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when toggle format what by license comment
Aug 12, 2012 at 23:35 vote accept Shubham
Aug 12, 2012 at 23:22 comment added mordac So was I. R1 is for the LED, R2 and R3 are for the photodiode.
Aug 12, 2012 at 23:19 comment added Shubham I understand that, but I was asking about R2 and R3.
Aug 12, 2012 at 21:40 history answered mordac CC BY-SA 3.0