Audio Visualizer This music activated colour organ responds to audio signals by activating individual rows of LEDs depending on its low, medium and high frequencies.

COMPONENTS •  Wood Frame •  4x potentiometer •  Fuse •  3x Christmas Lights (different colours) •  Wires & wire strippers •  Transformer • RC Filter (Low & High Pass) • Silicone Controlled Rectifier (SCR) • Various resistors and capacitors • Soldering Iron & solder • Wires & wire strippers • Prototype matrix board

WIRING An   electrical   signal   comes   from   the   audio   amplifier   via the   speaker   wires   and   into   the   input   of   the   transformer. The    220uF    capacitor    is    used    to    help    filter    electrical noise.   The   transformer   is   used   to   step   up   the   incoming AC   voltage   amplifying   the   signal.   This   is   then   applied across   the   master   potentiometer   which   controls   the   AC audio   voltage   level   across   all   three   low   medium   and high    potentiometers.    The    RC    filters    determine    which frequency    is    allowed    to    pass    though    to    activate    the attached lights.

3D Files This    project    was    made    using    hardboard    from    Home Depot   as   the   display   box,   and   a   bandsaw   to   cut   out   the design.   The   3D   are   provided   below   for   dimensions   and assembly instructions.

Source Code To   download   the   source   code   and   printable   files   visit   the Github and Thingiverse links below. For additional information email me at