TL;DR: I need to replace the button S1 by a circuit/component that could close the circuit which the button is closing by applying a 5V signal (with 0.5s duration) in the new circuit/component.
Well, I started designing some circuits without microcontrollers, so I could study and learn the functionalities of some components. In this circuit I tried to implement a toggle effect in the 555 OUT pin, I mean: when I press the button the OUT goes high, when I press it again it goes low and so on.
The circuit works with the physical button, but I need to toggle the 555 OUT with a 5 volt signal with duration of 0.5s.
I tried to figure out a solution but it's terribly expensive and complex in my opnion. So, what's the best circuit/component could I use to replace this weird solution?
Any help would be appreciated!