Simple 9V switch. Photodiode or Photoresistor?

Thread Starter

Dentsu

Joined Jul 7, 2011
47
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.
 

iONic

Joined Nov 16, 2007
1,650
Given that the light in a pocket can vary quite a bit I might lead towards the sensitivity and tunability of the photo-transistor.
 

Thread Starter

Dentsu

Joined Jul 7, 2011
47
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.
 
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