Raspberry Pi 4: The Ultimate Step-by-Step Guide to Using Raspbian to Create Incredible Projects and Expand Your Programming Skills with the Latest Version of Raspberry Pi by Liam Clark

Author:Liam Clark [Clark, Liam]
Language: eng
Format: azw3, epub
Published: 2021-02-16T16:00:00+00:00

Limiting Resistor

As shown in the connection diagram, the led is connected to the Raspberry Pi via a 220 Omh resistor. This resistor is called limiting resistor and has the task of limiting the electric current flowing through the pins of the Raspberry Pi and through the led. The limiting resistor is used to prevent the led from "burning out" and most importantly, to avoid possible damage to the Raspberry Pi circuits connected to the GPIO pin. In fact, the Raspberry Pi can supply a maximum of 16mA per GPIO up to a total maximum of 78mA.

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