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by DavidMil
Mon Apr 29, 2013 11:45 pm
Forum: Nuts & Volts Magazine Discussions
Topic: Getting Started with Matrix LED Displays...
Replies: 0
Views: 3167

Getting Started with Matrix LED Displays...

Mr. Henry suggested a CD4017, but I used three 74LS154's (4 to 16 demultiplexer) when I built a scrolling sign about 12 years ago. It was something I had always wanted to do. And yes; I actually soldered 294 (7 x 42 rows) individual LED's, 42 2N2222 transistors, 42 3K resistors, seven 74LS04 Hex Inv...