2 layers87.6 × 100.8 mm
EtherKraken
karmakrafts/EtherKraken
A RP3A0 SiP based controller with 34 programmable IOs, Cortex M0 co-processor, 2MB of flash, SPI, I²C, UART and 100Base-T connectivity.
84 parts3Apache-2.0
2 layers66.7 × 88.1 mm
BetterNat
mihranrazaa/KnobbleA modern design for not so common radios
- Size
- 66.7 × 88.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 7
- Nets
- 51
- Pads
- 83
- Tracks, vias
- 119, 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 12 Jun 2025
- Updated
- 15 Jul 2025
Overview
BetterNat is an open-source printed circuit board by mihranrazaa, from the mihranrazaa/Knobble repository on GitHub, published under the MIT licence. It is a 2-layer board of 66.7 × 88.1 mm with 7 parts on 51 nets, routed with 119 tracks and 1 via.
It is built around the RASPBERRY PI ZERO 2 W. Its parts include 3 switches and 2 ICs. It belongs with the radio and wireless boards and the Raspberry Pi (Linux) boards of this library.
Main components
1README
README.mdKnobble
A modern design for not so common radios.
Overview
Knobble is a Rasberry pi based portable Radio scanning system design for real time monitoring and interacting with different radio frequncies via an RTL-SDR dongle. It can help you to listen through FM, aviation, emergency, amateur, and public service frequencies.
Features
- Runs on Rasberry PI zero 2 W.
- Multi-band scanning across FM, aviation, emergency, amateur, and police frequencies
- Preset system with multiple frequency banks and persistent storage.
- Automatic and manual scan modes
- Better shutdown process
- Oled Display for sharing all the relevant live info.
- and a cool CAD Design for emotional support lol.
Controls
| Control | Action |
|---|---|
| Rotate Encoder | Adjust volume or frequency |
| Encoder Button (tap) | Start/stop scanning |
| Encoder Button (hold) | Toggle mute/unmute |
| Switch 1 | Cycle through preset banks |
| Switch 2 | Toggle scan mode (Manual / Auto / Preset) |
| Switch 3 | Change radio service type (FM, Aviation, etc.) |
Files to build
PCB
The files for the PCB and Schematics are available in the PCB folder and gerber files are added in the Production folder..
3D Case (CAD)
The step files for the keyboard are available in the CAD folder and also in the Production Folder.
BASE
TOP
Combined Images
Can't add a combine image of pcb with components my laptop can't handle all that together.. Other than this you just have to purchase the Components given in the BOM and solder and assemble them.
BOM
| Component | Quantity | Note | Price | Link |
|---|---|---|---|---|
| Rasberry pi zero 2 w | 1 | Controlling UNIT | 16USD | Available |
| RTL-SDR | 1 | most important for the project.. | 51USD | Available |
| 1.3 inch oled display | 1 | It has 2 extra Stabilizers just in case.. | 12USD | Available |
| macro switches | 3 | user input they are 50 pcs the link i have provided | 0.9USD | Available |
| Rotary encoder | 1 | User input | 0.9USD | Available |
| PCM5102A DAC | 1 | For connecting external speaker, headphones, etc | 26USD | Available |
| UPS Hat | 1 | For portability | 26USD | Available |
| PCB | ** | JLCPCB ftw | - | |
| CAD | ** | Legion ftw | - | |
| Total | 135-145USD |
I know it going above 150USD so i'm ready to pay the remaining cost...
Next Update
- I want to add offline music listening...
Extra Stuff
Gratitude
- Thanks to Hackclub and Hackpad for making me do this brilliant project, More coming :).
- Thanks to my potato for helping me till the end.
- Thanks to myself for completing the project and not getting distracted with another project.
- And Thank you for Reading?
Inspiration
Going to Undercity!! and i always wanted to build thiss project becuase RF always makes me curious it is like another invisible world which we can only access through speacial gears feels Magical...
Challanging
Building the custom case.. i don't have the words to express my pain...
End
Check my BLOG ~ mihranrazaa(If you are reading this please review HappyUSB too ToT )
BYEEE
Parts
7| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 1825910-6 | Switch:SW_1825910-6-43D | SW2, SW3, SW4 |
| 1 | KY-040 | Ky0:KY-040-PORT3D | U1 |
| 1 | OLED_128X64_1.3_I2C | Oled:LCD_OLED_128X64_1.3_I2C3D | DS1 |
| 1 | RASPBERRY_PI_ZERO_2_W | 2w:MODULE_RASPBERRY_PI_ZERO_2_W3d | U2 |
| 1 | ~ | dac:PCM5102A-AMZN-BOARD | 1 |
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Questions
How big is the BetterNat PCB?
It measures 66.7 × 88.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the BetterNat use?
7 parts, built around the RASPBERRY PI ZERO 2 W. 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 BetterNat KiCad files?
From the mihranrazaa/Knobble repository on GitHub, at the commit this page was made from: the board is PCB/BetterNat.kicad_pcb and its schematic PCB/BetterNat.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the BetterNat design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).