Zero Crossing Detection

309

03:54:27

Knowing when the AC is at zero is important with certain designs such as thyristor controls in conjunction with microcontrollers. This schematic can inform the interrupt input to take timing action when the AC is at zero - Good for phase control.
For isolation, you can use optical couplers - The type that have 2 led's back to back which, when connected to the AC line, can produce an open collector output pulse every zero cross time.

published 1 year ago

alancwms

1 year ago

I would like to see an opto coupler in the component selections!

JoDaGi

1 year ago

Nice work! Agree with the optocoupler's comment also. Making the secondary winding to 1kR a node really shows the effect well.

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.