[Fred Murphy] has an old Fisher-Price music box/record player
that has lost many of its disks over the last 40 years. It’s a
very simple device – concentric grooves in a plastic disk have
plastic bumps that are picked up by the tines of the record
player ‘cartridge.’ Seeing as how this toy is basically a music
box, [Fred] figured making his own records would be well within
his grasp; he did the reasonable thing and made a Stairway to
Heaven disk for a toy music box. To figure out where to place
the ‘bumps’ for the musical tines, [Fred] built a small tool in
Visual C# 2010 that allowed him to place notes on a scale and
generate the requisite GCode for the disk. After sending this
file to his CNC mill, [Fred] had an acrylic disk that played Led
Zeppelin on a child’s music box. Of course, this Instructable
wouldn’t be complete without a video demo of Stairway blasting
out of this record player. You can check that out after the
break.