This is my first project on instructables.
I would like to show how to convert AC 2.1 speakers to 100% portable.
This is a simple project for all people included electronic lovers and DIY lovers.
Step 1: Getting the Parts and Tools
Parts that you need:
Mp3 or Mp4 music player
Battery - I use one lipo battery 3S 3700mAh
RCA connectors - For right and left channel
3.5 stereo jack
Step 2: Open the Subwoofer Main Box
Remove foam and speaker.
You can see now the main board.
Step 3: Remove Non Necessary Parts
1 - Disconnect the Ac wire from transformer to mainboard.
2 - Remove wires from switch.
3 - Remove the Ac plug.
3 - Remove transformer.
Step 4: Soldering DC Power Wires
Attention to polarity of capacitor!
Note: Negative terminal on capacitor has a (-) vertical markings.
1 - Solder positive wire to positive pad in capacitor.
2 - Solder negative wire to negative pad in capacitor.
Step 5: Connect Wires and Battery Connector
1 - Solder the positive wire from mainboard to switch
2 - Solder the another red wire from switch to battery connector.
3 - Solder the negative wire from mainboard to battery connector.
Step 6: Battery
1 - Put the battery inside the box.
2 - Leave the balance plug outside the box to charge in the future your battery.
Step 7: 3.5 Jack and Rca Connectors
1 - Solder the ground, right and left wires in the 3.5mm jack.
2 - Solder the right wire in the right rca connector.
3 - Solder the left wire in the left rca connector.
4 - Solder the ground wire between both Rca connectors.
Step 8: Mp4 Music Player
1 - Put some velcro in the box and in your music player.
2 - Connect the 3.5 jack
Step 9: Test
Thanks for watching!