One of the great things about the Raspberry Pi is how everyone starts with the same piece of gear. Since the audio hardware is identical on every unit, it is trivial to load the drivers and play mp3 files.
This guide describes how to connect input buttons and play audio files using a Raspberry Pi running Raspbian. We make use of Adafruit’s Pi Cobbler and the Python module RPi.GPIO.
If you have not already used the Raspberry Pi as a input device this guide will show you how to wire the pull-down resistors, GPIO pins, and buttons.
Teaching the Raspberry Pi how to read analog inputs is easier than you think! The Pi does not include a hardware analog-to-digital converter, but an external ADC (such as the MCP3008) can be used, along with some bit banged SPI code in Python to read external analog devices.
Here is a short list of some analog inputs that could be used with this setup:
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
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