/diy/ - Do It Yourself

Project for today:
I found a mechanical keyboard cheap at a thrift store the other day, BUT it was wireless, and not bluetooth, and the dongle was missing. Fuck wireless that isn't bluetooth or logitech's star system. But in addition to a bunch of nice key mechs (off-brand browns), it had a good pillow battery.
So I took the battery, its PCB connector, and a USB charger board (the kind that Big Clive shows as an example of the good kind), and a portable CD player and got to work.
I like having a CD player handy when "digging" for used CDs, but the fucking batteries always run out and shit. Being able to recharge with USB means I don't even have to go back in the house, I can just use a car charger. I've been wanting to this for a while. What I ended up doing was soldering wires to the two battery terminals of the CD player (they were copper coated or something, so ezpz), and cramming everything into the battery compartment and covering shit with tape.
And it works! It's happy with 4 volts, and I soldered to the AA battery terminals, so it's probably going to run a long time before it even needs to be recharged.
As for the keyboard, I'm just going to ohm out the matrix so I can hook up a plain USB interface or something. I can't see them, but I can tell it's got diodes in there. Or I can desolder all the key mechs for something else.