2 layers80 × 40 mm Knobs, the printed circuit board in 3D

Knobs

A modular magnetic macro pad

Size: 80 × 40 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 10
Nets: 16
Pads: 64
Tracks, vias: 99, 12
Pours: 1
Routed: Yes
KiCad: KiCad 9.0 (file 20241229)
Created: 9 Jun 2025
Updated: 7 Sep 2025

Overview

Knobs is an open-source printed circuit board by Choccy-vr, from the Choccy-vr/BeanPad repository on GitHub. It is a 2-layer board of 80 × 40 mm with 10 parts on 16 nets, routed with 99 tracks and 12 vias.

Its parts include 4 connectors, 2 switches and 1 IC. It belongs with the keyboards and input boards and the RP2040 boards of this library.

README

README.md

BeanPad

A modular magnetic macro pad. Use many different modules to make the macro pad of your dreams. Modify the macros.json for a custom keymap.

I built this originally as a buffer for my main project but it has since taken over it. The idea came from other snap-fit modular systems and thought it was cool. I originally was just going to make a hack pad but it quickly grew into this. I also built this in case my other project doesn't get finished in time for undercity.

Images

PCB

Screenshot 2025-06-09 151724.png

Case

Screenshot 2025-06-16 152040.png

Firmware (Really nothing to see here)

Item:	Quanity: (If Items come in sets amount of sets)	Source:	Cost:	Total
Screws	1(50pcs)	https://www.aliexpress.us/item/3256802339245383.html?spm=a2g0o.cart.0.0.7a1938daQ49wN7&mp=1&pdp_npi=5%40dis%21USD%21USD%201.46%21USD%201.41%21%21USD%201.41%21%21%21%402103273e17501073692076879ef915%2112000021000038128%21ct%21US%213108417632%21%211%210&_gl=1ga8tl1_gcl_auNDM2NDExMDYwLjE3NDk1NzAxOTM._gaNzg5NDk5ODkzLjE3NTAxMDU1ODU._ga_VED1YSGNC7*czE3NTAxMDU1ODQkbzEkZzEkdDE3NTAxMDczNzAkajUxJGwwJGgw&gatewayAdapt=glo2usa	$1.50
Heat Set Inserts	1(50pcs)	https://www.aliexpress.us/item/3256807466816961.html?spm=a2g0o.cart.0.0.7a1938daQ49wN7&mp=1&pdp_npi=5%40dis%21USD%21USD%202.02%21USD%201.93%21%21USD%201.93%21%21%21%402103273e17501073692076879ef915%2112000041667111488%21ct%21US%213108417632%21%211%210&_gl=1ga8tl1_gcl_auNDM2NDExMDYwLjE3NDk1NzAxOTM._gaNzg5NDk5ODkzLjE3NTAxMDU1ODU._ga_VED1YSGNC7*czE3NTAxMDU1ODQkbzEkZzEkdDE3NTAxMDczNzAkajUxJGwwJGgw&gatewayAdapt=glo2usa	$2
Diodes	1(100pcs)	https://www.aliexpress.us/item/2255799955957794.html?spm=a2g0o.cart.0.0.7a1938daQ49wN7&mp=1&pdp_npi=5%40dis%21USD%21USD%201.42%21USD%201.42%21%21USD%201.39%21%21%21%402103273e17501073692076879ef915%2110000000428321629%21ct%21US%213108417632%21%211%210&_gl=1ga8tl1_gcl_auNDM2NDExMDYwLjE3NDk1NzAxOTM._gaNzg5NDk5ODkzLjE3NTAxMDU1ODU._ga_VED1YSGNC7*czE3NTAxMDU1ODQkbzEkZzEkdDE3NTAxMDczNzAkajUxJGwwJGgw&gatewayAdapt=glo2usa	$1
Cherry MX Switches	1(30pcs)	https://www.aliexpress.us/item/3256806069646359.html?spm=a2g0o.cart.0.0.7a1938daQ49wN7&mp=1&pdp_npi=5%40dis%21USD%21USD%2019.50%21USD%2018.55%21%21USD%2018.55%21%21%21%402103273e17501073692076879ef915%2112000036489552474%21ct%21US%213108417632%21%211%210&_gl=1xvozit_gcl_auNDM2NDExMDYwLjE3NDk1NzAxOTM._gaNzg5NDk5ODkzLjE3NTAxMDU1ODU._ga_VED1YSGNC7*czE3NTAxMDU1ODQkbzEkZzEkdDE3NTAxMDczNzckajQ0JGwwJGgw&gatewayAdapt=glo2usa	$19
Rotary Encoders	2	https://www.aliexpress.us/item/3256805010555504.html?spm=a2g0o.cart.0.0.7a1938daQ49wN7&mp=1&pdp_npi=5%40dis%21USD%21USD%201.59%21USD%201.57%21%21USD%201.57%21%21%21%402103273e17501073692076879ef915%2112000032095591035%21ct%21US%213108417632%21%212%210&_gl=1b3zsk7_gcl_auNDM2NDExMDYwLjE3NDk1NzAxOTM._gaNzg5NDk5ODkzLjE3NTAxMDU1ODU._ga_VED1YSGNC7*czE3NTAxMDU1ODQkbzEkZzEkdDE3NTAxMDczNzgkajQzJGwwJGgw&gatewayAdapt=glo2usa	$3
KeyCaps	2(24pcs)	https://www.aliexpress.us/item/3256802719703092.html?spm=a2g0o.cart.0.0.7a1938daQ49wN7&mp=1&pdp_npi=5%40dis%21USD%21USD%204.15%21USD%203.86%21%21USD%203.62%21%21%21%402103273e17501073692076879ef915%2112000025975791590%21ct%21US%213108417632%21%212%210&_gl=1b3zsk7_gcl_auNDM2NDExMDYwLjE3NDk1NzAxOTM._gaNzg5NDk5ODkzLjE3NTAxMDU1ODU._ga_VED1YSGNC7*czE3NTAxMDU1ODQkbzEkZzEkdDE3NTAxMDczNzgkajQzJGwwJGgw&gatewayAdapt=glo2usa	$7
Pogo Connectors	3(9 pairs)	https://www.aliexpress.us/item/3256806345459324.html?spm=a2g0o.detail.0.0.9f08fUkJfUkJyL&mp=1&pdp_npi=5%40dis%21USD%21USD%206.80%21USD%206.80%21%21USD%206.80%21%21%21%402103273e17501073828027372ef915%2112000045728213793%21ct%21US%213108417632%21%213%210&_gl=11iabbhw_gcl_auNDM2NDExMDYwLjE3NDk1NzAxOTM._gaNzg5NDk5ODkzLjE3NTAxMDU1ODU._ga_VED1YSGNC7*czE3NTAxMDU1ODQkbzEkZzEkdDE3NTAxMDc3MDAkajE2JGwwJGgw&gatewayAdapt=glo2usa	$21
Soldering Iron	1	https://www.aliexpress.us/item/3256806823950124.html?spm=a2g0o.cart.0.0.7a1938daQ49wN7&mp=1&pdp_npi=5%40dis%21USD%21USD%2019.24%21USD%207.89%21%21USD%207.89%21%21%21%402103273e17501073692076879ef915%2112000039050811400%21ct%21US%213108417632%21%211%210&_gl=1y42j40_gcl_auNDM2NDExMDYwLjE3NDk1NzAxOTM._gaNzg5NDk5ODkzLjE3NTAxMDU1ODU._ga_VED1YSGNC7*czE3NTAxMDU1ODQkbzEkZzEkdDE3NTAxMDczODEkajQwJGwwJGgw&gatewayAdapt=glo2usa	$8
XIAO Rp2040s	2 (6pcs)	https://www.seeedstudio.com/Seeed-Studio-XIAO-RP2040-3PCS-p-5942.html	$27
PCBs	4	https://www.pcbway.com/	$47.84
Total				$148.23 (Includes Shipping and Taxes)

Parts

Qty	Value	Footprint	References
4	Male_Pogo_Connector_01x05	Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical	J1, J2, J3, J4
2	RotaryEncoder_Switch	Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm	SW1, SW2
1	LOGO	LOGO	G***
1	XIAO-RP2040-DIP	Module:XIAO-RP2040-DIP	U1

The 8 most common of 10 parts.

Questions

How big is the Knobs PCB?

It measures 80 × 40 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Knobs use?

10 parts. 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 Knobs KiCad files?

From the Choccy-vr/BeanPad repository on GitHub, at the commit this page was made from: the board is PCBs/Knobs/Knobs.kicad_pcb and its schematic PCBs/Base/BeanPad.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Knobs design in my own project?

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

Category and platform

Keyboards and input RP2040

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/choccy-vr-beanpad-knobs" title="Knobs in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/choccy-vr-beanpad-knobs.jpg" alt="Knobs" width="1200" height="900">

A picture that opens the board, for a README

[![Knobs](https://pcbkit.io/embed/boards/choccy-vr-beanpad-knobs.jpg?size=s)](https://pcbkit.io/boards/choccy-vr-beanpad-knobs)

Source

Repository: Choccy-vr/BeanPad
Board file: PCBs/Knobs/Knobs.kicad_pcb
Commit: 2569024
Licence: Not stated

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