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Umiko

idorurez·umiko

Umiko

About the Umiko PCB

Umiko is an open source RP2040/RP2350 PCB design by idorurez, published on GitHub. It is a board, with 414 components from 39 distinct parts.

Its main chip is the SC0914(13), from the RP2040/RP2350 family. Other key parts include the USBLC6-2P6, TLV75533PDQNR, W25Q128JVPIQ and SN74LVC1T45DRLR. By type, the board carries 127 capacitors, 89 LEDs, 36 resistors, 10 ICs, 6 diodes and 4 transistors.

It belongs with the keyboards and displays & leds designs in this gallery.

From the project

umiko (Japanese: 海 sea + 子 an affectionate diminutive) is a split, low-profile TKL F-row-less mechanical keyboard PCB. The split sits between your hands like the trough between two waves; typed at speed on Gateron KS-33 low-profile blues, the rolling clicks sound like waves break

umiko (Japanese: 海 sea + 子 an affectionate diminutive) is a split, low-profile TKL F-row-less mechanical keyboard PCB. The split sits between your hands like the trough between two waves; typed at speed on Gateron KS-33 low-profile blues, the rolling clicks sound like waves breaking on sand.

Split layout — two independent halves, each with its own MCU TKL, no F-row — full alpha + nav cluster on the right Per-key RGB — SK6812MINI-E reverse-mount, shines through PCB cutouts up into the keycap Underglow — SK6812MINI-E on the back of each PCB Gateron KS-33 v2.0 low-profile hot-swap switches…

Main components on the Umiko

USBLC6-2P6TLV75533PDQNRW25Q128JVPIQSC0914(13)SN74LVC1T45DRLR

Umiko bill of materials (BOM)

414 components, 39 distinct parts.

QtyPartRefs
2
USBLC6-2P6
U1, U9
2
TLV75533PDQNR
U2, U10
2
W25Q128JVPIQ
U3, U6
2
SC0914(13)
RP2040
U4, U7
2
SN74LVC1T45DRLR
74LVC1T45
U5, U8
4
2N7002VC
2N7002VC-
Q1, Q2, Q3, Q4
2
ECS-120-10-36B-CWY-TR3
12MHz
Y1, Y2
2
USB4510-03-1-A
USB_C_Receptacle_USB2.0
J1, J4
2
MJ-4PP-9
J2, J3
63
D
D_1, D_2, D_3, D_4, D_5, D_6, D_7, D_8 +55
2
MF-FSMF050X-2
500mA
F1, F2
2
EVP-BL2A1B000
SWITCH
SW1, SW2
46
KEYSW
SW_1, SW_5, SW_8, SW_9, SW_10, SW_11, SW_13, SW_14 +38
2
KEYSW
SW_2, SW_62
1
KEYSW
SW_3
8
KEYSW
SW_4, SW_7, SW_12, SW_17, SW_48, SW_53, SW_60, SW_63
3
KEYSW
SW_6, SW_30, SW_58
2
KEYSW
SW_35, SW_59
1
KEYSW
SW_61
2
CLK
TP1, TP3
Show 19 more
QtyPartRefs
2
DIO
TP2, TP4
63
YS-SK6812MINI-E
LED1, LED2, LED3, LED4, LED7, LED8, LED9, LED10 +55
26
YS-SK6812MINI-E
LED5, LED6, LED15, LED16, LED17, LED18, LED24, LED25 +18
2
PMEG2010BELD,315
PMEG2010BELD
D1, D5
2
B1811URO-20D000113U1930
Power LED
D2, D6
2
B1811NB--05D000113U1930
User LED
D3, D4
2
BLM15PX601SN1D
600R
FB1, FB2
89
0.1uF
C1, C2, C3, C4, C5, C6, C7, C8 +81
8
10uF 20% 10V 0402
10u
C5b1, C5b2, C43, C44, C45, C72, C73, C74
20
100nF 10% 10V 0402
100n
C6_A1, C6_A2, C50, C51, C52, C53, C54, C55 +12
2
4.7uF 20% 10V 0402
4.7u
C6b1, C6b2
4
15pF 5% 10V
15p
C46, C47, C59, C60
4
1uF 20% 10V 0402
1u
C48, C49, C61, C62
2
500
R1, R27
6
51k 1% 0402
51k
R2, R3, R4_L1, R4_R1, R24, R25
10
10k 1% 0402
10k
R3_L1, R3_R1, R3b1, R3b2, R4b1, R4b2, R8, R14 +2
6
5.1k 1% 0402
5.1k
R4, R5, R13, R19, R21, R22
8
1k 1% 0402
1k
R6, R7, R11, R12, R17, R18, R23, R26
4
27 1% 0402
27
R9, R10, R15, R16

Umiko design files

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

Umiko: common questions

What microcontroller does the Umiko use?

The Umiko is built around the SC0914(13), from the RP2040/RP2350 family.

How many components are on the Umiko?

414 components, from 39 distinct parts. The full bill of materials is listed on this page.

Where can I download the Umiko design files?

From the idorurez/umiko repository on GitHub, which has the schematic and a netlist; the links under Design files point to each one.

Can I use the Umiko design in my own project?

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

Can I test firmware for the Umiko without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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