Android Controlled LED

Discussion in 'Homework Help' started by Haldin, Mar 27, 2014.

  1. Haldin

    Thread Starter New Member

    Mar 27, 2014

    I am an electronics dummy - I was wondering if there is anyway to turn ON/OFF an LED through USB/MiniUSB commands from an Android device?

    the LED can be powered through an external source (i.e battery/powerbank...etc)
  2. sirch2

    Senior Member

    Jan 21, 2013
    Well you can program your Android device to send data over the USB connection so I suppose you have to options:

    1) the proper way - use a Microcontroller to receive the data over USB and then illuminate the LED

    2) a hack which MAY work - connect the LED directly to the USB with a transistor to turn it on/off, e.g. LED/ transistor across the power/gnd with the transistor base connected to a data line. You would need to add a current limiting resistors etc. Then you would need your program to send lots of handshakes and ignore any errors...