Technical Specs


  • Propeller Processor (eight independent 80MHz cores)
  • 1.5 MByte SRAM
  • 44kHz 20-bit sampling (2 input channels and 2 output channels)
  • 4 control knobs
  • 16×2 character LED back-lit LCD screen
  • 2 stomp switches
  • 2 stomp indicator LEDs
  • 1 1/4 inch audio input
  • 1 1/4 inch audio output
  • 1 multipurpose 1/4 inch audio jack (can be used as either a second output (for stereo effects) or as an additional input (for modulation effects etc.))
  • NTSC Video out
  • Micro USB
  • 9V DC Power in
  • Headphone out (mini phono jack)
  • RJ11 expansion port (for potentially adding things like external guitar pedals. Uses I2C.)
  • Rugged steel chassis


  • 9V Wall Adapter
  • Mini-USB Cable
  • CD Containing:
    • Software:
      • OpenStompTM Workbench for WindowsTM
      • Full Coyote-1 O/S Source  (GPL3 Licensed)
      • All currently completed effects, with source code (GPL3 Licensed)
        • Tremolo
        • Chorus
        • Distortion
        • Delay
        • Tunstuff (Layered repeat loop)
        • Test Tone
      • Pong w/source (just for fun)
    • Patches:
      • Demo patches using the released effects (Creative Commons licensed)
    • Documentation
      • Coyote-1 User’s Manual
      • Coyote-1 Schematics
      • Parallax’s Propeller Chip documentation
    • Utilities:
      • Parallax’s Propeller IDE (The code development environment for the Propeller Chip)


I’ll get a proper copy of the schematics up on this site shortly.  In the meantime, if you go to my Parallax 2008 Design Contest entry page you’ll find a link for the contest submission documentation, in the downloads section near the bottom of the page, and inside that document you’ll find a copy of the schematics.

Source Code

Coyote-1 O/S

Latest O/S release: Coyote-1 OS

O/S code releases up to 2.01.02 were maintained and posted to the forum here.

Beginning with version 2.01.02 the code is maintained as an SVN (Subversion) repository on Google Code at

I’ll be releasing the source code for the OpenStomp Workbench application as well, but I haven’t gotten it posted to Google Code yet.

I always loved guitar effects and music. My effort is constantly directed towards new and innovative products that will make your job easier, help you develop your skills further and spark your creativity, while trying to keep the cost within reasonable bounds.

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