& >Because the liquid level will fluctuate, the mechanical switch of the water pump also jitters, which has a serious impact on stable and reliable detection. Therefore, tantalum capacitors and hardware debouncing are required. The charging and discharging process of the capacitor will cause some delay at the detection end, so the capacitance value of . is selected to achieve a reasonable delay anti-jitter effect. At the same time, in the design of B, the capacitor pin should be as short as possible and close to the RB pin.
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& >Because the liquid level will fluctuate, the mechanical switch of the water pump also jitters, which has a serious impact on stable and reliable detection. Therefore, tantalum capacitors and hardware debouncing are required. The charging and discharging process of the capacitor will cause some delay at the detection end, so the capacitance value of . is selected to achieve a reasonable delay anti-jitter effect. At the same time, in the design of B, the capacitor pin should be as short as possible and close to the RB pin. 