Could use some help implementing schematic

Discussion in 'The Projects Forum' started by breegeek, Apr 14, 2011.

  1. breegeek

    Thread Starter New Member

    Apr 14, 2011
    Hi all,

    I am trying to put together this circuit from a schematic. It's a call detection circuit with an induction coil that senses the fluxuations in the EM field around a cell phone when it's receiving a phone call.

    I looked at the schematic, and I *sortof* understand what's going on: RF coil passes a small amount of voltage (?) into the circuit, where it is boosted enough to pulse an LED. Eventually, I want to take this pulse into a Zigby...

    Here is the schematic:

    and here is what I have put together...

    Any suggestions as to why this may not be working would be SO SO SOOOOOOOOOOOO appreciated!!!

    <3 bree
  2. SgtWookie


    Jul 17, 2007
    What is the part number of the 555 timer IC that you are using?
    What is the Vf and current of the LED?
    Did you substitute any parts?

    Your breadboard is quite spaghetti-like. You need to clean it up.
  3. Wendy


    Mar 24, 2008
  4. breegeek

    Thread Starter New Member

    Apr 14, 2011
    Thanks for the tips. I rely too heavily on jumpers...

    I will try cleaning up and post again. Thanks---bree