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2 layers44 × 88 mmBuer, the printed circuit board in 3D

💡 Join 1,000 teenagers and make your first PCB with a $100 grant!

Size
44 × 88 mm
Copper layers
2
Thickness
1.6 mm
Parts
36
Nets
50
Pads
170
Tracks, vias
369, 28
Pours
1
Routed
Yes
KiCad
KiCad 8.0 (file 20240108)
Created
30 Apr 2023
Updated
31 May 2025

Overview

Buer is an open-source printed circuit board by hackclub, from the hackclub/OnBoard repository on GitHub. It is a 2-layer board of 44 × 88 mm with 36 parts on 50 nets, routed with 369 tracks and 28 vias.

It is built around the ESP32-WROOM-32UE-N4. Its parts include 11 resistors, 9 capacitors, 5 switches, 4 connectors and 2 ICs. It belongs with the ESP32 boards of this library.

Main components

1

README

README.md

Hop Onboard banner logo

Onboard has ended now :/
But much more to come! Stay tuned :). Sign up here.

OnBoard - Get a $100 grant and make a PCB!

"I’m so glad that young people can create things like PC boards online. May your creativity have no limits!”

– Steve Wozniak, Apple co-founder endorsing Hack Club OnBoard

It's easier than ever for high school students to get involved with programming; all you need is a computing device and internet access. Yet, it's not the same for hardware. While PCB fabs have greatly increased the accessibility for professionally done boards, there is still no clear way for high school students to jump in. This is where OnBoard comes in.


Every student will receive up to $100 to cover PCB manufacturing costs, and join a community of peers– some more beginner and some more experienced.

Requirements

Every design/submission needs to meet the following constraints to be approved:

  • Unique and open-source design
  • Must be orderable on JLCPCB or other approved vendor
  • Must be in high school or younger123 and show proof of school enrollment to submit

Getting Started

You can also go through a video with instructions on how to submit your grant!

Star the repo (Optional)

To follow the repo for updates and show you're participating, click the "star" button on the onboard repo.

Star the OnBoard repo

1. Join #electronics on Slack!

Our #electronics channel4 is where the party is getting started! If you haven't already joined, make sure to add yourself to the channel. And for those who are new to the Hack Club slack, sign up to our community of 13k+ makers through here (don't worry, there isn't an application).

Perhaps ping a little hello to @Kevin Yang?

2. Design a Board!

It's design time! If you've done this before, you can skip ahead to step 3. Most people reading this will be new to PCB design, so we've made a simple tutorial on making an example board.

Check out our PCB tutorials, where you'll make a design from scratch in a free online editor. This is jumping in the deep end- it won't explain everything, but it will give you a taste of what's possible. By the end you probably won't understand what you did or why you did it, but you will have a working design for a board and you'll know how to tweak and edit the design to make it your own.

If you get stuck on these tutorials, or want more example projects to learn from, post in the Slack channel to hear from others going on their journeys.

3. Upload to a Vendor and Take a Screenshot

Upload your Gerber files to JLCPCB.com and add them to your cart. JLCPCB is the default PCB manufacturer, but you can shop around 5 if there's a specific one you want to use 6. Ensure you complete the checkout process by entering your address and selecting a shipping method. Once completed, take a screenshot with all the final costs and shipping!

If you're curious what all the settings are about or how to order for assembly, check out our ordering_from_JLCPCB.md doc! To avoid excess shipping fees or customs, check out the Shipping Tips doc!

It should look like this:

Note: Your screenshot is VITAL since your project cannot be approved without it. You'll include the screenshot in your PR later.

4. Fork!

Fork the onboard repo! This is the where you'll add your project files and eventually PR from!

Fork the OnBoard repo

5. Add Your Design to Your Project Repo

From your fork of OnBoard, create a folder with your project name under OnBoard/projects. To do this, go to the projects folder and click Create new file.

Projects folder

Create new file

Then in the box labeled name your file..., type in PROJECT_NAME/README.md. This creates a README file under a folder called named after your project.

Creating a folder

After this, copy and paste the contents of TEMPLATE.md into the text editor and fill it out!

Paste in TEMPLATE.md

Once your done, press the big green Commit changes button to save!

With your README filled out, head over to add files to begin uploading your Gerber, design files, and screen shot of vendor approval.

Upload gerber files

In all, you should have the following files under your project folder:

  • README.md: A filled out TEMPLATE.md, renamed to README.md

  • cart.png: A screenshot of your order details

  • gerber.zip: This should be the file that you send off to the vendor.

  • schematic.pdf: Export the schematic from your EDA program as a PDF.

    • Go to "File > Export > PDF" in EasyEDA's Schematic tab for this.
  • src/: Make a folder called src and Whatever format your designer outputs should be included.

    • For EasyEDA STD, you need to File > Export > EasyEDA two JSON files - one from the schematic tab and one from the PCB tab.
      • Optionally, for EasyEDA STD, export a 3D Model as .obj as save it to the /src folder

    Export schematic.json in EasyEDA

    • For KiCad, read the Submitting for KiCad, add the .kicad_pcb, .kicad_sch and .kicad_pro files to your /src folder.
    • Or design.json, design.sch, design.brd, etc for other PCB Editors.

Ensure your file names are exactly the same as above.

Your PR should have a structure like this:

EasyEDA STDKiCad
EasyEDA Project ExampleKiCad Project Example

If you have all the above, you're done with this step!

6. Create a PR!

Once you've uploaded your files, you can merge them to the main repo through a pull request! Under the contribute tab of your forked repo, click the big green Open pull request.

Open a PR

That will bring you to the main repo, where you'll initiate a pull request. Follow the checklist, we'll then review your PR and you'll be off to the races!

Submission checklist

7. Get approval and order your board!

Once you submit your PR, it needs two approvals:

  • One verifying your high school enrollment documents, from HCB.
  • Another one from the engineering team, checking that your design follows the grant requirements.

These reviews typically take 24-48 business hours, and if everything is correct, we'll merge your pull request!

After your pull request gets merged, it can take up to 24 business hours for you to receive an email from HCB with a virtual credit card. Make sure to check your spam folder. Then, you can order your board!

8. Ship it!

Post photos of your board in #electronics! We can't wait to see what you make!

John sharing PCB

Example Projects

Footnotes

  1. Home school still counts! ↩

  2. If you left high school early you can also submit. ↩

  3. If you need help with ideas for proof of age, ask in our Slack and we'll help you out! here ↩

  4. This link only works after you've joined the slack. Make sure to get an invite here first. ↩

  5. Don't know which ones you can use? Check out VENDORS.md for more info! ↩

  6. If outside the US you may be charged customs which aren't covered by the grant! Check beforehand. ↩

Parts

36
QtyValueFootprintReferences
4RResistor_SMD:R_2512_6332MetricR5, R6, R7, R8
31kResistor_SMD:R_2512_6332MetricR9, R10, R11
31uFCapacitor_SMD:C_1812_4532MetricC1, C2, C4
210kResistor_SMD:R_2512_6332MetricR2, R3
210uFCapacitor_SMD:C_1812_4532MetricC3, C7
10.1uFCapacitor_SMD:C_1206_3216MetricC6
1100nFCapacitor_SMD:C_1812_4532MetricC8
12uFCapacitor_SMD:C_1812_4532MetricC5
1390KResistor_SMD:R_2512_6332MetricR4
14.7kResistor_SMD:R_2512_6332MetricR1
148uFCapacitor_SMD:C_1812_4532MetricC9
1AP62250WU-7Package_TO_SOT_SMD:TSOT-23-6U2
1CTRL21Button_Switch_SMD:SW_Tactile_SPST_NO_Straight_CK_PTS636Sx25SMTRLFSSW4
1CTRL22Button_Switch_SMD:SW_Tactile_SPST_NO_Straight_CK_PTS636Sx25SMTRLFSSW5
1Conn_01x02_PinTestPoint:TestPoint_2Pads_Pitch5.08mm_Drill1.3mmJ4
1Conn_01x30_SocketConnector_FFC-FPC:Hirose_FH12-30S-0.5SH_1x30-1MP_P0.50mm_HorizontalJ1
1DDiode_SMD:D_1206_3216MetricD1
1ESP32-WROOM-32UERF_Module:ESP32-WROOM-32UEU1
1GPIO ExposeConnector_JST:JST_PH_B6B-PH-K_1x06_P2.00mm_VerticalGPIO
1LInductor_SMD:L_2010_5025MetricL1
1SW_ENGButton_Switch_SMD:SW_Tactile_SPST_NO_Straight_CK_PTS636Sx25SMTRLFSSW1
1SW_PushButton_Switch_SMD:SW_Tactile_SPST_NO_Straight_CK_PTS636Sx25SMTRLFSSW3
1SW_RESETButton_Switch_SMD:SW_Tactile_SPST_NO_Straight_CK_PTS636Sx25SMTRLFSSW2
1header_IICConnector:NS-Tech_Grove_1x04_P2mm_VerticalJ3
1header_UARTConnector_JST:JST_EH_B4B-EH-A_1x04_P2.50mm_VerticalJ2

The 34 most common of 36 parts.

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Questions

How big is the Buer PCB?

It measures 44 × 88 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Buer use?

36 parts, built around the ESP32-WROOM-32UE-N4. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Buer KiCad files?

From the hackclub/OnBoard repository on GitHub, at the commit this page was made from: the board is projects/ESP32 Display Board/src/Buer.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Buer design in my own project?

Its repository states no licence, so its author keeps all rights: ask hackclub before reusing the design.