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I did one with a detachable cable. I ordered these from Amazon. I cut the USB cable at the point where it comes out of the keeb and exposed the wires inside. If you look at that weird 5 pin guy on the keyboard that the USB cable attaches to you should be able to figure out which wires get soldered to where on the product I linked. These wires are very thin so you have to be careful when stripping and make sure they dont just break from metal fatigue after they're soldered. I attached that thing to the tiny piece of the board that unscrews and just used a bunch of hot glue to protect it all (including keeping the wires from moving and snapping). Use a dremel to make the hole big enough for cables to plug in.
I wanted to make my port upside down from the way this would produce so I made a tiny acrylic H looking thing that would let me mount it upside down but that's not necessary. Sorry I don't have pictures for you, its probably hard to understand with just text.
sounds like it would work.
cutting the usb cable to get access to the power wires seems a little sketch and unnecessary, you can grab the ~5v power from the node mcu's vin pin. ive powered led strip projects like that before. or you could get a micro usb breakout board so that you have clean access to the usb's power rails. the ppl over at r/FastLED would be able to help you out as well if you have any more questions about using the leds.
I keep having to by new ones for my son because he pulls it from the cable instead of the plug. The solder is poor quality and so is the soldering. I'm not talking just one brand, all the generics (that I have purchased) are like this. I didn't bother looking at the original since it was old and the first one to go. The part that holds the cable to the plastic housing is not constructed/designed very well.
I found this: Vita Adapter so I am going to make one, I found a bunch of the microUSB boards on Amazon. Since I have enough microUSB cables to go around the planet of Jupiter about 2.5 times and six broken cables, this should work out alright. If it does then I will probably make some sort of tether to one of the loops on the Vita so they wont get lost so easily.
If you get the cheap ones just get a couple extra just in case. Good luck!
What kind of battery are you planning on using? If its a simple rechargeable AAA, I used a female mico usb port from amazon.
Here's the one I made. I just used prebuilt micro USB female jacks that's on PCB's with header holes from Amazon.
I chose micro USB because of the 5th pin on the header board... and because I had some from my other projects...