1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

A light detecting book light.

  1. Feb 2, 2009 #1
    Firstly, the book light works fine. I'm also attaching a circuit diagram.

    I don't really understand why the emitter of the transmitter (its marked with an E) takes in the current. Could someone explain to me how this circuit works?
  2. jcsd
  3. Feb 6, 2009 #2


    User Avatar
    Science Advisor

    There's a circuit diagram? :wink:
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: A light detecting book light.
  1. Light bulb (Replies: 6)

  2. Transport Light? (Replies: 14)

  3. Light and energy (Replies: 6)

  4. Light Intensity (Replies: 1)

  5. What makes light? (Replies: 15)