Laser Harp with Tah and Raspberry-Pi

This valentines we made this wooden Harp and used Laser and Light Dependent Resistors (LDR's) to play music. I will not be showing you how to make the wooden structure, but you can find the images with exact dimensions if you want to use them. I have used the code of Piano Stairs which I found in this instructable

Laser Harp with Tah and Raspberry-Pi

Here is the list of items that you will require

1. Wooden structure of the harp

2. 12 – 3mm red/green laser dots

3. 5V power supply for the Laser

4. A Tah board (you can use any Arduino as well)

5. 12 – LDR and 12 -1K Resistors

6. A Raspberry Pi

7. Set of speakers

8. Play Dough (yay!!!)

9. Tools – soldering gun, scissors, wires, Tape, Glue gun, and prototyping circuit board.

Step 1: Now go make your Harp

Use can use the above drawing to create your own harp

Step 2: Getting the circuits ready

To understand how LDRs work follow this Adafruit tutorial. Connect 6 LDR's with a 1K pull down resistor to one Tah board and 6 1K resistors to another Tah. On one side use the connector from the 5V adaptor to power up the lasers. Connect the lasers in series and stick them using play dough in the upper cavity in the harp.

Laser Harp with Tah and Raspberry-Pi

Step 3: Align lasers and Place LDRs

Along the slit in the central cavity align the lasers and place the LDR's appropriately. Use the 6 analog pins of the Tah as the input from the LDR's

The following sketch can be uploaded to the Tah boards and you are good to go here.


For more detail: Laser Harp with Tah and Raspberry-Pi

About The Author

Ibrar Ayyub

I am an experienced technical writer with a Master's degree in computer science from BZU Multan University. I have written for various industries, mainly home automation, and engineering. I have a clear and simple writing style and am skilled in using infographics and diagrams. I am a great researcher and is able to present information in a well-organized and logical manner.

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