I made this boombox in sizes which fit in standart bicycle’s bottle holder. I have added spectrum on MSEQ7 which made years ago.
Boombox’s parts list:
MP3 module
https://ru.aliexpress.com/item/5V-Slim-Mini-Size-DIY-MP3-KIT-WAV-MP3-Player-Audio-Decoding-Decoder-Module-Board-With/32594145649.html?spm=a2g0s.9042311.0.0.iR0kOQ
Bluetooth module BK8000L
https://ru.aliexpress.com/item/Free-Shipping-Bluetooth-Stereo-Audio-Module-Transmission-BK8000L-AT-Commands-SPP-Bluetooth-Speaker-Amplifier-DIY/32713261134.html?spm=a2g0s.9042311.0.0.iR0kOQ
3W amplifier
https://ru.aliexpress.com/item/PAM8403-module-Super-mini-digital-amplifier-board-2-3W-Class-D-digital-amplifier-board-efficient-2/32273964965.html?spm=a2g0s.9042311.0.0.02gUlZ
3W 4 Ohm 40 mm speakers
https://ru.aliexpress.com/item/2PCS-Lot-High-Quality-Speaker-Horn-3W-4R-Diameter-4CM-Mini-Amplifier-Rubber-Gasket-Loudspeaker-Trumpet/32665186049.html?spm=a2g0s.9042311.0.0.02gUlZ
Step UP module
https://ru.aliexpress.com/item/MT3608-2A-Max-DC-DC-Step-Up-Power-Module-Booster-Power-Module-For-Arduino-3-5V/32717135070.html?spm=a2g0s.9042311.0.0.2woBG1
3-Way switch (got it from broken casette player)
18650 Li-Ion element + holder
Spectrum indicator (i made it as improvisation but you can buy it, i think this fit well https://ru.aliexpress.com/item/Ghxamp-LED-DIY-8-4/32843728542.html )
Charger plate
https://ru.aliexpress.com/item/5-pcs-Micro-USB-5V-1A-18650-TP4056-Lithium-Battery-Charger-Module-Charging-Board-With-Protection/32797834680.html?spm=a2g0s.9042311.0.0.2woBG1
Some M3 screws and glue
That tiny speakers not loud, but it still enough and it goes to hot in max volume. Some more power I got after increase voltage to amplifier by Step up module to 5.5 V. Mp3 module and bluetooth connected through switch to battery voltage.
On 2200 mah player works about 3-4 hours.
Print Settings
Printer:
FLSUN Delta printer
Rafts:
Doesn’t Matter
Supports:
Yes
Resolution:
0.2 mm
Infill:
30%
Notes:
Body printed on Delta printer FLSun via PETG. Bicolor cap made with changing filament in low speed printing.
Credits:
gamebox13
Download 3D models
| File | File size |
|---|---|
Bicycle_boombox
|
820 KB |