Step 4Soldering the cables in the keyboard microcontroller
Before soldering the cables, use the dremel tool to remove the black material over the tracks in the circuit, this will help the solder to stick to the circuit.
I will solder cables for the "Ctrl", "Alt", "Right arrow", "Left arrow" and "Scroll Lock" because I'm using this circuit for another project in the near future. But U just need to solder the cables for the scroll lock keys.
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And just mentioning the other project, I had to go check that one out too! I started working on this and got frustrated trying to find the two pins to close the gap for the keys I needed. I didn't think of using a multimeter rather than trial and error with a keyboard button test. It was a cool program though. It'll highlight the keys you press on an on-screen keyboard so you know if they are working. I don't remember its name but a google search will find it along with multitudinous others and might come in handy for someone reading this.
Now that you've shown me a better way to isolate the keys I need, I'm going to make a similar switch.
TY
Good luck with you project, hope this instructable helps you. Let me know if you need something else.
¡Cheers!