Keyboard and display multiplexing - Charlieplexing - Embedded.com
Charlieplexing Arduino - Controlling 12 LEDs with 4 GPIO Pins
The Charlieplexing
Charlieplexing Tutorial: LED Matrix Panels | Arrow.com
Multiplexing 32 Buttons and 32 Leds?
The Charlieplexing
multiwingspan
Controlling 20 Led's From 5 Arduino Pins Using Charlieplexing : 8 Steps - Instructables
Charlieplexing - Wikipedia
Extended Charlieplexing - LEDs and Multiplexing - Arduino Forum
Charlieplexing - jpralves.net
WaynePlexing Push Buttons (or, read 6 buttons using only 3 I/O pins) - Wayne's Tinkering Page
Charlieplexing - Wikipedia
Tucoplexing: A New Charliplex For Buttons And Switches | Hackaday
WaynePlexing Push Buttons (or, read 6 buttons using only 3 I/O pins) - Wayne's Tinkering Page
multiwingspan
Encode dozens of buttons with only four lines - EDN Asia
What maximum number of buttons i can connect to Arduino (100 buttons and more) - Electrical Engineering Stack Exchange
