Low side vs. High side transistor switch - Bald Engineer
3V LED Dimmer Circuit with BC547 Transistor - CircuitBest
voltage - Driving a high power (200mA) LED with a GPIO and NPN transistor - Electrical Engineering Stack Exchange
Lab: Using a Transistor to Control High Current Loads with an Arduino – ITP Physical Computing
Use transistors for controlling two LEDs - Electrical Engineering Stack Exchange
Driving LEDs on higher voltage | LEDnique
Simple constant current LED driver | Bryan Duxbury's Blog
Transistor as a Switch - Using Transistor Switching
Working of Transistor as a Switch - NPN and PNP Transistors
How to Build a Simple LED Driver Circuit
Electrical Engineering - Driving LED with NPN transistor from I/O pin
How to Use an NPN Transistor to Switch on an LED - Electronics for Absolute Beginners - YouTube
How to Use a Transistor as a Switch | Nuts & Volts Magazine
RGB LEDs - DIYODE Magazine
Using NPN transistor for either load control (LEDs) or digital signal (WS2812) - General Electronics - Arduino Forum
Using a transistor to control a LED - Electrical Engineering Stack Exchange
Transistors - SparkFun Learn
Transistors - SparkFun Learn
switches - Simplest LED-transistor switch LED being on in switch's off-state - Electrical Engineering Stack Exchange
Transistors - SparkFun Learn
Using Transistor as a Switch | ermicroblog
BJT Driving an LED - Above or Below? - Electrical Engineering Stack Exchange
Driving an LED using a Transistor
bjt - How to replace a green LED with a red one in a simple transistor switch? - Electrical Engineering Stack Exchange
Control System Basics - NPN vs. PNP Logic - Sealevel
Working of Transistor as a Switch - NPN and PNP Transistors
