The most interesting part is to hack a keyboard. For this purpose, I bought a brand new keyboard USB keyboard, because I thought for the electronic equipment, it's always the newer the better. But I was wrong, after I disassembled the keyboard, I found the circuit board was so tiny, therefore the connectors was so tiny, I think it was the tiniest in the class. It was so difficult for me to solder the wires onto the board, I spent about 3 hours in the Electronic Lab, and just soldered 5 pieces of wires onto the circuit board. Fortunately, I found there were very very tiny holes beside every holes. In intend to find wires can fit the holes, I ripped a old USB wire, and found the wire can fit the hole. That was much easier then soldering. To separate the wires, I wrapped them with some tapes and number. Then I tested it on my computer, and it worked so well.
For tomorrow, I need to put them into a box, and add some switches, to make a controller.
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