Friday, 29 September 2017

WHAM Jammer - Build it!

Here's a cool project for the guitar players out there. The WHAM Jammer is a circuit that connects to a DigiTech Whammy 5 pedal through the Midi port and makes it do things that might be considered....unnatural.

The following video shows you how to quickly build the circuit on a breadboard so you can try it out. I'll get to work on designing a proper enclosed version.

Download the software and schematic HERE

If you want to build a permanent version in a custom enclosure, watch this!

Parts List (with Amazon affiliate links)

1 - Arduino Nano (clone version)
1 - Breadboard
1 - 6N138 Optocoupler
1 - 1n914 Diode
2 -  5 Pin Midi Jack
3 - 220 Ohm Resistor
1 - 1K Ohm Resistor
1 - 470 Ohm Resistor

Parts for Enclosure

1 - Adafruit Perma-Proto 1/2 Sized Breadboard
1 - Chip Socket - 8 Pin
1 - Header - 2 Pin - (or cut from longer Breakaway type)
1 - Jumper - 2 Pin
1 - Hammond 1590BB Aluminum Enclosure - Red preferred
2 - Panel mount MIDI Jacks
1 - DC Barrel Jack - 2.1mm
4 - Rivets - 1/8" Aluminum - 1/4" Grip
2 - M3 PCB Standoffs - 10mm
4 - M3 x 6 - Button Head Bolts
4 - Rubber Feet - Adhesive

Gear used in video

DigiTech Whammy 5 pedal
M-Audio MIDISPORT 2x2 Midi Interface
Hakko FX888D - Soldering Station


  1. Pretty Cool, It will work with Wahammy 4? (a lot of double u on a short frase)

    1. Hi Claudio. I don't have a 4 so I have no way to test. But I would say no.

    2. it works with Whammy DT, thanks Dave

  2. The link for the midi interface is no good, please fix

  3. Now you can win free stuff online, free giveaways, enter every day to win latest iphones, smartphones, macbooks, laptops, accessories, technology and much more at

  4. So will this work as a sequencer for my Whammy 5? If so, how do I program a sequence into the nano? Thanks!

  5. Superb posts with lots of information!!! This is really the most miraculous blog site dude….

  6. This is really an excellent blog as well as its content.