Add DAC PCB

[whatwareweb]

Submission Checklist:

• I am a current high school, middle school, or home schooled student.

  • I am 18 or under
  • I have filled out the verification form

• I have joined the #electronics channel on Slack

• I made this board from scratch, even if I followed a tutorial

• I have followed the directions in README.md

  • Created a folder under onboard/projects
  • Filled out TEMPLATE.md as README.md inside your project folder
  • Uploaded gerber.zip and schematic.pdf inside your project folder
  • Created a folder called src and uploaded design files
  • Uploaded screenshot of PCB order called cart.png with all costs included
  • I am ordering the smallest batch size (ie. JLCPCB's smallest order is for 5 boards)
  • If outside the US I've checked that I can afford the customs charges in my country (which isn't covered by the grant)

• (Optional) This project is from a tutorial¹.

• (Optional) This project is for the Trail.

• (Optional) I'm in a FIRST (FRC, FTC, FLL, etc.) team. The number is: ____

This is my USB DAC project.

Note: I have already recieved the OnBoard grant, this will be my 2nd PCB but it still fits in the budget.

USB DAC

This project uses the TI PCM2912A ic to act as a USB DAC that has a headphone jack output. It can output sound from the computer to a headphone jack. It should sound better than the onboard motherboard sound quality due to the use of high quality IC, capacitors, and power supply filtering. It has 16-bit 44.1KHz max audio quality, so nothing special, but I plan to use the experience I gained making this project to make further higher quality DACs.

For 3 boards from OSHpark it will cost $24.90 USD Dollars.

The main challenge was figuring out how to calculate a crystal load capacitance which I had never done before, but it is not that hard, so I was able to figure it out.

Footnotes

1. Projects from a tutorial are 100% fine! We just want to ask so we can count how people are using tutorials. ↩

[whatwareweb]

This is the GitHub repo for the project as well: https://github.com/whatwareweb/usb-dac

[prophetorpheus]

Hi, I'm Orpheus Leap! Here to help you review your PR.

Found multiple files named README.md. Please only provide one per PR. Make seperate PRs for multiple independent projects.
Happy OnBoarding!
_{This bot is a simpler helper for common submission types. If there's an error with this, please point it out and someone from the OnBoard team will look at it manually.}

[whatwareweb]

Hi, I'm Orpheus Leap! Here to help you review your PR.

Found multiple files named README.md. Please only provide one per PR. Make seperate PRs for multiple independent projects. Happy OnBoarding! This bot is a simpler helper for common submission types. If there's an error with this, please point it out and someone from the OnBoard team will look at it manually.

The Readme.md in the folder is a copy from the original github repo https://github.com/whatwareweb/usb-dac . If you do not want this please let me know so I can remove it from the PR

[LimesKey]

Thanks for your other submission, best of luck getting your PCB. Do you think you can also add upload a STEP and WRL 3d model of your PCB in KiCad, I'd love to see the 3d model of this.

[whatwareweb]

OK I will plan to do this tomorrow because for some reason none of the footprints are showing 3d models either.

[whatwareweb]

OK I have added the 3D model