3 Simple Zero Crossing Circuits

The Zero Crossing Point. The point where the AC line voltage is 0 V is the zero cross point, the Zero crossing point. Applications of this circuit , Phase control rectifier , Ac Voltage Controller, Soft Start for Induction Motor etc.

[@onlyme8477]

I usually use an optocoupler.

[@kenwood0093]

네. 감사합니다~

[@odissey2]

It seems that neither circuit provides precise zero-crossing

[@rajgunaseelan44]

Yes right. In diode or transistor based zero crossing detectors, the 0.7 Volt will be the detection point. For precise detection, use opamp based circuit.