hi, i am doing a simple small project powered by a 9v battery so which one would be better given my situation? the idea is when it see light it turns the system on (even night time) when it is in complete darkness it turns the system off (pocket for example). i know photodiode will be faster and transistor will be more sensitive. which one? i need my device to be already on when i take it out of my pocket.

 

Given that the light in a pocket can vary quite a bit I might lead towards the sensitivity and tunability of the photo-transistor.

 

Photodiode or ldr is better as transistor is nt a photosensitive switch

 

Photodiode or ldr is better as transistor is nt a photosensitive switch

Sure there are.

Photo Transistor

 

i am slowly making my way through the video tutorial and wondering if anyone have the time to make a schematic given the requirement? i want to order the parts now and by the time i am done all the videos i want to start soldering and not have to wait 2-3 weeks. simple one or a list will do. thanks.

 

anyone know which one i can pick up? or will any phototransistor will work? will this one work? it is hard to read those technical detail..