daviddoria
New Member
I am trying to make 2x 4017 timers count to 20! haha i'm sure i can just get a 20 output counter IC, but this is fun hehe.
so the idea is this:
i have 2 555s and 2 4017s.
i have the last out put of the first 4017 turn off the first 555 and on the second 555. i have the last output of the second 4017 turn off the second 555 and on the first 555. make sense?
the only problem is maintaining the state (on or off of the 555) while the other chip is counting to 10. i have been reading about transistor switch circuits, but i don't understand.
anyone have a good example circuit?
thanks
david
so the idea is this:
i have 2 555s and 2 4017s.
i have the last out put of the first 4017 turn off the first 555 and on the second 555. i have the last output of the second 4017 turn off the second 555 and on the first 555. make sense?
the only problem is maintaining the state (on or off of the 555) while the other chip is counting to 10. i have been reading about transistor switch circuits, but i don't understand.
anyone have a good example circuit?
thanks
david