12V LED/switch - where to insert resistor to connect to PI GPIO - Raspberry Pi Stack Exchange
Amazon.com: DORHEA 2 Pcs Infrared LED Light Board Module for Raspberry Pi Camera Night Vision, 3W 850 IR High Power Night Vision Infrared Illuminator with Adjustable Resistor for Raspberry Pi Camera : Electronics
Raspberry Pi - Programming LEDs – YashTech Blog
Learn to Drive 8 LEDs on Raspberry Pi Pico Simulator - 2022 - Hackster.io
Blinking an LED on the Raspberry Pi – The Embedded Code
GPIO pin wiring for LEDs and their resistors - Raspberry Pi Stack Exchange
How to Set Up Buttons and Switches on the Raspberry Pi - Circuit Basics