For fun, I took a USB keyboard apart as I'd like to use the keyboard circuit board without the actual physical keyboard. I am in need of soldering advice however.
Opening up the keyboard I see this:
This is the plastic sheet that is connected to each keys. The pins I have zoomed into are connecting to the circuit board, which looks like this:
Unfortunately I can't solder directly to these as they appear to repel solder. I then tried drilling small holes in them and attaching thin wire, and maybe that can hold a while, but it seems very flimsy and is destined to break off.
Do you guys have advice on how to make a fairly robust connection to these pins?
Initially I'd like to connect separate wires and then connect the wires to my breadboard.
I thought about overlaying the plastic sheet on top (as it would have been inside the keyboard), but connecting wires to the plastic pins seems even harder.