Light dimmer circuit, need some help with connections

So bascially, the bottom optocoupler (U5) is the zero cross detector which will send a pulse to pin 3 when a zero is detected and fire an interrupt. This interrupt will trigger a timer which will fire the second optocoupler(U7) when the timer has elapsed (Brightness level will determine the time delay)

Now for my question, I want to know if I connected everything fine, especially the triac part, I am unsure about that