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 ...

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 ...

Via separate diodes, the two zero-crossing detector pins connect direct to the live and neutral rails after the appliance EMC input filter – input AC1 must go to neutral and AC2 to live (top diagram .

A while ago I needed a piece of test gear – an isolated way to transfer zero-crossing information from a variable ... I came up with circuit on the left of the top right diagram – essentially, there ...