You may know what an OR gate is. An OR gate is a logic gate that takes two inputs
and controls an output. You may have played with these types of gates, even
possibly a DIP packaged OR gate with 4 OR gates built into it. This DIP package
required a power pin and a ground pin. Electricity flowed through the IC and
allowed it to operate. You may not be sure how the IC was built, but you
understand that if you change the inputs, the output changes. You can do this by
tying the inputs to either power (also known as VCC) or ground (GND). You
probably played with one of the DIP ICs in a breadboard. If any of this is
completely alien to you, don't fret! We'll try to ease you into it.
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