Schmitt trigger help
Here is my simulation, which works:







simulate this circuit &ndash; Schematic created using CircuitLab

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The upper-trip-point (VUTP) is 2.3 volts, what you wanted. But the lower-trip point (VLTP) is about 2.15 volts. You will need to adjust the resistor values. Do you need more help with that?

And the lesson here is, don't always trust online calculators!