Premis

• the wind chime center weight swings and knocks the tubes
• sensors pick up knocks and trigger the led's
• led's quick on, then fade off
• led's brightness determined by knock value

Setup

• LED's are mounted in the bottom of the tubes (i drilled a hole through from the top)
• knocks on the tubes are picked up by
  • (a) piezo sensors mounted on the tubes,
  • (b) tilt-switches mounted on the tubes,
  • (c) corresponding copper strips on both the center weight and the tubes (connecting to make circuit),
  • (d) piezo strip mounted around the center weight (triggered by collision with tubes),
  • (e) accelerometer chips mounted on the tubes.

Testing

• Sensors tested
  • piezo,
  • tilt-switch,
  • copper strips (connecting with center weight)
• Sensors NOT tested (more expensive)
  • piezo strip with weight,
  • accelerometer chip