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Rii-518bt usb qmk

tangles-0·rii-518bt-usb-qmk-pcb·kicad/keyboard-usb.kicad_pcb

Rii-518bt usb qmk PCB layout, top view — open source STM32 board by tangles-0
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About the Rii-518bt usb qmk PCB

Rii-518bt usb qmk is an open source STM32 PCB design by tangles-0, published on GitHub. It is a 4-layer board measuring 102.5 × 53 mm, with 125 components from 19 distinct parts.

Its main chip is the STM32F072CBT6, from the STM32 family. Other key parts include the USBLC6-2SC6 and XC6206. By type, the board carries 22 diodes, 19 resistors, 11 capacitors, 3 ICs, 1 transistor and 1 fuse.

It belongs with the keyboards designs in this gallery.

From the project

USB replacement PCB for Rii 518bt keyboard

This repository contains everything needed to build a replacement PCB for the Rii 518BT keyboard, converting it from Bluetooth-only to USB with QMK firmware support.

- USB connectivity via STM32F072 microcontroller - 6-row × 12-column key matrix - Per-switch anti-ghosting diodes - Runs QMK Firmware - Backlight support with 7 brightness levels (Fn+Light) - Four user-controllable LEDs (Caps Lock enabled by default) - Drop-in replacement for the original PCB

Rii-518bt usb qmk, from the project README
From the project README

Main components on the Rii-518bt usb qmk

USBLC6-2SC6STM32F072CBT6XC6206

Rii-518bt usb qmk bill of materials (BOM)

125 components, 19 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
USBLC6-2SC6
U1
1
STM32F072CBT6
U2
1
XC6206
U3
1
IRLML6244
Q1
68
D
D_1, D_2, D_3, D_4, D_5, D_6, D_7, D_8 +60
1
500MA
500mA
F1
1
USER3
User3
D1
1
USER2
User2
D2
1
USER1
User1
D3
1
C883173
CAPS
D4
18
C883173
BACKL
D5, D6, D7, D8, D9, D10, D11, D12 +10
1
100NF
100nF
C1
2
1UF
1uF
C2, C3
4
CL05B104KB54PNC
100nF
C4, C5, C7, C10
2
CL05A475MP5NRNC
4.7uF
C6, C11
1
CL05B103KB5NNNC
10nF
C8
1
CL05A105KA5NQNC
1uF
C9
1
10K
10k
R1
18
30Ω
R2, R3, R4, R5, R6, R7, R8, R9 +10

Rii-518bt usb qmk design files

The KiCad project lives in the tangles-0/rii-518bt-usb-qmk-pcb repository on GitHub; these links point at the commit this page was built from.

Rii-518bt usb qmk: common questions

What microcontroller does the Rii-518bt usb qmk use?

The Rii-518bt usb qmk is built around the STM32F072CBT6, from the STM32 family.

How big is the Rii-518bt usb qmk PCB?

The Rii-518bt usb qmk measures 102.5 × 53 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Rii-518bt usb qmk?

125 components, from 19 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Rii-518bt usb qmk design files?

From the tangles-0/rii-518bt-usb-qmk-pcb repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Rii-518bt usb qmk design in my own project?

The repository has no license, so all rights stay with tangles-0. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Rii-518bt usb qmk without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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