Mel Lester Jr

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When our main bathroom is occupied, backtracking is required to reach the 2nd bath. An occupied signal at the detour would save frustration
Bathroom monitor
21
Driving a Single Digit 7 Segment LED Display requires 8 of an Arduino's 20 or so I/O pins. Using a 74HC595 shift register only requires 3.
7 Segment LED Displays 102 -- Using a Shift Register
55K
Seven Segment LED Displays are everywhere and are available in many configurations. This tutorial will show you how they work.
7 Segment LED Displays 101 - How To Make One Work
38K
Have you ever wondered about how a 7-Segment LED actually works? This is a basic tutorial for using these inexpensive 4 digit displays.
Sparkfun COM-11408 4 Digit 7-Segment Display Hookup Guide
9.7K
Control RGB or RGBW single-wire addressable WS2811, WS2812 or SK6812 LED strands up to the limits of your power or Micro-Controller memory.
Arduino Compatible Nano NeoPixel Controller
40K