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LED lights on/off via radio

Discussion in 'Other DJI Multi-Rotors' started by WetCoastWillie, May 29, 2014.

  1. WetCoastWillie

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    I am looking to control the on/off function of some LED lights via the radio.

    I have (ordered) the Futaba 14SG and the DJI A2.

    Can someone please point me to a "how to" thread or video.

    Thanks

    Matt
     
  2. OI Photography

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    The simple way would be to just put one of these in-line with the power supply to the lights: http://www.ebay.com/itm/New-RC-Receiver ... 4d114b3c6c

    It plugs in to any output channel on the A2 that you want to use, just assign your preferred switch to that channel and it will switch the lights (or whatever you have that connected to) on and off.
     
  3. WetCoastWillie

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    Thanks OI.... but what I want to know is whats under the hello heat shrink in that item.

    Is the channel on the A2 just wired in series to the + or - lead like a regular switch would be, is there any other circuitry required, is there any voltage coming from the A2 or is it just a switch leg?

    Cheers!

    Matt
     
  4. ladykate

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    re: under the heat shrink

    Typically it is an electronic switch that is triggered by a capacitor smoothed input from the PWM or other output of the rx. The rx output signal is a signal modulated consistent with the tx stick or switch position - it is low voltage and low power and not DC. It must be converted to (in this case) a triggering voltage. The A2 output would not be acceptable for switching on LEDs - you want them on/off so you must detect the 50% (nominal) level and go from open to closed on the LED electronic switch. Driving a device directly from the rx would be possible in some cases but not wise - burning up the rx is not only possible but probable. Your servos (on RC planes) have their electronics on board for isolating the rx output and handling the conversion and interpolation of position of the servo arm. The ESCs measure motor commands based on the NAZA inputs modified by the rx requests and send relatively high current and voltage to the motors.
     
  5. WetCoastWillie

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    Thanks!

    That's what I needed to know.

    Matt

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