T&L Publications

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...