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Step 31Connect switch leads to pins 7 and 8.
We will eventually connect these wire to pins 7 and 8 of the chip. 8 is ground, remember? When the button is pressed, pin 7 will be pulled to ground. When it is not pressed, it will be pulled up to Vdd by this particular chip's internal pullup resistor. If it didn't have an internal pullup, I would have had to add a 10k resistor to pin 7 and affixed the other end of the resistor to Vdd.
BUT, let's start putting the controller back together first, so we don't end up stressing these wires too much.
BUT, let's start putting the controller back together first, so we don't end up stressing these wires too much.
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