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Lazer Harp |
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A laser harp is an instrument composed of a set of lasers and photoresistors. The beams of the lasers act like harp strings. When one of the beams is blocked (plucked) and the photoresistor senses a drop in incoming light intensity, an interrupt signals a monitoring micro controller to play a musical note corresponding to that string/beam.
My implementation uses an Arduino UNO, a piezo speaker, a potentiometer and 5 x (laser pointer + photoresistor + resistor).
For each laser pointer a combination of a photoresistor and a resistor create a voltage divider that turns light intensity into a corresponding voltage amplitude read by an input pin of the Arduino.
My implementation uses an Arduino UNO, a piezo speaker, a potentiometer and 5 x (laser pointer + photoresistor + resistor).
For each laser pointer a combination of a photoresistor and a resistor create a voltage divider that turns light intensity into a corresponding voltage amplitude read by an input pin of the Arduino.
