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Left

da1sh1n·Alvea·kicad/left.kicad_pcb

Left PCB layout, top view — open source board by da1sh1n
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About the Left PCB

Left is an open source PCB design by da1sh1n, published on GitHub under the CC-BY-NC-4.0 license. It is a 4-layer board measuring 137.5 × 109.3 mm, with 65 components from 33 distinct parts.

Other key parts include the SN74LVC1G17DBVR, E73-2G4M08S1C, SN74LVC1G74DQER, S2B-PH-K-S(LF)(SN) and BL8573CS8TR. By type, the board carries 20 diodes, 16 resistors, 9 ICs, 9 capacitors, 2 transistors and 1 crystal.

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

From the project

Wireless split keyboard · nRF52840 · ZMK · hexagonal keycaps

Wireless split keyboard · nRF52840 · ZMK · hexagonal keycaps

A low-power, battery-powered wireless split keyboard. Each half is a fully independent BLE device with its own battery, per-key LEDs, and USB-C charging.

Right now: finishing the PCBs and panelizing for fabrication. After that: fabrication → SMT assembly → hand-soldering → firmware → testing → case design.

Main components on the Left

SN74LVC1G17DBVRE73-2G4M08S1CSN74LVC1G74DQERS2B-PH-K-S(LF)(SN)BL8573CS8TRDW01A_C42380662LP5024RSMRMAX17048USBLC6-2SC6

Left bill of materials (BOM)

65 components, 33 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
SN74LVC1G17DBVR
TI(德州仪器)
U1
1
E73-2G4M08S1C
U2
1
SN74LVC1G74DQER
U3
1
S2B-PH-K-S(LF)(SN)
U4
1
BL8573CS8TR
U5
1
DW01A_C42380662
U6
1
LP5024RSMR
U7
1
MAX17048
U8
1
USBLC6-2SC6
U9
1
C389353
PMF170XP,115
Q1
1
FS8205A_C2830320
Q2
1
FC-13532.768KHZ9PF20PPM
X1
1
SMD1206-150C-16V
F1
3
Fiducial_1mm_Mask2mm
Fi1, Fi2, Fi3
1
HC-PM254-8.5H-1X3PW
H1
1
TS-1088-AR02016
SW1
1
TYPE-C-31-M-12
USBC1
1
NSR05F20NXT5G
D1
19
CDSQC4148-HF
D2, D3, D4, D5, D6, D7, D8, D9 +11
1
BRC2016T100K
L1
Show 13 more
QtyPartRefs
2
0402CG120J500NT
C1, C3
3
CL05A105KA5NQNC
C2, C7, C8
2
CL05B104KB54PNC
C4, C6
1
ZRB15XR61A475KE01D
muRata(村田)
C5
1
CL05A105KA5NQNC
CL05B104KB54PNC
C9
2
0402WGF1004TCE
R1, R17
1
WR04W2494FTL
R2
5
0402WGF1002TCE
R3, R4, R8, R12, R13
1
RTT022614FTH
RALEC
R5
1
ERA2AED753X
PANASONIC(松下)
R6
1
RTT022614FTH
0402WGF1002TCE
R7
4
0402WGF5101TCE
R9, R10, R14, R16
1
RC0402FR-07680RL
R11

Left design files

The KiCad project lives in the da1sh1n/Alvea repository on GitHub; these links point at the commit this page was built from.

Left: common questions

How big is the Left PCB?

The Left measures 137.5 × 109.3 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Left?

65 components, from 33 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 Left design files?

From the da1sh1n/Alvea 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 Left design in my own project?

It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.

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