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How to wire four buttons and four LEDs:
View file name GPIO_4buttons_with_LED_Button4.pdf
(20 KB)
How to wire three buttons and three LEDs:
View file name LED_3Button3_.pdf
(10 KB)
An example of a low-voltage button that only requires 3.3v for its LED:
View file name PV4-gpio-low voltage buttons.pdf
(100 KB)