/diy/ - Do It Yourself

>>1268122
Schmitt trigger (two point switch) is a function, not a component. The LM393 is configured to perform that function via R2, R3 and R7. The output (1) goes HIGH when the input (2) is at about 4V and it goes LOW when (2) is at about 8V.

This is not really necessary because the 4017B (pic adapted to show that) already has that function built in for its two clock inputs and simple RC debouncing would have been good enough.

I had the impression that the original questioner wanted a sequencer which could be easily realized by configuring the 393 as a clock generator. A 555 could do likewise. Remote launch from the model bunker is also possible.