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Reply to "Semaphore and 555 Timer Circuit"

Actually I think the only thing that was wrong was the cap on pin 1 instead of where it belonged, after pin 2 & 6. Pretty sure the real problem was my poor eyesight (cataracts they won't remove yet, maybe in a couple months) and I just had a jumper in the wrong spot and didn't (or couldn't) see it. (Not knowing what I am doing may figure into the equation as well. ) Must have checked those 555 jumpers at least a dozen times.

 

I did 2 things yesterday, tried a new 555 chip then took all the jumpers off the 555 and re-did them. I also changed the power to the 500k pot from pin 3 directly to power supply as Stan posted above. I now think the other 555 is fine though, never saw any magic smoke.

 

I am going to take it all apart later and re-do it to make sure my drawing is correct now, but I think yours where you moved the cap is also correct. I will try powering the pot from pin 3 again and see what happens when I re-do it later. 

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