1 Reply Latest reply on Jun 24, 2015 9:09 AM by DiegoV_Intel

    Turning off Mini-Breakout Boards DS1 and DS3 LED Lights

    BradStell

      Hello everyone,

       

           Is it possible to turn off the DS1 and DS3 status LEDs on the mini breakout board? I am developing on the Edison for an end application that will be VERY power sensitive as it will have to last in the field for as long as possible. I know it may sound a little over the top, but I am trying to reduce power consumption everywhere I can.

        • 1. Re: Turning off Mini-Breakout Boards DS1 and DS3 LED Lights
          DiegoV_Intel

          Hello BradStell,

           

          I've checked the Mini-Breakout schematic and none of both LEDs can be turn off permanently. The DS1 LED is controlled by the BSS138 transistor which is always active, so the LED remains always ON. The BSS138 transistor is controlled by the RESETOUT# pin of the Edison module. The RESETOUT# is an output pin that will set LOW each time there is a system reset. So the only time when the DS1 LED is off is when a system reset occurs. After that, the LED will be ON again.

           

          On the other hand, the DS3 LED is controlled by the !CHRG pin of the BQ24074 IC , which is a battery charger and also the voltage regulator that provides the proper VSYS voltage level to the Edison module. This LED will be OFF when a battery attached is fully charged.

           

          Regards,

          Diego.

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