4 layers114.9 × 129.9 mm
Tanmatsu
Nicolai-Electronics/tanmatsu-hardware
Hardware design of the Tanmatsu mainboard
372 parts9CERN-OHL-P-2.0
4 layers95 × 86 mm
Kami is a modernized re-imagining of the SHA2017 epaper badge by Badge.Team.
- Size
- 95 × 86 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 118
- Nets
- 100
- Pads
- 443
- Tracks, vias
- 983, 313
- Pours
- 421
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 6 Dec 2024
- Updated
- 20 May 2025
Overview
Kami is an open-source printed circuit board by Nicolai-Electronics, from the Nicolai-Electronics/kami-hardware repository on GitHub, published under the CERN-OHL-P-2.0 licence. It is a 4-layer board of 95 × 86 mm with 118 parts on 100 nets, routed with 983 tracks and 313 vias.
It is built around the 74LVC1G17GW,125-JSM, ESP32-WROVER-E(4MB) and CH340K, with the MPR121QR2, TPS63020DSJR and SK6805E-J among its other parts. Its parts include 38 resistors, 30 capacitors, 15 ICs, 7 connectors and 5 diodes. It belongs with the lEDs and displays boards and the ESP32 boards of this library.
Main components
11
74LVC1G17GW,125-JSM
SOT-353SOT-353 Buffers, Drivers, Receivers, Transceivers ROHSJSMSEMIBuffers, Drivers, Receivers, Transceivers
ESP32-WROVER-E(4MB)
SMD,18x31.4mmSMD,18x31.4mm WiFi Modules ROHSEspressif SystemsWiFi Modules
CH340K
ESSOP-10-150mil-1mm-20℃~+70℃ 2Mbps 3.3V、5V USB 2.0 USB to serial ESSOP-10-150mil-1mm USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
MPR121QR2
QFN-20(3x3)-40℃~+85℃ 1.71V~3.6V 12 29uA 2kV 3uA Capacitive Touch QFN-20(3x3) Touch Sensors ROHSNXP SemiconductorsTouch Sensors
TPS63020DSJR
VSON-14-EP(3x4)-40℃~+85℃@(TA) 1 1.2V~5.5V 1.8V~5.5V 2.4MHz 3A 50uA Adjustable Buck-Boost Buck-Boost Built-in Yes VSON-14-EP(3x4) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
SK6805E-J
SMD,5.4x5mm-40℃~+85℃ 0.5mA 1.6mm 100mcd~200mcd 100ns 120° 1kHz 2000V 3.7V~5.5V 385mcd~697.5mcd 460nm~470nm 5.4mm 50ns 520nm~535nm 5mm 620nm~625nm 800Kbit/s 80mcd~160mcd 80ns Built-in power-on reset circuit Semi-transparent lens SMD,5.4x5mm RGB LEDs(Built-in IC) ROHSOPSCO OptoelectronicsRGB LEDs(Built-In IC)
SY6280AAC
SOT-23-5-40℃~+125℃ 1 2.4V~5.5V 80mΩ Active High High Side Switch Overcurrent Protection(OCP)、Over Temperature Protection SOT-23-5 Power Distribution Switches ROHS矽力杰silergyPower Distribution SwitchesXT4054K421MR-G
SOT-23-5L-40℃~+85℃ 1 25uA 4.25V~6.5V 4.2V 500mA Charging IC Lithium Battery SOT-23-5L Battery Management ROHSNATLINEARBattery Management
NSR0320MW2T1G
SOD-323Schottky DiodesDOWO
AP2302B
SOT-23-55℃~+150℃ 1 N-channel 1.2V 120pF 2.8A 20V 300pF 350mW 4nC@4.5V 70mΩ@2.5V 80pF N-Channel ±10V SOT-23 MOSFETs ROHSALLPOWERMOSFETs
CMLW6028S1R5MST
SMD,6x6mm1.5uH 13mΩ 4.58A 6A Magnetic Shielded Inductor ±20% SMD,6x6mm Power Inductors ROHSCybermaxPower Inductors
README
README.mdKami: a simple epaper badge
Kami is a modernized re-imagining of the SHA2017 epaper badge by Badge.Team.
Documentation
Need the schematic? It's in this repository as a PDF file.
License
This hardware design may be used under the terms of the CERN-OHL-P license.
Parts
118| Qty | Value | Footprint | References |
|---|---|---|---|
| 15 | 10k | Resistor_SMD:R_0402_1005Metric | R2, R6, R7, R14, R17, R18, R19, R20, R21, R22, R26, R37, R38, R39, R40 |
| 10 | 100n | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C8, C12, C23, C24, C25, C29, C30 |
| 8 | 1u | Capacitor_SMD:C_0603_1608Metric | C13, C14, C16, C17, C18, C19, C20, C21 |
| 7 | 100k | Resistor_SMD:R_0402_1005Metric | R4, R23, R24, R30, R31, R32, R35 |
| 6 | 22u | Capacitor_SMD:C_0805_2012Metric | C4, C5, C7, C9, C26, C27 |
| 6 | SK6805 | library:SK6805-EC20 | U8, U11, U12, U13, U14, U15 |
| 5 | 4.7k | Resistor_SMD:R_0402_1005Metric | R10, R13, R27, R28, R33 |
| 5 | NSR0320MW2T1G | library:D_SOD-323 | D23, D24, D25, D26, D27 |
| 4 | 10u | Capacitor_SMD:C_0805_2012Metric | C6, C10, C11, C28 |
| 4 | ~ | MountingHole:MountingHole_2.7mm_M2.5_Pad_TopOnly | H3, H4, H6, H7 |
| 3 | SY6280AAC | Package_TO_SOT_SMD:SOT-23-5 | U6, U9, U10 |
| 2 | 45.3k | Resistor_SMD:R_0402_1005Metric | R5, R8 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R15, R16 |
| 2 | AO3400 (A09T) | Package_TO_SOT_SMD:SOT-23 | Q4, Q5 |
| 2 | AP2302B | library:SOT-23 | Q2, Q3 |
| 1 | 0 | Resistor_SMD:R_0402_1005Metric | R36 |
| 1 | 180k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R12 |
| 1 | 1A | library:Fuse_0805_2012Metric | F1 |
| 1 | 1M | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R11 |
| 1 | 1k | Resistor_SMD:R_0402_1005Metric | R29 |
| 1 | 2.2 | Resistor_SMD:R_0805_2012Metric | R34 |
| 1 | 2k | Resistor_SMD:R_0402_1005Metric | R25 |
| 1 | 4.7u | Capacitor_SMD:C_0603_1608Metric | C15 |
| 1 | 470n | Capacitor_SMD:C_0603_1608Metric | C22 |
| 1 | 47u | library:L_1210_3225Metric | L2 |
| 1 | 74LVC1G17GW,125 | Package_TO_SOT_SMD:SOT-353_SC-70-5 | U1 |
| 1 | 75k | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | A | library:TOUCH_BUTTON | T4 |
| 1 | B | library:TOUCH_BUTTON | T3 |
| 1 | Battery | library:JST_S2B-ZR-SM4A-TF(LF)(SN) | J9 |
| 1 | CH340K | Package_SO:SSOP-10-1EP_3.9x4.9mm_P1mm_EP2.1x3.3mm | U7 |
| 1 | CMLW6028S1R5MST | library:IND-SMD_L6.0-W6.0 | L1 |
| 1 | Cross | library:TOUCH_CROSS | T5 |
| 1 | E-Paper | library:Hirose_FH12-24S-0.5SH_1x24-1MP_P0.50mm_Horizontal | J10 |
| 1 | ESP32-WROVER-E | Espressif:ESP32-WROVER-E | U3 |
| 1 | EXT | library:EXPANSION | J4 |
| 1 | Home | design:home | T6 |
| 1 | MPR121QR2 | Package_DFN_QFN:UQFN-20_3x3mm_P0.4mm | U2 |
| 1 | Menu | design:menu | T7 |
| 1 | Micro_SD_Card | library:SD_Card-micro_socket_A | J2 |
| 1 | QWIIC | library:Qwiic 1X04_1MM_RA_GND | J1 |
| 1 | SAO | library:SAO Female THT Labels | J3 |
| 1 | SW_SPDT | library:SW_SPDT_PCM12_MP | SW6 |
| 1 | Select | library:TOUCH_SELECT | T1 |
| 1 | Start | library:TOUCH_SELECT | T2 |
| 1 | TPS63020DSJR | library:VSON-14_L4.0-W3.0-P0.50-BL-EP_TI_DSJ | U4 |
| 1 | USB-C | library:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J6 |
| 1 | XT4054K421MR-G | library:SOT-23-5 | U5 |
| 1 | ~ | MountingHole:MountingHole_3.2mm_M3_DIN965_Pad_TopOnly | H1 |
| 1 | ~ | NetTie:NetTie-2_SMD_Pad0.5mm | JP1 |
| 1 | ~ | MountingHole:MountingHole_3.2mm_M3_DIN965 | H2 |
| 1 | ~ | MountingHole:MountingHole_2.7mm_M2.5_DIN965 | H5 |
Questions
How big is the Kami PCB?
It measures 95 × 86 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Kami use?
118 parts, built around the 74LVC1G17GW,125-JSM, ESP32-WROVER-E(4MB), CH340K and MPR121QR2. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Kami KiCad files?
From the Nicolai-Electronics/kami-hardware repository on GitHub, at the commit this page was made from: the board is kami.kicad_pcb and its schematic audio.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Kami design in my own project?
Its repository publishes it under the CERN-OHL-P-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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