Sound – Audio Projects

Arduino IoT Cloud ESP32 Alexa Voice Control Smart Home IoT 2021

Arduino IoT Cloud ESP32 Alexa Voice Control Smart Home | IoT 2021

In this IoT project, I have shown how to make an IoT-based Home Automation with Arduino IoT Cloud & Alexa using ESP32 to control 4 home appliances with voice commands. If the internet is not available, then you can control the home appliances manually with switches and IR remote. During the article, I have shown

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Measuring Refrigerant Gases Sound Speed Using Arduino and App Inventor 2

Measuring Refrigerant Gases Sound Speed Using Arduino and App Inventor 2

The purpose of this Instructable is to build a portable device that can measure the speed of sound in refrigerant gases and use this data to identify them. The speed of sound in an ideal gas is related to two characteristics of the gaseous substance, its molecular mass (kg/mol) and its adiabatic constant (heat capacity ratio), or

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Making the Grid

Creative Noise Semaphore

This project was submitted to ‘Creative Electronics’, a Beng Electronics Engineering module at University of Málaga, School of Telecommunications (https://www.uma.es/etsi-de-telecomunicacion/). It’s a modification based on sound level meters that are already marketed for use in classes to measure ambient noise. The project is developed in Arduino. It consists of a LED screen in which emoji

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Arduino Sketch Music Sequence Demo

Arduino Sketch Music Sequence Demo

This sketch is used by Exercise: Music Sequencer. Full Source Code The full code is all in one file MusicSequenceDemo.ino. // MusicSequenceDemo.ino : demonstrate generation of two simultaneous tones at different rates and patterns // The example program generates audio-frequency square waves at different // pitches and patterns on pins 4 and 5 to demonstrate an event-loop

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Arduino Audio Sound Level Meter

Arduino Audio Sound Level Meter

This is add-on of the audio amplifier project result which is introduced in other instructable. (https://www.instructables.com/PC-Speaker-Amplifier/) Usually many types of sound level meters are directly connected with input (or rarely output) signal lines of amplifier. But personally I’m thinking any electrical connections with amplifier circuit may surely degrade music playback quality by inserting some noises

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