EDN

Low-component-count zero-crossing detector is low power

There are many circuits publishedshowing zero-crossingdetectors for use with 50- and60-Hz power lines. Though the circuitvariations are plentiful, manyhave shortcomings. This Design Idea shows a ...
Electronic Design

Zero-Cross Detectors Deliver Positive And Negative Triggering

This design idea explains how a zero-crossing detector circuit can be used to control triacs. Fig 1. This zero-crossing detector circuit generates the control pulses needed to turn on triacs that ...
Electronic Design

Zero-Crossing Circuit Avoids AC Noise

Explanation of how a diode divider can tame powerline noise on a zero-crossing detector's input circuit, improving ZCD sensitivity. To properly control ac sources using solid-state devices, you need a ...
EDN

Measuring Power regulated by Zero Crossing SCR Controllers

A zero crossing SCR controller is used to regulate the power delivered to a resistive load. The controller uses two Silicon Controlled Rectifiers (SCRs) connected back to back in opposite directions ...