1 How Shift Registers Work!
A clear explanation of how a 74HC595 shift register works and how to drive many LEDs from a few Arduino pins.
Channel
Kevin Darrah
10 recommended videos. Channel on YouTube
2 How to Control a Ton of Inputs using Shift Registers!
Explains how a shift register can scan many buttons or inputs from a handful of Arduino pins, sometimes linked alongside the same creator's output video.
3 Low Power Arduino! Deep Sleep Tutorial
Shows how to put an ATmega328 into deep sleep and wake it with interrupts or the watchdog, reaching microamp currents on a bare chip.
4 Low Power Arduino! Kill Power Circuit Tutorial
Shows an Arduino cutting its own power through a transistor after a button press, offered as an example for battery projects that need near-zero standby current.
5 Level Shifting Tutorial 5V-3.3V Quick and Dirty Methods
Walks through several cheap ways to shift logic between 5 V and 3.3 V and compares how each holds up as frequency rises.
6 I2C Bit-Banged without Microcontroller!
Praised as a visual walk-through of the I2C protocol, driving the bus by hand so each clock and data transition can be seen.
7 Easy Addressable LEDs with Arduino! WS2812B Tutorial
Cited for showing how to drive WS2812 style addressable LEDs directly from a microcontroller without relying on a library.
8 How to Drive LEDs - Easy Constant Current Circuit
Shared as a practical explanation of driving LEDs at constant current with a shunt regulator and a transistor instead of a resistor per LED.
9 How to Control a Ton of RGB LEDs with Arduino & TLC5940
Demonstrates using the TLC5940 multi-channel PWM driver with an Arduino to run many RGB LEDs, suggested whenever someone needs more PWM outputs.
10 RF Links Tutorial - Cheap and Easy Wireless Arduino!
Offered a few times as an explanation of the low-level encoding behind basic radio modules, though commenters recall it only loosely.
