Air conditioning zero crossing detection circuit diagram

Test - lowercase jpg

Kaixin micro test

Adjustable capacitor Murata genuine original

Test probe P100-M3

TZC3Z030A110R00 MURATA Murata adjustable capacitor original spot

The zero-crossing detection circuit is shown in Figure 1. It is used to detect the zero-crossing point of AC220V, sample the full-wave rectified signal in the rectifier bridge, and form a shaping circuit through the triode and the resistor-capacitor to form a pulse wave, which can trigger an external interrupt. Zero detection. The sampling point and the shaped signal are shown in Figure 2.