Finished Pieces


    On this model I added a touch panel which can be used to trigger sounds and glitch effects simply by placing your fingers on the touch points. I designed and burned to circuit boards with a Speak&Spell logo as well as an arrow pointed pitch control touch pad. Touching the word “Speak” turns the unit on. “Spell” triggers a random letter. “&” triggers glitched blip sounds. The three touch pads to the right are all variations of a hold/distortion effect. This is by far the coolest effect I’ve found in a Speak&Spell in a long time!
    Read the schematic below to see how it’s done. It’s easy!


    In order to build this thing I had to do quite a bit of bread boarding to figure out how to make it all work. It ended up being an enormous pain to keep flipping the unit over to press the touch pad, then flip it again to work on the circuit. So I built a rotating harness from a few pieces of wood and a lazy suzan. It worked great! The bread board sat below the Speak on the turn table. Everything stayed together and I was easily able to turn the whole thing back and forth to work on it.


    Sorry, no sound files for this piece.

    9 Responses to “Touch&Spell”

    • 1

      vtol said:
      September 22nd, 2009 at 3:24am #

      very cool!

    • 2

      nicolas pauly said:
      September 22nd, 2009 at 7:27am #

      it’s amazingly very cool

    • 3

      Clarke said:
      September 22nd, 2009 at 11:34pm #

      Excellent work…very clean with the logo on the board & all, and it sounds great. Are you planning on posting the schematic for the pitch control touch pad?

    • 4

      Luke Wrong said:
      September 23rd, 2009 at 3:29am #

      That surely is a thing of beauty.
      I like the improv undo-able cable ties also…

    • 5

      ahmet yildirim said:
      September 23rd, 2009 at 9:03am #

      the box looks like nokia n900 pushn900 thingy
      check this out

    • 6

      casper said:
      September 30th, 2009 at 8:54pm #

      Clarke, The pitch adjustment doesn’t require a transistor. It is simply a touch point connected directly to the board. To see some other schematics that show where the touch point is (among other things) go to the Speak&Spell bending page.

    • 7

      alisadir said:
      March 22nd, 2010 at 11:28pm #

      hi casper big fan.
      it looks like the pc boards on this one are different than the usual speak and spells.
      i have the some one you have here and am finding it impossible to achieve the bends you have on your site is there a trick to adapting the bends to suit this different model.

    • 8

      casper said:
      April 11th, 2010 at 12:59pm #

      @Alisadir:I have found that there are 3 or 4 different kinds of boards, but they are all very similar. Some glitches behave a little differently, but the bend points are all relatively the same. If you want to email me a photo of your board I may be able to help more. pete[at]casperelectronics[dot]com

    • 9

      Pancra said:
      May 8th, 2013 at 1:32pm #

      Great webpage and projects! I am very interested in reproducing this pitch controller, it’s awesome! How did you do it? It’s simply a PCB with that shape? Do you think that if I connect it to Arduino, just by reading the analog value of that pin I would be able to use it like a pot?? Also, it’s that PCB coated? with what?

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