Select Audio Inputs With a Raspberry Pi and Relays
Have trouble remembering the name of a stereo input that goes with an audio component? (For example, "Tape 1" is a CD Player and "Tape 2" is a cassette deck and "Aux" is an 8 track and so on...). A better solution is this Raspberry Pi project: a touch screen audio input selector! This project requires some basic hardware and software skills, mixing them into a fun starter project with a real world application. As you may know most line level audio signals (the red and white RCA jacks on the back of equipment) have 2 connections: left and right channels, aka stereo. So the 16-channel relay board allows the Raspberry Pi to switch up to 8 audio components! The coding part of this project is ReactJS (handles the UI) and Python (Web service that activates the appropriate relay). The result is I can select an audio source by clicking its image on a phone or tablet. The applications for this project go way beyond audio: with the Python "relay service" built here, we could have the relays control almost anything. We hope you enjoy this fun project. Also, if you are interested in learning more about any of the cassette decks pictured in this video, they are available in individual videos on our YouTube channel. Thanks.
00:00 - Intro
00:47 - Project Description
01:12 - Configuring the Relay Board
04:12 - Connecting the Inputs
04:50 - Building the User Interface
05:44 - Phone vs Touchscreen case
06:15 - Conclusion
Here is a playlist with Cassette deck repair and demonstration videos:
• Cassette Decks