Diy Audio Memes Button (arduino + Dfminimp3)

About the project

A button that plays mp3 files uploaded to a micro SD card. The project is based on the Arduino board and the DFminiMP3 audio module

Project info

Difficulty: Easy

Platforms: Arduino

Estimated time: 2 hours

License: GNU General Public License, version 3 or later (GPL3+)

Items used in this project

Hardware components

	220 ohm Resistor 1/4 Watt	x 2
	100 ohm Resistor 1/4 Watt	x 1
	Arduino Pro Mini 328 - 3.3V/8 MHz	x 1
	DFminiMP3	x 1
	Lithium Ion Battery - 18650 Cell (2600mAh)	x 1
	18650 2x-case	x 1
	Button with a lock The button to turn on the audio	x 1
	Toggle switch To turn on/off the device	x 1
	TP4056	x 1
	Adressable LED strip	x 1
	Speaker - 0.5W (8 Ohm)	x 1

View all

Software apps and online services

	Arduino IDE
	Python If there are a lot of mp3 files, a script will be useful to rename them and get an array with file lengths

Hand tools and fabrication machines

	Soldering iron	x 1
	Wire cutters	x 1
	Arduino Programmer, if you want to use Arduino Pro Mini 3.3V. I used USB TTL (UART)	x 1

Story

Initially, I was asked to assemble two such buttons for an event. I was given a clear TK - they were supposed to glow yellow and produce a ringing sound. The project is simple, so I coped with it quickly enough. And while testing the firmware, friends suggested uploading some kind of joke there instead of a beep. We uploaded music, memes, and so on to the button, recorded it on video, and dropped it into chats. Everyone liked it very much, someone started asking to assemble such a button to order. After completing the project, I ordered more lamps in the form of a keyboard key and improved the firmware - instead of one color and one audio file, the button glows in a random color and plays many audio files in a random sequence