HardLabs

Mito

KOEGlike·mito-pcb

Mito PCB layout, top view — open source Nordic nRF board by KOEGlike

About the Mito PCB

Mito is an open source Nordic nRF PCB design by KOEGlike, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 228 × 84.3 mm, with 260 components from 36 distinct parts.

Its main chip is the nRF52833_QDxx, from the Nordic nRF family. Other key parts include the USBLC6-2SC6, TXB0101DCK and BQ24075RGT. By type, the board carries 82 diodes, 80 capacitors, 46 switches, 26 resistors, 8 ICs and 4 transistors.

It belongs with the keyboards and iot & wireless designs in this gallery.

From the project

the pcb of a wireless, split, low-profile, hot-swap, mechanical keyboard with RGB, based on the nrf52833 SOC

Much thanks to pcbway for sponsoring this project, the video is in the making, stay tuned! The PCBs and stencil are very high quality!!

Mito, from the project README
From the project README

Main components on the Mito

USBLC6-2SC6nRF52833_QDxxTXB0101DCKBQ24075RGT

Mito bill of materials (BOM)

260 components, 36 distinct parts.

QtyPartRefs
2
USBLC6-2SC6
U2, U5
2
nRF52833_QDxx
U7, U8
2
TXB0101DCK
U9, U10
2
BQ24075RGT
U11, U12
2
AO3401A
Q5, Q6
2
2N7002
Q7, Q8
2
32MHz
Y1, Y2
2
32.768 kHz
Y3, Y4
2
USB_C_Receptacle_USB2.0_16P
J3, J6
2
Antenna_Chip
AE65, AE66
2
500mA
F1, F2
2
Reset Button
SW1, SW24
2
SW_On_Off
SW2, SW25
42
SW_Push
SW3, SW4, SW5, SW6, SW7, SW8, SW9, SW10 +34
42
1N5819
D2, D3, D4, D5, D6, D7, D8, D9 +34
40
SK6812MINI-E
D23, D24, D25, D26, D27, D28, D29, D30 +32
2
4.7nH
L4, L9
2
2.2nH
L5, L10
48
100nF
C2, C4, C18, C20, C41, C42, C43, C44 +40
2
100pF
C5, C21
Show 16 more
QtyPartRefs
2
820pF
C6, C22
4
1uF
C7, C23, C39, C40
8
4.7uF
C9, C25, C87, C88, C89, C90, C91, C92
4
4.7uF
C10, C19, C24, C26
8
12pF
C11, C12, C15, C16, C27, C28, C31, C32
2
1pF
C13, C29
2
1.2pF
C14, C30
2
100K
R1, R8
2
806k
R2, R9
2
2M
R3, R10
4
5.1k
R4, R5, R11, R12
2
100R
R6, R7
8
10k
R13, R14, R16, R18, R20, R22, R33, R34
2
3.9k
R27, R28
2
1.5k
R29, R30
2
4.7k
R31, R32

Mito design files

The KiCad project lives in the KOEGlike/mito-pcb repository on GitHub; these links point at the commit this page was built from.

Mito: common questions

What microcontroller does the Mito use?

The Mito is built around the nRF52833_QDxx, from the Nordic nRF family.

How big is the Mito PCB?

The Mito measures 228 × 84.3 mm, has 4 copper layers and is 1.6062 mm thick.

How many components are on the Mito?

260 components, from 36 distinct parts. The full bill of materials is listed on this page.

Where can I download the Mito design files?

From the KOEGlike/mito-pcb repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Mito design in my own project?

Yes, under the terms of its GPL-3.0 license, which KOEGlike chose for the repository.

Can I test firmware for the Mito without the hardware?

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

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