The project is based on the FireBeetle M0 homemade audio photo album, and stores the audio file directly in the SPI Flash of onboard integration via USB, and the MCU is analyzed and played.
step:
First, install Arduino IDE and Firebeetle M0 SDK, test the development environment (download the latest IED: https://www.Arduino.cc/en/main/software on the official website of Arduino
1. After installing Arduino IDE, open it, download and install Firebeetle M0 SDK.
2, click File -> Preferences
Click on the icon with the red circle 1 and then pop up the box of the URL.
Copy the following address to the box: http://download.dfrobot.top/firebeetle/package_firebeetle_index.json
Click OK to save.
Click OK to save the settings in the Preferences interface.
3, click Tool -> Board -> Board manager
4, then we can see the SDK of the Firebeetle SAMD board, click Install.
5, then, you can see the Firebeetle M0 board in the Board interface, select it.
6. Connect the FireBeetle M0 board to the PC using the USB cable, and then the operating system can find a new COM.
7. In order to test whether the development board can work properly, run a simple P13 LED scintillation program.
8. Click the arrow buttons in the upper right corner, the LED scintillation program will be compiled and burn into the motherboard. During burn and writing, the LEDs on the motherboard P13 flash quickly. When the upload has been uploaded in the lower right corner of the ID, it indicates that the program download has been completed.
If the green LED on the Firebeetle M0 P13 flashes in a second and the rhythm is flashing in a second, it is clear that the board is working properly and we have established a development environment.
Second, welding
Hardware components:
AAA battery holder with cover and power switch
FIT0192 36mm8Ω speaker
DFROBOT DFR0119 3W Mini Audio Stereo Amplifier
DFROBOT DFR0039 LILYPAD button module
DFROBOT DFR0652 Firebeetle Board-M0 (V1.0)
A white ultra-fine PFA polytetrafluoroethylene high temperature wire 0.38mm outer diameter 1 16 inches
Welding audio power amplifiers, speakers, and five buttons. The wire used to connect the button should be about 15 cm.
Connection Diagram:
Third, prepare photos and record audio
1. Prepare photos and stories they want to say. Use the mobile phone to record 5 story audio files (talk loudly to improve signal-to-noise ratio).
After completing, transfer these files to the PC.
2. These files are compressed dual channels that need to be converted to WAV mono files that can be decoded by software on the Firebeetle M0.
Use software Audacity to convert the M4A file to a mono WAV file, which is free open source.
Download address: https://www.audacityteam.org/
After installing Audacity, you need to download a free FFMPEG-WIN-2.2.2.EXE plugin: https://lame.buanzo.org/#lamewindl
.M4A file is converted to a WAV file:
Click "Edit" -.1882 in Audacity. "Preference".
Click the library -> Ffmpeg library -> Location, select FFMPEG installation path, and then click OK.
Click the Audacity software file. 1882. Open the 0.M4A file just recorded, click the drop-down button above the track, then select "Spoke to a mono a mono".
Click the silent button of the channel to set the project rate to 44100HZ
Click File -> Export -> Export to WAV, export the WAV file.
Select "No Symbol 8-bit PCM" in "Encod" and save the 0.WAV file.
3. Connect the FireBeetle M0 board to your computer via the USB cable. Double-click the RST button on the side. At this time, the RGB indicator on the motherboard is turned green, and the computer pops up the U disk. Copy 5 .WAV files to your U disk.
4. Click the RST button to enter the programming mode.
Fourth, download the code to the Firebeetle M0 board
1. Open Arduino IDE, click Sketch-> Include Library -> Add.zip librar Add the Audiozero.zip library.
2, click File -> Open in Arduino IDE, open Voice_album.ino, click the upload icon to upload the audio album code to the Firebeetle M0 board.
3. When you press the five buttons, you can play the corresponding songs, then the programming and circuit part are completed. Next, you only need to install the hardware circuit to our album.
5. Install the circuit to the album
1. There are three screws in the album. Remove the bottom screws to facilitate install the circuit.
2. Unscrew the screws on the last page of the album, use tweezers to make the button wire through the book.
3, connect the circuit, then recover the screws of the album.
4. Secure the battery box, the Firebeetle M0 board and the speaker on the album with double-sided tape.
5, put photos into the photo album.
Six, audio photo album actual effect
Our other product:
