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Components are parts of a larger whole. In this chapter, we explain the different components we use in our tutorial.
This is an illustration of the Raspberry Pi 3. The GPIO pins are the small red squares in two rows on the right side of the Raspberry Pi, on the actual Raspberry Pi they are small metal pins.
Formula
Input pins are like switches that you can turn on or off from the outside world (like a on/off light switch).
Output pins are like switches that the Raspberry Pi can turn on or off (like turning on/off a LED light).The Raspberry Pi 3 has 26 GPIO pins, the rest of the pins are power, ground or "other". The pin placements correspond with the table below. Raspberry Pi B+, 2, 3 & Zero 3V3
5V
5V
10
11 12
13 14
15 16
3V3 17 18
19 20
21 22
23 24
25 26