Making an Electronic Message Display Board Part 1 - Theory & Prototype

For as long as I can remember, I have wanted to make a programmable illuminated message board of some kind. Now I'm going to do it!

Links related to this video:
Fran's channel:    / @franlab  
Applied Science - Building an electroluminescent display:    • Build an electroluminescent glass pan...  
Posy - Segmented Displays:    • Segmented Displays  
Yenji Jem - Six, Five & Four Segment Displays:    • Six, Five, and Four Segment Displays  
The 4 Kids TV Show - 53 Segment Display:    • 53 Segment display  
Tom Scott - What's The Longest Word You Can Write With Seven-Segment Displays? :   • What's The Longest Word You Can Write...  

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Timestamps:
0:00 Intro
0:23 Seven segments
3:30 Matrix displays
4:02 Sixteen segments
4:51 Design considerations
6:11 Scan multiplexing
7:07 Shift Registers
8:34 Breadboarding
10:14 Switch bounce
10:48 Troubleshooting
11:18 Arduino
11:43 Success
12:09 Mapping
12:34 Words
13:24 Plans