notes to self

a document of a plodding mind

  • diy arduino dev board

    diy arduino dev board

    simple dev board made from some cheap 400 contact breadboards on a piece of acrylic.

    abram

    May 26, 2014
    notes
  • LFO modulated simple VCF

    LFO modulated simple VCF

    this is a rough draft of a circuit i’ve been working on based of the Simple VCF circuit floating out there. a big thanks to the original author for that. i’m sure there are some mistakes in here. it’s an odd one for sure, but it works on the breadboard. the opamp is a TL072.…

    abram

    May 23, 2014
    notes
    circuit, lfo, tl072, TL082, vcf
  • Dissolved penny

    this penny has almost completely dissolved in a three month period in a solution of vinegar and salt. last time I opened the jar, it had pressurized most likely due to the hydrogen gasses being released.

    abram

    May 20, 2014
    notes
    chemistry, experiments, science
  • keeping the internet neutral…

    Help stop the FCC from allowing telecom giants to divide up the internet.

    abram

    May 14, 2014
    notes
  • new binary album out on already dead

    anticipation of something else by The Binary Marketing Show Featuring ye olde Mellotronium and a bunch of other stuff.

    abram

    April 30, 2014
    notes
    binary marketing show, experimental, music
  • Running Up That Hill: Kate Bush Covers for Reproductive Rights

    Running Up That Hill: Kate Bush Covers for Reproductive Rights by Various Artists

    abram

    February 15, 2014
    notes
  • DOD FX69B Grunge insanity mod…

    this “insanity” mod makes this pedal sound much more insane that the original version. i dropped in a couple of germanium clipping diodes between gain stages for a warmer, beefier tone and decided to mess with the active filters that control the two-band EQ. the filters now allow each band to be driven into cutoff…

    abram

    September 8, 2013
    notes
  • mellotronium 2.0: rebuild

    after our move to Oregon two months ago, i’m finally getting back to a spot where i can do more building and experimentation. that being said, my arduino-based sampler/synth is getting a rebuild to make it more capable and road-worthy. the LED segment display is currently showing voltage out what should be 5v DC. i…

    abram

    August 12, 2013
    notes
    Arduino, atmega2560, bjt, sampler, synth
  • inside an EL84…

    a close-up picture of the guts of a JJ EL84 with all it’s grids exposed. such a seemingly odd and fascinating device.

    abram

    May 26, 2013
    notes
    6BQ5, el84, electron, inside, jj, open, tube, vacuum
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