Arduino #16 - Light Harp

This project posed a challenge for several years because the audio amplifier referenced in the project had been discontinued. In the Summer of '17, Matthew Clark found a suitable replacement and produced the device on displayed in the Fab Lab. You are officially a pioneer with your attempt to find and document the correct audio amplifier and produce your own Peter Frampton Wah-Wah machine (a wave of your hands affects the Light-Dependent Resistors, with one hand changing volume, and the other hand changing pitch).

• Light Harp - (Monk Project #20 - pp 110-120)

The part we have ordered to replace the discontinued part (Philips TDA7052) is Texas Instruments LM386. Note, the LM386 has a different wiring schematic and pin arrangement than the old part on which the Monk Project Schematic was developed. You will need to study the LM386 Data Sheet and modify the schematic to make it work.

After you get the Ligth Harp working, modify the schematic and add an on/off switch to turn the device on (and off) since it can be somewhat annoying to be left on indefinitely. Matthew Clark used a pushbutton to change frequency (unable to hear the sound at high frequency), but there is still background hissing on Matthew's device.

Create a single post for this project on your student web pages. Reflect on how many and what kind of debug errors you had (hardware, schematic, sketch/software, or reading/understanding the assignment). Include a photo of your hardware and one 20-30 second video your light harp in action. Be sure to document what part you used to replace the audio amplifier specified in the Simon Monk project.