555 Schmitt Trigger Circuit

This minimal Schmitt trigger circuit uses the 555 IC and requires very few components to produce hysteresis. If you have a noisy digital signal that requires cleaning, and redefining with sharp edges, then this circuit does the job well. You feed your digital signal at the input and the output provides a clean square wave. When powered by a 5 V supply this IC produces TTL compatible logic levels, which is very useful.

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