marcy

[jitterbug]

I want to build a circuit where when I push and hold a momentary contact switch led's light up one at time and stay lit until all 40 are lit and the button is released. I built a circuit using 4017 decade counters but, they come on one at a time and don't stay on. I was wondering if I could use shift registers? Or if it would be better to use a pic. Any suggestions would be greatly appreciated

 

[Hero999]

Please don't post the same thing over and over.

https://www.electro-tech-online.com/threads/led-light-display.102944/#post838750

If I asked you the same question three times would the answer be any different the third time than the first or second time, except you might say I've already told you?

 

[mneary]

Maybe we should start giving random answers on second and third duplicate threads.