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Figuring out NPN logic for LED control

@Retoxx
7 years ago
https://everycircuit.com/circuit/5508935992999936
Some of my first shots at circuit design... I’m trying to make various LED signs and have them flash in different orders and such... For this project, I want to display 4 groups of approx. 16 lights per group; with each group coming on in succession and holding until all groups are lit, then reset and start over. Sounded simple enough... lol! Here I am several hours later, and this is how far I have gotten... yay me! Flip the switches on the right (logic fashion, it’s an OR gate, and I’m simulating a decade counter with the switches - so only one should be “on” at any given time for the pulses of 0,1,2,3) to make zee LEDs light!
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