Convert a Genius Speaker to Run on 9 Volt Baterys

7/30/2019 Convert a Genius Speaker to Run on 9 Volt Baterys

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Convert a Genius speaker to run on 9 volt baterys.

Do you like the quality ofcomputer speakersand wish you could take them camping but never could

because they run on 250V. Or do you just have a pair of old speekers lying around and looking for

somthing to do with them. Then this instructable is for you!

In this instructable I will give you step by step instructions on converting a pair of genius speakers to

run off two 9V batterys.

For a couple of months I have ben working on trying to perfect a lm386 amp but gave up after I

contuied getting bad static quality. I picked up a pair of geinus speekers wich I liked the quality of.

And I then thought that they would never possiably need 240V to run so I opend them up and found

out that they had a 240V to 9V step down transfourmer so I set to work converting them to run off 9

volt batterys.
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Step 1: Parts & tools.
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TOOLS

Soldering Iron.

Tip cleaning sp onge.

Plyers.

Wire cutters.

Kni fe.

Screwdriver.

Wire str ipper(not showen in picture).

MATERIALS

Solder.

Soldering iron gas (i f you have a gas soldering iron).

2 X 9 vol t battery snaps.

2 X 9 volt b attery.

Genius speakers (SP-K06).

Step 2: Remove front plate.
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Using a lardge knife slide the knife in between the plastic andfabric. Gentley work your way aroundthe speeker box (olny the main one) levering off the front plate, take care not to stab the speaker.
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Step 3: Open up.
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Remove all screws, there is four of them two on the front and two on theback.
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Step 4: Working out how much current you need.
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I thought that somthing of the size of my speekers wouldn't need 240V torun, inside found a stepdown transfourmer stating that it provided 9V at0.3A. I did some research and found that most 9V batterys supply200/300ma meaning that I would need two batterys in paralell to make itrun if the batterys supplyed 200ma each.

Step 5: AC to DC?
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AC current stands for alternating current witch means that the powerchanges from positave to negitave and then back to positave and the otherwire being ground.

DC stands for direct current and means that one wire is always positaveand the other is always negitaive or grond

AC is not as usefull as DC but things like transfourmers cannot run off DCand it is easyer to convert AC to DC so mains power (the power that issupplyed fromwall plugs) supplys AC.

AC wich is a problem for us becausThe transfourmer supplys e batterysolny supply DC, and DC it is harder to convert into AC.Luckley the circuit that was in my speeker had four diodes aranged as abridge rectifyer. A bridge rectifyers purpose is to convert AC to DC witch iswhat our batterys supply. This means that what looks like our board draws
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Strip about 1cm of the ends of your battery connecters and twist all hepositaive and all the negitaive leads together (posative to positaive andnegitaive to negitaive).
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Step 7: Cut the wire!
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Cut the two wires that run out of the transfourmer and into the amp leavingenough wire from the board to strip and solder on to. Then strip about 1cmfrom the ends of the cables that run to the amp. Twist these cables onto the
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battery connectors. Polarity does not matter because of thee recifyer. Thensolder these cables together. Wrap all exposed wires in tapeand tapetothe side of the case too stop rattling.

I did not have any photos of soldering because my iron blocked up. I will beadding pics when I cansolderagain.

Step 8: Remove transfourmer and power cables.
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This step is optional. I planned on adding adpdt switchto toggle betweenbatterys and wall plug later so I left it in.

Un-screw the transfourmer from the casing then using a pair of plyerssqueeze the clip that holds thecablein and then pull out. Cut the powerplug off and pull the cable through. You can throw out the transfourmer,keep it for use in other things or convert the speekers back later.

Step 9: Finish! Add batteys, reassemble and test.
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Add the batterys and test. I wrapped the batterys in tape to stop themshorting on anything. Put the batterys inside the casingand tapedown tostop them bashing around and breaking anything. Re-assemble thespeekers the same way you pulled them apart.

Done. Thanks for reading my instructable. I will be uploading more soonishlike How To Make A Grass-Kart (go kart).
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Convert a Genius Speaker to Run on 9 Volt Baterys

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