Need help for home made speaker

[vascobrissos14]

Hello everyone,

I was thinking on making a home made speaker since I'm using my dad's JBL Flip for a long time alredy and it's not mine 😛

I got all the parts I need (I think) so I'm here to ask if the parts I chose are going to work or not.
The case is going to be hand made
I chose the speaker to be Bluetooth and Line In with a battery pack.
I was thinking in placing the 4 batterys in series (14.8v) and use that Step Down module to get 5V and connect my bluetooth drive and solder 2 more cables for the sound amplifier.
Thank you all for your help

LIST:

http://www.ebay.com/itm/USB-Bluetooth-Music-Audio-Stereo-Receiver-for-Car-AUX-IN-Home-Speaker-3-5mm-/141868434353?hash=item21080483b1:g:cogAAOxyNo9SynA3
http://www.ebay.com/itm/4x-3-7V-18650-GTL-Li-ion-5300mAh-Red-Rechargeable-Battery-for-LED-Torch-/121498553553?hash=item1c49e0ccd1:g:7swAAOSwaNBUdsdT
http://www.ebay.com/itm/DC-to-DC-Converter-Step-Down-Module-7V-9V-12V-24V-to-5V-Usb-Output-Power-Adapter-/131549251070?hash=item1ea0f245fe:g:ywUAAOSwPcVVll1Z
http://www.ebay.com/itm/Mini-Digital-Class-D-Stereo-Audio-Amplifier-Board-2-Channel-5W-5W-AMP-Board-2-8-/311511826382?hash=item48878d3fce:g:B2gAAOSw3KFWfRqE
http://www.ebay.com/itm/2pcs-2-inch-45mm-4Ohm-4-5W-Speaker-Loudspeaker-Strong-bass-/161833148763?hash=item25ae01e15b:g:TDYAAOSw9r1V~7-x

EDIT: Can anyone tell me what that "Speaker" hole on the amplifier does? I'm a bit confused with it. ty

 

[Kursun]

Ooops! I made a mistake...
For on/off switch spdt switch in your link is OK.

But for input selection you need a dpdt type of that switch. Seperate poles for Left and Right channels.
Similar to this one: http://www.ebay.com/itm/5X-DPDT-ON-ON-2-Position-Mini-Toggle-Switch-6-Pin-Momentary-Switches-6A-125V-AC-/331529903756?hash=item4d30b8de8c:g:RogAAOSweW5VLOJY

Similarly if you wish to use 3 position combined aux/off/bt switch the correct circuit diagram would be http://postimg.org/image/5uxiq8trf/
(seperate poles for L&R channels)

 

[vascobrissos14]

As you probably can see I will only use the switch for 1 pole, the other one is going to be always connected.
https://pbs.twimg.com/media/CbQ9WR0WwAEygbX.jpg

Doesn't it work? I've always seen that the audio cables have 2 wires only (2 poles)

No microphones are going to be added/needed so it's 2 wires only (I think)

 

[Kursun]

In your circuit diagram only two wires come from aux and bt. I assume one wire is live side and the other screen (earth).

Since you use two amplifier channels and have a pair of speakers you are constructing a stereo speaker system.
In a stereo setup there are either four conductors:
1. Live wire Left channel
2. Earth (screen)
3. Live wire Right channel
4. Earth (screen)
Or more commonly, as in your setup:
1. Live wire Left channel
2. Common Earth (screen)
3. Live wire Right channel

In your circuit diagram you have used a single pole double throw switch and paralled the amplifier channels (red lines).

Both aux and bt have 3 conductor terminals. You connect the earth (screen) directly to minus line. The other 2 lines, one left, other right channel live wires should go to the input selector with separate poles (dpdt). And the 2 center terminals should go to their corresponding left and right channel amplifiers.

Google "wiring 3.5mm stereo jack" and you'll see 3 wire wiring examples.

 

[vascobrissos14]

I talked to my dad and yes, you are right. I would be right if I was using mono on my speakers, which I'm not

I'll wait for all the parts to arrive and mount the speaker. I'll tell you when I make it. Thank you for all your help dude

 

[vascobrissos14]

Almost 1 month later and the speaker is almost ready. Just waiting for the step up and micro usb thing to finish the speaker! Finishing the box atm

 

[Kursun]

Almost 1 month later and the speaker is almost ready. Just waiting for the step up and micro usb thing to finish the speaker! Finishing the box atm

Congratulations!

 

[vascobrissos14]

Almost 1 month later and the speaker is almost ready. Just waiting for the step up and micro usb thing to finish the speaker! Finishing the box atm

Congratulations!

Thank you! The speaker is done! I did it with my dad and it turned out a really good speaker! My mom loved it so much she even asked me to buy parts to make another 1 xD! Here I go in more work hahaaa