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Make: Projects

Parallax Ping))) Theremin

This guide will show you how to make a simple distance theremin/ruler with the Arduino.

Parallax Ping))) Theremin

This guide will cover the basic concept of the Ping))) sensor by making a fun project.



Step #1: Wire LCD backlight/logic circuits

Parallax Ping))) Theremin
  • Wire backlight according to pins on LCD. Same for logic circuits. Pot wiper goes to Vo (contrast), one outer pin of the pot goes to ground, the other to 5v.
  • Make sure polarities are correct.
  • Use pot to control contrast to your needs.

Step #2: Wire the digital pins

Parallax Ping))) Theremin
  • * LCD RS pin to digital pin 12 * LCD Enable pin to digital pin 11 * LCD D4 pin to digital pin 5 * LCD D5 pin to digital pin 4 * LCD D6 pin to digital pin 3 * LCD D7 pin to digital pin 2 * LCD R/W to ground
  • I used a 1K resistor instead of a 10K pot.
  • Use the 10K pot to control the contrast.

Step #3: Wire Ping))) and audio

Parallax Ping))) Theremin

Sound is on pin 10 and ping is on pin 7. 1kΩ resistor on headphone ground.

Step #4: Upload code

Parallax Ping))) Theremin
  • Code can be found here.
  • Copy and paste code to Arduino IDE and click "Upload".

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