Manufacturing guy-at-large.

Notes on Powersaving modes

Added on by Spencer Wright.

Today Zach and I are playing with powersaving modes on The Public Radio. This was all done with this commit; cases were tested by commenting out lines 42, 45 and 46 and varying volume via our potentiometer. Current is being measured on Vout of the VREG on hardware v1.1. 

  1. MCU ON (sleep disabled)
    1. Amp OFF (shutdown enabled)
      1. Si4703 ON
        • .019A
      2. Si4703 OFF
        • .004A
    2. Amp ON (shutdown disabled)
      1. Volume @ 100%
        1. Si4703 ON
          • .050-.100A
        2. Si4703 OFF
          • .004A
      2. Volume @ 0%
        1. Si4703 ON
          • .026A
        2. Si4703 OFF
          • .004A
  2. MCU OFF (sleep enabled)
    1. Amp OFF (shutdown enabled)
      1. Si4703 ON
        • .016A
      2. Si4703 OFF
        • .004A
    2. Amp ON
      1. Volume @ 100%
        1. Si4703 ON
          • .030A-.090A
        2. Si4703 OFF
          • .004A
      2. Volume  @ 0%
        1. Si4703 ON
          • .023A
        2. SI4703 OFF
          • .004A

There are some weird things going on here. Our powersaving mode isn't having quite the effect we're looking for, either.

More work to come.