Finished Pieces


    At the heart of this piece is a BOSS PS-3 pitch shifter pedal.
    I’ve added a few noisy bends and a pitch control joystick.
    The joystick allows for much more expressive adjustment of the pitch than the tiny little knobs do. The pedal has a few different modes including an echo. In echo mode, the center two knobs control echo rate and decay. For this mode it may be desirable to have knob control instead of joystick so I added a switch that toggles between knob and joystick control.

    I removed the circuit and all of the hardware and mounted it on an aluminum plate which a cut down to fit in a pelican case. This is a design I like quite a bit as the pelican cases are rugged as hell and look pretty swank.
    It takes a little bit of work since I need to make posts which bolt to the inside of the case and to the face plate. Also the inside of the case slopes in slightly so getting an accurate measurement of the exact face plate size can be tricky.

    The bends are pretty noisey and do a lot of bit crunching effects. The hardest part about working on the new boss pedals is that they use mostly surface mount components and you need to use very thin wire. If you use heavy wire it could very easily pull leads and components off the board if pulled or bent the wrong way.
    When using very fine wire, you HAVE to use heat shrink tubing where it is soldered to hardware or zip tie all of your wires to minimize connection movement

    I may put a schematic up eventually, but probably not. If you want to bend one of these, you should just get in there and poke around. It’s not hard at all to find interesting bends. Don’t expect to find a huge variety though. I found a few variable distortion/bit crunch effects and a loop effect.

    This piece was built for gore core electronic artist Otto Von Schirach. In honor of Otto, I affectionately refer to this piece as The Spewing Gut Pile.


    Sorry, no sound files for this piece.

    7 Responses to “BOSS PS-3”

    • 1

      Peasants With Feathers said:
      December 17th, 2009 at 8:02am #

      Do you have another BOSS PS-3 ? With different artwork.

    • 2

      casper said:
      February 18th, 2010 at 1:35am #

      @PWF: I don’t, sorry. It’s a cool pedal, but I don’t know if I’ll be building another any time soon. It was a LOT of work!

    • 3

      James said:
      June 14th, 2011 at 2:26am #

      That looks amazing mate!
      Excellent work…
      … and lovin the site, thanks for sharing your pearls of wisdom!

    • 4

      Paul Noize said:
      June 14th, 2011 at 3:50pm #

      Hey Caspar,
      this machine blows my mind and gives me shivers, when Otto is using it. Really tricky how you assembled the controls and not even mentioning the effects it is capable of.
      I just bought an PS-3 and want to modify it kind of like you did, not that I have your skills or much practise..
      My goal is pretty accomplished if I sort out the in’s/ out’s/ power supply and my most favorite part, the JOYSTICK (not self-centereing ones are hard to get here..) to control both pitches. Anything beyond that is even more awesome, but I’d be happy with these “basic modifications”
      I will use every advice you shared on this page/ your website about it, but if you got a spare one about this especially, I would be more than pleased. Thanks for the inspiration.
      Feel free to hit my email anytime.
      Cheers Paul

    • 5

      spacelordmother said:
      March 3rd, 2017 at 12:29pm #

      Old post I know — but any info on how you wired the joysticks up to the 2 middle encoders? I love the way the PS-3 glitches the repeats on the delay mode when you turn the knobs and would love to have this wired to the expression jack. Thanks for any information!

    • 6

      casper said:
      March 3rd, 2017 at 1:24pm #

      The simplest answer is that i rewired the pots on the PS-3 to the pots on the joystick, pin for pin. A bit more detailed answer is that the control pots on the PS-3 are all voltage dividers.. that means they have +5 volts on one side of the pot and ground on the other side…. then the control voltage comes out of the middle pin. That configuration (which results in a voltage divider) can be done on any nearly any three legged pot… like the ones in the joystick.
      You can also simply apply a voltage to the control voltage input point on the PCB… but I can’t guarantee that you won’t harm your pedal if you feed external voltages above 5volts or below zero to the input

    • 7

      spacelordmother said:
      March 4th, 2017 at 9:56am #

      I figured it wasn’t too intensive, but knowing how some chips work (umm, die) when you connect the wrong pins I thought it best to inquire.

      Thank you!

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