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Zero Crossing Detection

If veroboard is close by, using it with AC sometimes seriously catches up to me in flames and sparks all over my work bench!
Think twice when you use a veroboard with alternating current or AC grid for that matter! 
Below is a not good result on my work bench! 

Wood bench damaged with electric spark

Then below my second attempt without errors on the veroboard:

Zero Crossing Detection Soldered Bottom Side Veroboard

To enhance this basic design, I incorporated a capacitor into the live input line and included a built-in 1 megohm resistor for safe voltage dissipation. Additionally, I introduced a 47k ohm, 1 watt resistor in the neutral line to mitigate inrush current surges. 

Zero Crossing Detection Electronic Circuit Diagram

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