Adafruit Holiday Shipping Deadlines 2018: Attention! Please place all UPS Next Day orders by Monday 12/17/2018 11 AM EST
0

Portable Bluetooth Boomcase

NewImage

Converting a vintage suitcase into a groovy Bluetooth Boomcase. via instructables

The Boomcase is a vintage suitcase converted into a boomcase,
It has two woofers and two tweeters. The case is powered by one lead acid battery.
The boomcase can be charged via an 230V power supply. The amplifier delivers 15 watts of power per channel, and has a connector for an external sub-woofer (30W). You can easily take this case to the park or to the beach or just let it play at your home. This is my first instructable so I hope you like it.

Parts List:

– Suitcase: found in my garage.

– Speakers: found in a local second hand store.

– Buck convertor: http://www.aliexpress.com/snapshot/6451422603.htm…

– Switched mode power supply: http://www.conrad.be/ce/nl/product/511827/TDK-Lamb…

– Bluetooth module: http://www.benl.ebay.be/itm/Bluetooth-BLK-MD-SPK-B…

– Usual electronic components (resistors / capacitors / connectors / …): found at a local electronics store.

– Lead acid battery: bought at local flea market.

– Lead acid batterycharger: found at a local electronics store.

– Heatsink: recovered from old Acoustimass speaker.

– PCB: http://www.elecrow.com/services-c-73.html

Tools used:

– Soldering iron

– Tweezers (for the SMD components)

– Wire Cutters/Strippers

– Dremel

– Drill

– Milling machine

Step 1: Designing the PCB

NewImage

First I designed the PCB,

I did this step first because I know I will have to wait for at least 3 weeks for the PCB’s to arrive.

I started with a schematic that i found on the internet:

This scheme will never work on a 12V battery!
The voltage required on pin 7 (standby pin) of the TDA7377, is 5V in this configuration the voltage on the standby pin would be 1,9V and then the amplifier would never get out standby.
I replaced the resistor of 22K ohm with one of 10K ohm and the capacitor of 1µF with one of 10µF.

I altered it so I could make an extra sub-woofer channel:

I made it a mono speaker: joining the right and left channel together.

This joined signal I took as input for my sub-woofer pre-amp.

I designed the PCB with the Eagle cadsoft software but I lost the .BRD file so I can only upload the .SCH file. (truly sorry).

Full tutorial


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.

Join 9,200+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython – Python on Microcontrollers is here!

Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/


Maker Business — Japanese word working and more in December’s issue of HackSpace magazine!

Wearables — Solder-less magic

Electronics — = != ==.

Biohacking — Finding Bliss with Anandamide

Python for Microcontrollers — sysfs is dead! long live libgpiod! libgpiod for linux & Python running hardware @circuitpython @micropython @ThePSF #Python @Adafruit #Adafruit

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.