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4 layers30.9 × 66 mmTiny4FSK, the printed circuit board in 3D

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

Size
30.9 × 66 mm
Copper layers
4
Thickness
1.6 mm
Parts
74
Nets
90
Pads
331
Tracks, vias
611, 341
Pours
11
Routed
Yes
KiCad
KiCad 8.0 (file 20240108)
Created
30 Apr 2023
Updated
31 May 2025

Overview

Tiny4FSK is an open-source printed circuit board by hackclub, from the hackclub/OnBoard repository on GitHub. It is a 4-layer board of 30.9 × 66 mm with 74 parts on 90 nets, routed with 611 tracks and 341 vias.

It is built around the ATSAMD21G18A-AU, BME280 and TPS61200DRC, with the MAX-M10S among its other parts. Its parts include 26 capacitors, 12 resistors, 7 inductors, 6 ICs and 6 connectors. It belongs with the SAM D and SAM boards of this library.

Main components

4

README

README.md

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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

74
QtyValueFootprintReferences
7100nFCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC6, C11, C13, C14, C15, C21, C22
61uFCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC1, C3, C4, C5, C10, C19
310kResistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolderR1, R2, R12
21.8kResistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolderR8, R10
2100Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolderR3, R4
2100 nF (J1)Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC2, C7
210uFCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC8, C9
233 nHInductor_SMD:L_0402_1005Metric_Pad0.77x0.64mm_HandSolderL1, L7
25k1Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolderR5, R6
1
110 nFCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC23
110 pFCapacitor_SMD:C_0201_0603Metric_Pad0.64x0.40mm_HandSolderC24
1100 pFCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC18
1100nFCapacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolderC26
112 pFCapacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolderC17
115 pFCapacitor_SMD:C_0201_0603Metric_Pad0.64x0.40mm_HandSolderC20
11MResistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolderR9
12.2uHIND_CONT:LPS3015222MRBL3
122 nHInductor_SMD:L_0402_1005Metric_Pad0.77x0.64mm_HandSolderL6
1220Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolderR7
1220 nHInductor_SMD:L_0603_1608Metric_Pad1.05x0.95mm_HandSolderL2
122uFCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC16
130 nHInductor_SMD:L_0402_1005Metric_Pad0.77x0.64mm_HandSolderL4
136 nHInductor_SMD:L_0402_1005Metric_Pad0.77x0.64mm_HandSolderL5
14.5 nFCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC12
156kResistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolderR11
19.1 pFCapacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolderC25
1AAABatteryExtended:BAT_BK-82BT1
1ANTAntenna:Antenna_WhipAE2
1ATSAMD21G18A-APackage_QFP:TQFP-48_7x7mm_P0.5mmU5
1BATT PWRSlideSwitch:WS-SLSU_6p7x2p7_WRESW2
1BLM18AG121SN1D (J1)Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderFB1
1BME280Package_LGA:Bosch_LGA-8_2.5x2.5mm_P0.65mm_ClockwisePinNumberingU1
1ErrorLED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolderD2
1GPS ANTAnt:GPS1003AE1
1I2CConnector_PinHeader_1.00mm:PinHeader_1x04_P1.00mm_VerticalJ2
1JTAGConnector_PinHeader_1.00mm:PinHeader_1x10_P1.00mm_VerticalJ6
1Linear Step-DownPackage_TO_SOT_SMD:SOT-89-3_HandsolderingU2
1MAX-M10SRF_GPS:ublox_MAXU3
1PWR BattConnector_PinHeader_1.00mm:PinHeader_1x02_P1.00mm_VerticalJ1
1PWR SupplyConnector_PinHeader_1.00mm:PinHeader_1x02_P1.00mm_VerticalJ4
1RSTButton_Switch_SMD:SW_Tactile_SPST_NO_Straight_CK_PTS636Sx25SMTRLFSSW1
1SI4063Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm_ThermalViasIC1
1SOURCEJumper:SolderJumper-3_P1.3mm_Open_Pad1.0x1.5mmJP2
1SPIConnector_PinHeader_1.00mm:PinHeader_1x05_P1.00mm_VerticalJ5
1SWITCH_ENJumper:SolderJumper-2_P1.3mm_Open_Pad1.0x1.5mmJP1
1SuccessLED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolderD1
1TCXO MCUTCXO:BGA4_SiT1532_SITXTAL1
1TPS61200DRCPackage_SON:Texas_S-PVSON-N10_ThermalViasU4
1USBCConnector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_HorizontalJ3
1~OSC:OSC_ECS-TXO-32CSMV-260-AN-TRXTAL2

The 70 most common of 74 parts.

Questions

How big is the Tiny4FSK PCB?

It measures 30.9 × 66 mm and has 4 copper layers, 1.6 mm thick.

What parts does the Tiny4FSK use?

74 parts, built around the ATSAMD21G18A-AU, BME280, TPS61200DRC and MAX-M10S. 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 Tiny4FSK KiCad files?

From the hackclub/OnBoard repository on GitHub, at the commit this page was made from: the board is projects/Tiny4FSK/src/Tiny4FSK.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Tiny4FSK design in my own project?

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

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