoću kojeg se biraju audio ulazi i izlazi u tonskim režijama korištenim za studijska snimanja zvuka. Ulaznim sklopom za prespajanje signala izvedenim signalnim relejima vrši se odabir aktivnih signala od nekoliko mogućih ulaznih audio signala.
Odabranim signalima se zatim prilagođava razina pomoću programibilnih pojačala Texas Instruments PGA2311. Nakon prilagodbe razine signali se sumirajućim pojačalima sumiraju sa signalom prethodno pojačanog ulaza za mikrofon te šalju na izlazni sklop za odabir audio izlaza. Osim posebnog ulaza za mikrofon, također je dodan i ulaz za slušalice s odgovarajućim pojačalom.
Cjelokupni sustav digitalno je upravljan tipkalima, inkrementalnim enkoderima, te bežično pomoću Bluetooth komunikacije. Digitalno upravljanje vrši Arduino Mega 2560 razvojna pločica s mikrokontrolerom Atmel 2560. Za prikaz trenutnog stanja sustava korišteni su LCD modul te LED indikatori.

Abstract (english)

Assignment of this Master’s thesis was to construct and develop a digitally controlled system which would be used to select audio inputs and outputs in control rooms for sound recording in recording studios. The input selection circuit enables selection of one of several possible input audio signals with use of signal relays.
Level of the selected signals is then regulated by Texas Instruments PGA2311 programmable gain amplifiers. After regulation, the selected signals are then sent to summing amplifiers where they are summed with a previously amplified microphone signal and sent to the audio output selection circuit. In addition to a dedicated microphone input, an amplified input for headphones is also implemented.
The system is controlled digitally via pushbuttons, incremental encoders, and wirelessly with Bluetooth communication. Digital control is done with the use of Arduino Mega development board equipped with an Atmel 2560 microcontroller. The current state of the system is displayed by LED indicators and a LCD module.

• Keywords: monitor kontroler; programibilno pojačalo; signalni relej; sumirajuće pojačalo; mikrofonsko pretpojačalo; pojačalo za slušalice
• Keywords (english): monitor controller; programmable gain amplifier; signal relay; summing amplifier; microphone preamplifier; headphones amplifier
• Language: croatian
• URN:NBN: urn:nbn:hr:168:084481
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-03-13 23:29:33