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How to connect 74ls 132 and shape the waveform with Schmidt trigger?
74ls 132 is a 4-2 input non-Schmitt trigger. You connect the two inputs of 74ls 132 as input, so that Schmidt shaping can be performed. The output square wave is inverted, and you can input the output to the input end of another NAND Schmidt trigger, so that the output phase is right. Alternatively, one input terminal can be connected to a high level of 5V, and the other input terminal can be used for input. Your lm324 uses a single power supply of 5V, and the maximum output wave is about 3.5V Only when the amplifier is large enough will there be a square wave output.