HardLabs

Ashiyu (tomtho slim mk2)

lou12de39r·ashiyu

Ashiyu (tomtho slim mk2) PCB layout, top view — open source Nordic nRF board by lou12de39r

About the Ashiyu (tomtho slim mk2) PCB

Ashiyu (tomtho slim mk2) is an open source Nordic nRF PCB design by lou12de39r, published on GitHub. It is a 2-layer board measuring 275.8 × 106.3 mm, with 164 components from 21 distinct parts.

Its main chip is the MDBT50Q-1MV2, from the Nordic nRF family. Other key parts include the USBLC6-2SC6 and MCP73831T-2ACI/OT. By type, the board carries 67 switches, 66 diodes, 12 resistors, 7 capacitors, 5 LEDs and 3 ICs.

It belongs with the keyboards designs in this gallery.

From the project

Ashiyu（足湯） — tomtho-slim mk2 の愛称。Designed by tommys079. Inspired by ClickBoard by Salicylic_acid3（自作キーボード温泉街）. Keycap models are derived from ACC Keycaps (CC BY-NC 4.0).

Ashiyu（足湯） — tomtho-slim mk2 の愛称。Designed by tommys079. Inspired by ClickBoard by Salicylic_acid3（自作キーボード温泉街）. Keycap models are derived from ACC Keycaps (CC BY-NC 4.0).

This repository holds the frozen layout and the board plan for the second keyboard: roBa-style column stagger, centre trackpad, thin case.

Charger STAT is not wired to the MCU: the MCP73831 drives STAT up to VBUS (5 V) when charging is done, which would overdrive an nRF GPIO. Firmware can see USB power from the nRF's own VBUS detection instead.

Main components on the Ashiyu (tomtho slim mk2)

MDBT50Q-1MV2USBLC6-2SC6MCP73831T-2ACI/OT

Ashiyu (tomtho slim mk2) bill of materials (BOM)

164 components, 21 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MDBT50Q-1MV2
U1
1
USBLC6-2SC6
U2
1
MCP73831T-2ACI/OT
MCP73831
U3
1
AO3401A
Q1
1
TYPE-C-31-M-12
USB-C
J1
1
SM02B-SRSS-TB(LF)(SN)
BATTERY
J2
1
HC-FPC-05-10-6RLTAG
TRACKPAD
J3
65
SKRAAWE010
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +57
1
TS-1928-B
RESET
SW66
1
PCM12SMTR
POWER
SW67
1
KT-0603R
RED
LED1
4
XL-2012SURSYGC
LED2, LED3, LED4, LED5
65
1N4148W
D1, D2, D3, D4, D5, D6, D7, D8 +57
1
B5819W SL
B5819W
D66
4
CL10A475KO8NNNC
4.7uF
C1, C4, C6, C7
1
CL10A106KP8NNNC
10uF
C2
2
CC0603KRX7R9BB104
100nF
C3, C5
2
0603WAF5101T5E
5.1k
R1, R2
3
0603WAF4701T5E
4.7k
R3, R11, R12
6
0603WAF1001T5E
1k
R4, R6, R7, R8, R9, R10
Show 1 more
QtyPartRefs
1
0603WAF1003T5E
100k
R5

Ashiyu (tomtho slim mk2) design files

The KiCad project lives in the lou12de39r/ashiyu repository on GitHub; these links point at the commit this page was built from.

Ashiyu (tomtho slim mk2): common questions

What microcontroller does the Ashiyu (tomtho slim mk2) use?

The Ashiyu (tomtho slim mk2) is built around the MDBT50Q-1MV2, from the Nordic nRF family.

How big is the Ashiyu (tomtho slim mk2) PCB?

The Ashiyu (tomtho slim mk2) measures 275.8 × 106.3 mm, has 2 copper layers and is 1.2 mm thick.

How many components are on the Ashiyu (tomtho slim mk2)?

164 components, from 21 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 Ashiyu (tomtho slim mk2) design files?

From the lou12de39r/ashiyu 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 Ashiyu (tomtho slim mk2) design in my own project?

The repository has no license, so all rights stay with lou12de39r. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Ashiyu (tomtho slim mk2) 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.

More boards in ashiyu

Similar boards