Visible light communication system Receiver

Discussion in 'The Projects Forum' started by sycandy06, Jan 5, 2010.

  1. sycandy06

    Thread Starter New Member

    Jan 5, 2010
    Hi, I'm doing a project of using LED light to transmit data. for the receiver part, i've to start with a Bandpass filter which center frequency at 100kHz. I've designed a second order Sallen key Bandpass, but the result of the schematic doesn't at 100kHz..It has a little bit distortion. How can i fix this problem??
  2. JDT

    Well-Known Member

    Feb 12, 2009
    Are you trying to build this 100kHz band-pass filter with an op-amp?

    If so, that will be the source of your trouble. Unless you use a seriously high-frequency amplifier.

    Best to use a passive filter at this frequency. A simple L-C tuned circuit will do. More complicated designs exist but will need a lot of circuit elements and mathematics!
  3. maogibba

    New Member

    Jan 4, 2010
  4. thebigk7

    New Member

    Aug 15, 2011
    hi, even I'm working on visible light communication project, any ideas on implementing the transmitter section using a laptop and LEDs ?thanks in advance