8 led effect with CD4017

RE: 8 led effect with CD4017

gihu — Sat, 05 Nov 2016 11:18:10 GMT

Really nice!!

DAB, it also takes me back to when I start study digital electronics, and to those times when you looked into those thick books (from national, ti...), with the thinnest pages I have even seen, to look for logic gates, latches, flip-flops, counters, BIN2BCD, BCD2BIN...

RE: 8 led effect with CD4017

D_Hersey — Sun, 09 Oct 2016 02:48:42 GMT

maybe a '191 for the counter and a '138 or a '154 for the decoder

RE: 8 led effect with CD4017

D_Hersey — Sat, 08 Oct 2016 04:38:33 GMT

https://www.youtube.com/watch?v=FLk0Ye2Vo7Y

RE: 8 led effect with CD4017

jw0752 — Sat, 08 Oct 2016 00:21:14 GMT

Hi Andrew,

I like your project. It is always fun to breadboard a circuit.

John

RE: 8 led effect with CD4017

D_Hersey — Fri, 07 Oct 2016 13:20:30 GMT

For what it is worth, if you used an up/down counter and a 3-to-8 or 4-16 decoder, and a F/F you might get the output to go back-and-forth instead of round-and-round.

RE: 8 led effect with CD4017

DAB — Thu, 06 Oct 2016 18:39:30 GMT

Ah yes, this is how we did displays in the old days.

A clock, some counters, LEDs and glue logic.

Takes me back a few decades, but we built some very capable systems in those days.

DAB