We are using a smoke sensor in our project.
The circuit diagram has been attatched
We borrowed the circuit diagram from somewhere,but it didnt give a proper explaination to it.
we would like you to give a breif explanation of ckt , including flow of current especially from the transistors.
from the circuit ....what we understood is when light falls on the phototransistor it does not trigger the 555 timer, so the LED does not glow
and when light path is obstructed the 555 timer is triggered and the LED glows indicating smoke sensed
The circuit diagram has been attatched
We borrowed the circuit diagram from somewhere,but it didnt give a proper explaination to it.
we would like you to give a breif explanation of ckt , including flow of current especially from the transistors.
from the circuit ....what we understood is when light falls on the phototransistor it does not trigger the 555 timer, so the LED does not glow
and when light path is obstructed the 555 timer is triggered and the LED glows indicating smoke sensed
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