How to modify Fairy lights - USB Powered, No more AA batteries (2023)

How to convert fairy lights or LED string lights to USB.
Its a great modification for any fairy led lights especially for Christmas.
This can be used with your power banks or any 5V output source.

[RileyGee]

My gf bought me a lil Christmas tree with some lights and my first thought was to hard wire them with a USB, originally I was just going to full send and skip a resistor as It didn't occur to me so your video saved me in the nick of time. I tore a broken VRC/DVD player apart and used a 80Ohm resistor thinking the impact wouldn't be too harsh, but no the lights are barely visible so at some point I'll definitely replace that resistor for a 20ohm.

[dranzacspartan]

Mate, I just get one long dowel rod, the thickness of a AA Battery (or a AAA Battery ... you can do the same).
Then I cut them up into the lengths of the AA Battery.
If you have a 3 port ornament to power up with USB, then you put in metal screws at each end of TWO dowel cutouts and screw in one piece of cable to each end.
On the THIRD dowel cutout, you add the USB cable. The USB cable needs to be stripped back a few centimetres ... cut out the Green and White cable, then screw the Red and Black cable into your third Dowel at either end.
That's it. You're done. Just place them into your ornament and ... presto ... it all lights up.

[jimmysegovia]

Thanks man for sharing your a Genius!!!!...

[irsyaadfauzi]

how many ohm resistors do I need, to power the 10 wire LED. previously used 3pcs LR44 batteries

[guyanesepublicenemy]

OMG WAS THINKING TO DO THIS AND STUMBLE ON YOUR VIDEO.
WAS THINKING THERE IS A WAY RATHER THAT BUY BATTERY ALL THE TIME

[Jeroen_a]

@1:02 Tip: Tie a knot in the USB cable for some strain relief.

[shiblshanawaz.a]

Hey man, But how would you convert an ac plug to some battery powered ones?

[janebowcock]

Great instructions is there a way to combine a number of lights to reduce the number you have to switch on seperately please?

[haticemosaics]

What about 3 battery fairy lights box?

[jessicastolz]

Awesome - how about to also add add a wifi modul to control via phone?

[pao]

What is the value of resistor? I need in wattage

[DavidVayhinger]

Could you post a link to the exact resistor that you used? I'm not sure where to get one, thanks

[czardaster]

Hey dude, can you do a Christmas light next? 😆 i mean can you convert AC plug to USB? (if that’s possible)

[LukeMTB]

Do you need to keep the battery case? Why not just cut the cord and connect the wires directly (with resistor)? Are you keeping the battery case around just for the on/off switch?

[bilgeyunak]

Can i just plug this to the wall instead of a powerbank?

[chowjoa]

Hi, can you do a Zealot s32 5 watts speaker upgrade?

[DaveBjornRapp]

Have you done this with a string that uses 1.5V?

[HellsingGhrey-htwg]

I did something similar with a wall led light. I just cut the cords completely though, so in order to turn it off, I need to unplug it, which isn't really a problem. How though, do I dimm it and control the brightness???

[MuhammadDarrell]

Can I plug the wired USB CORD to a USB to AC adapter and plug it in yo any 12v outlet?

[foxcrew]

how to test without soldering first...n test if my cable work....can i just put the wire +/ to the light +/-?