The types of applications targeted, and therefore the hardware and software interfaces required, are what will distinguish the different platforms. We'll now take a look at the different types of application and what they imply in terms of hardware.
Here we present an elementary example for electronics training. It is taken from a Raspberry tutorial. The device comprises a Raspberry microcontroller and an electronics kit with an LED and a resistor (figure 3). The aim is to switch the LED on or off. The connection between the Raspberry and the kit uses the microcontroller's GPIO ports. A program is written to control the LED.
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You can easily identify them thanks to this pictogram: