Button debounce circuit diagram

SMD aluminum electrolytic capacitor

Industrial Router Crystal 3.2*2.5mm 3225 26M (26.000MHZ) 12PF 10PPM 20PPM 30PPM

Button anti-shake circuit control circuit

The circuit using the RC integration circuit to achieve clutter filtering and waveform trimming is shown (Figure 1).
At the moment of S1 ON, due to the contact bounce, the voltage at point A will exhibit a high-speed intermittent phenomenon, and then S1 OFF
The time is also the same (as shown in Figure 2). However, since the voltage across the capacitor needs to be slowly charged by the voltage through the resistor, it will rise, so that the potential of the B point rises slowly: S1 OFF, the capacitor voltage passes through R. Discharge
The voltage at point B drops slowly. This change, after trimming in reverse with Schmitt, yields a standard negative pulse output, as shown by the waveform point C.

figure 1

figure 2