Turn the 741 into a schmitt trigger, rather than trying to explain see:-
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4 years ago
Basic circuit help please
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4 years ago
Thank you, I did find a video showing that, but this page is much better. Mikek
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4 years ago
I may need a little more input, I have a voltage the sets at 5V, then drops to 2V. A negative going pulse. That is the 555 trigger on Pin 2. I need the output to go low when the input goes low.
Mikek
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4 years ago
positive swing on the schmitt trigger input to cause the negative output. Mikek
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4 years ago
Swop over the LDR and pot?