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Reply to "Semaphore and 555 Timer Circuit"

Originally Posted by gunrunnerjohn:

Can you post the TinyCAD file for that one?

 

I suspect the counter is coming up with odd outputs, there is no reset with the circuit.  I'd tempted to connect a .1 uf cap to the supply and reset, and a 10K resistor from the same junction to ground.  That would give you a power-on reset.  I think if you left it run for a spell, that would all work itself out.

 

Don't know why you'd need the 100k.

 

Certainly, here it is.

 

I will try letting it set for a while and then add the new cap and resistor and see what happens.

 

It was a couple of years ago I was fiddling with this and I have no idea what the 100k was there for? I don't remember the two N/S LEDs on start up either, it was all working before, or so I was thinking?

 

 

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