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    This Instructable will show one how to make music with a wheel addition to a UNIQUE stringed instrument..
The unique idea here is to change the tone of an  elastomeric polymer string via a rotating wheel. An earlier Instructable showed how to vary the pitch by changing the tension of the string. The listing was dated July 7 ,2011 "Vary pitch music instrument" by Mistic.
It was made for the kids to have fun on but later  the device was revised to  re-arrange  the  layout to provide  added sets of strings and change the direction of the pointer [cursor]  to low notes on the left and higher  extending to the right.
     The addition of a wheel to reverse the direction of the pointer was then introduced .   and a scale was then added to mark  three octaves of notes. Now the notations can be used to play from a music sheet..With 3 strings  the two left strings are used to produce chording accompanyment.
    More strings means higher tension is required by the pointer.  With the wheel addition the  tension can be controlled  easily by using a thumb post to squeeze the hand to vary the tension.Also not shown here the Pulley {block-and-tackle ) simple machine  using two wheels  can produce a mechanical advantage and a low tensioning  and an increase in length of the scale by a factor of two.
    There is an alternate  method to lower pointer tension and that is the  use of the law of the lever.Add an extender rod to the wheel and rotate the wheel very easily with half the applied tension .[Mi x a=M2 x b }.a= wheel radius and  b is rod length.This causes tension force  to be lower[M2].




Step 1: Scale impovement using a wheel.

The first unit was made  using a ring with sides mounted to give a guide effect to the string around the circumference.

Imrovements- Use a spool from a depleted fishing cord, It has  built in sides  and this will keep the string  uniform around the edges and improve the music scale: Another improvement is -the wheel is used as a guide in this example.String not anchored to the wheel.

          l       [00] ....................[xx]    string length
          l     nut                       bridge     l= 5 inches. Known as the  SCALE.
          l
          l
          O   wheel   2 in. dia.
         l
         lNotes scale..l= 6.in.  -------------------------------------------------------------------------------------------xx
                                       G -G#-A-A#-B-Cm----------------------------C-------------------------------------C.
Now the  notes scale  can be increased to 10 inches to yield  another octave.[ 3 full octaves].


Now that's a creative way of producing music. Genius. We should use this on <a href="http://www.findafunctionband.co.uk" rel="nofollow">Find a Function Band</a>.
And its fun to play.

About This Instructable

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Bio: A retired electronics engineer -motorola. delveing into new craft ideas and contest entries.
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Tags:MUSIC
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