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Zero-crossing refers to detecting the point at which a sine wave reaches the zero point of magnitude. In AC circuits it corresponds to the point at which no voltage is present so switching at that point reduces interference.

0 votes

Would this lazy zero cross detector work?

that's going to detect low voltage on the line, if that's close enough to what you need to know, then yes it would work.
Jasen  Слава Україні's user avatar
2 votes

Automotive alternator: zero crossing detection (frequency)

using an op-amp as a comparitor often ends badly, some op-amps (not OPA340) can be damaged by this. and performance almost always suffers. no you won't have 0V out the negative half cycle if you are …
Jasen  Слава Україні's user avatar
3 votes

Zero Crossing Detector Circuit

Q1 and D5 act as a pair of anti-parallel diodes allowing current to flow both ways through C1 when C1 is charging the current flows through D1, when discharging through Q1s base to it emitter. This d …
Jasen  Слава Україні's user avatar
2 votes

Will a zero-crossing SSR activate with shorted load contacts?

That data sheets says it has an SCR output stage, an SCR cannot be started with 0V across it. As for whether shorted output will trigger the zero crossing detector it's impossible to tell. maybe it wi …
Jasen  Слава Україні's user avatar