4 layers114.9 × 129.9 mm
Tanmatsu
Nicolai-Electronics/tanmatsu-hardware
Hardware design of the Tanmatsu mainboard
372 parts9CERN-OHL-P-2.0
4 layers114.9 × 129.9 mm
Why2025
ranzbak/why2025-hardware1Hardware design files for the WHY2025 badge
- Size
- 114.9 × 129.9 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 384
- Nets
- 334
- Pads
- 1,597
- Tracks, vias
- 5,006, 1,018
- Pours
- 1,614
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 2 Dec 2024
- Updated
- 28 Nov 2024
Overview
Why2025 is an open-source printed circuit board by ranzbak, from the ranzbak/why2025-hardware repository on GitHub. It is a 4-layer board of 114.9 × 129.9 mm with 384 parts on 334 nets, routed with 5,006 tracks and 1,018 vias.
It is built around the CH32V203C8T6, 74LVC1G17GW,125-JSM and ESP32-C6-WROOM-1-N8, with the AP3032KTR-G1, CH340K and SK6805E-J among its other parts. Its parts include 93 capacitors, 89 resistors, 85 diodes, 24 ICs and 6 transistors. It belongs with the lEDs and displays boards and the ESP32 and RISC-V boards of this library.
Main components
12
CH32V203C8T6
LQFP-48(7x7)144MHz 64KB FLASH Others LQFP-48(7x7) Microcontrollers (MCU/MPU/SOC) ROHSWCH (Nanjing Qinheng Microelectronics)Microcontrollers (MCU/MPU/SOC)
74LVC1G17GW,125-JSM
SOT-353SOT-353 Buffers, Drivers, Receivers, Transceivers ROHSJSMSEMIBuffers, Drivers, Receivers, Transceivers
ESP32-C6-WROOM-1-N8
SMD,25.5x18mm-40℃~+85℃ -99.2dBm 2.4GHz 20.5dBm 382mA 3V~3.6V 78mA ESP32-C6 On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
AP3032KTR-G1
SOT-23-6-40℃~+85℃ 1 1.4A 1MHz 2.7V~9V Boost Built-in DC-DC PWM Under Voltage Protection、Over Voltage Protection、Over-Temperature Protection (OTP) SOT-23-6 LED Drivers ROHSDiodes IncorporatedLED Drivers
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
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)
USBLC6-2P6
SOT-666-6-40℃~+125℃ 150nA 17V 2 3.5pF 5.25V 5A@8/20us 6V ESD IEC 61000-4-2 Unidirectional SOT-666-6 ESD and Surge Protection (TVS/ESD) ROHSSTMicroelectronicsESD And Surge Protection (TVS/ESD)
65K5.
SOT-23-3-40℃~+130℃@(Tj) 1 1.8V 105mV@(30mA) 10uA 300mA 6V Fixed Over Current Protection、Short Circuit Protection Positive SOT-23-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSShenzhen Fuman ElecVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
BHI360
LGA-20-40℃~+85℃ 1.5uA 1.62V~3.6V 16bit IMU (accelerometer + gyroscope) Motion event detection、Synchronization and timestamp SPI、I2C X,Y,Z X,Y,Z ±2000dps LGA-20(3x2.5) Accelerometers ROHSBosch SensortecAccelerometers
BMI270
LGA-14(2.5x3)-40℃~+85℃ 1.71V~3.6V 16bit 2KB 3.5uA Accelerometer Gyroscope SPI、I2C X,Y,Z X,Y,Z ±16g ±2000dps LGA-14(2.5x3) Accelerometers ROHSBosch SensortecAccelerometers
BQ25895RTW
WQFN-24-EP(4x4)-40℃~+85℃ 1 12uA 3.9V~14V 4.608V 5A Charging IC I2C Lithium Battery Support Support QFN-24-EP(4x4) Battery Management ROHSTexas InstrumentsBattery Management
CH334R
QSOP-16-150mil-40℃~+85℃ 0.4mA 3.3V、5V 4 480Mbps 85mA Hub I2C USB 2.0 QSOP-16-150mil USB HUB Controllers ROHSWCH (Nanjing Qinheng Microelectronics)USB HUB Controllers
README
README.mdWHY2025 badge
This repository contains the hardware design files for the WHY2025 badge.
Documentation
Detailed information can be found on our website.
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.
All organization names, logos and trademarks such as but not limited to the Badge.Team name, logo and mascots, the WHY2025 name and logo and the Nicolai Electronics name and logo are all rights reserved for their respective owners and may not be reproduced on derrivative works.
An exception to this rule is the use of the Badge.Team name and logo when accompanied by clear text indicating that the derrived work is powered by or based on a design by Badge.Team.
Authors
The electronics have been designed by Renze Nicolai from Nicolai Electronics and Paul Honig.
The WHY2025 badge frontpanel artwork has been designed by Nikolett, Ankhaneko.art.
The ergonomic board outline has been designed by Jay Visschedijk.
A special thanks to all the volunteers who contributed by helping with the routing and by debugging the hardware design:
Parts
384| Qty | Value | Footprint | References |
|---|---|---|---|
| 72 | 1N4148WS | Diode_SMD:D_SOD-323 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +56 |
| 37 | 100n | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4, C10, C16, C17, C23, C27, C28, C35, C36, C37, C38, C40, C41 +21 |
| 21 | 10k | Resistor_SMD:R_0402_1005Metric | R1, R2, R3, R4, R5, R6, R7, R21, R22, R24, R28, R29, R49, R53, R62, R63 +5 |
| 19 | 51k | Resistor_SMD:R_0402_1005Metric | R16, R25, R26, R30, R33, R34, R35, R36, R37, R38, R50, R54, R55, R56, R57, R58 +3 |
| 18 | 10u | Capacitor_SMD:C_0805_2012Metric | C7, C13, C14, C15, C20, C25, C29, C31, C33, C59, C73, C74, C79, C80, C87, C88 +2 |
| 17 | 1u | Capacitor_SMD:C_0603_1608Metric | C8, C9, C18, C19, C30, C32, C34, C39, C44, C61, C62, C63, C67, C68, C69, C76 +1 |
| 13 | 4k7 | Resistor_SMD:R_0402_1005Metric | R11, R23, R42, R45, R60, R61, R65, R66, R74, R76, R81, R99, R100 |
| 11 | 100k | Resistor_SMD:R_0402_1005Metric | R12, R27, R31, R32, R39, R47, R70, R71, R72, R98, R101 |
| 8 | LTW-010DCG-SR-G | badgeteam:LTW-010DCG-SR-G | D73, D74, D75, D76, D77, D78, D80, D81 |
| 7 | 22p | Capacitor_SMD:C_0402_1005Metric | C21, C22, C24, C47, C48, C71, C72 |
| 7 | Mounting hole | MountingHole:MountingHole_2.2mm_M2_DIN965_Pad | H5, H6, H7, H8, H9, H10, H17 |
| 6 | 22u | Capacitor_SMD:C_0805_2012Metric | C65, C66, C81, C83, C84, C85 |
| 6 | SK6805 | library:SK6805-EC20 | U9, U17, U18, U19, U22, U32 |
| 5 | 2k2 | Resistor_SMD:R_0402_1005Metric | R13, R15, R19, R46, R86 |
| 4 | 10n | Capacitor_SMD:C_0402_1005Metric | C26, C46, C49, C58 |
| 4 | AP2302B | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4 |
| 4 | Mounting hole | library:mountinghole_1.6mm | H1, H2, H3, H4 |
| 2 | 0 | Resistor_SMD:R_0402_1005Metric | R14, R69 |
| 2 | 1N5819WS | Diode_SMD:D_SOD-323 | D83, D84 |
| 2 | 2.0v | Diode_SMD:D_SOD-123 | D79, D85 |
| 2 | 27 | Resistor_SMD:R_0402_1005Metric | R17, R18 |
| 2 | 33 | Resistor_SMD:R_0402_1005Metric | R67, R68 |
| 2 | 499k | Resistor_SMD:R_0402_1005Metric | R40, R41 |
| 2 | 4k02 | Resistor_SMD:R_0402_1005Metric | R44, R52 |
| 2 | 5k1 | Resistor_SMD:R_0402_1005Metric | R9, R10 |
| 2 | 6.8uH | library:IND-SMD_L4.0-W4.0 | L4, L6 |
| 2 | AO3400 (A09T) | Package_TO_SOT_SMD:SOT-23 | Q5, Q6 |
| 2 | AP3032KTR | Package_TO_SOT_SMD:SOT-23-6 | U11, U12 |
| 2 | ESD | library:Diodes_UDFN-10_1.0x2.5mm_P0.5mm | U30, U31 |
| 2 | USBLC6-2P6 | Package_TO_SOT_SMD:SOT-666 | U28, U29 |
| 2 | ~ | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP2, JP3 |
| 1 | 0.39u | Capacitor_SMD:C_0603_1608Metric | C60 |
| 1 | 1.5k | Resistor_SMD:R_0402_1005Metric | R83 |
| 1 | 10 | Resistor_SMD:R_0402_1005Metric | R51 |
| 1 | 12MHz | Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm | Y1 |
| 1 | 180k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R73 |
| 1 | 1M | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R64 |
| 1 | 1k | Resistor_SMD:R_0402_1005Metric | R85 |
| 1 | 2.2u | library:Inductor_MSC20FC | L1 |
| 1 | 2.7v | Diode_SMD:D_SOD-323F | D86 |
| 1 | 220n | Capacitor_SMD:C_0603_1608Metric | C78 |
| 1 | 261 | Resistor_SMD:R_0402_1005Metric | R20 |
| 1 | 3.3v | TestPoint:TestPoint_Pad_D1.0mm | TP28 |
| 1 | 3.3v | harwin:Harwin S7091-42R | J14 |
| 1 | 32.768KHz | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y2 |
| 1 | 40MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y3 |
| 1 | 47n | Capacitor_SMD:C_0603_1608Metric | C11 |
| 1 | 4R7 | Resistor_SMD:R_0402_1005Metric | R48 |
| 1 | 4u7 | Capacitor_SMD:C_0603_1608Metric | C12 |
| 1 | 6.8k | Resistor_SMD:R_0402_1005Metric | R78 |
| 1 | 65K5. | lcsc:SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR | U25 |
| 1 | 74LVC1G17GW,125 | Package_TO_SOT_SMD:SOT-353_SC-70-5 | U20 |
| 1 | 74LVC2G02HD4-7 | lcsc:X2-DFN2010-8_L2.0-W1.0-P0.50-BL | U26 |
| 1 | BHI360 | library:XDCR_BHI360 | U10 |
| 1 | BHI360_INT | TestPoint:TestPoint_Pad_D1.0mm | TP18 |
| 1 | BI270_INT | TestPoint:TestPoint_Pad_D1.0mm | TP19 |
| 1 | BLK+ | TestPoint:TestPoint_Pad_D1.0mm | TP13 |
| 1 | BLK- | TestPoint:TestPoint_Pad_D1.0mm | TP14 |
| 1 | BLKC | TestPoint:TestPoint_Pad_D1.0mm | TP1 |
| 1 | BLL+ | TestPoint:TestPoint_Pad_D1.0mm | TP11 |
| 1 | BLL- | TestPoint:TestPoint_Pad_D1.0mm | TP12 |
| 1 | BLLC | TestPoint:TestPoint_Pad_D1.0mm | TP2 |
| 1 | BME688_C3664478 | lcsc:LGA-8_L3.0-W3.0-P0.80_BME688 | U33 |
| 1 | BMI270 | library:LGA-14_L3.0-W2.5-P0.50-BR | U34 |
| 1 | BQ25895RTW | library:Texas_S-PWQFN-N24_EP2.7x2.7mm_ThermalVias | U6 |
| 1 | Battery | library:JST_S2B-ZR-SM4A-TF(LF)(SN) | J13 |
| 1 | Board | proto1_kicad:why2025-mainboard | N1 |
| 1 | Boot | library:KEY-TH_TC-1101V-C-A-W | SW3 |
| 1 | C6RX | TestPoint:TestPoint_Pad_D1.0mm | TP17 |
| 1 | C6TX | TestPoint:TestPoint_Pad_D1.0mm | TP16 |
| 1 | CAMERA | Connector_FFC-FPC:Hirose_FH12-22S-0.5SH_1x22-1MP_P0.50mm_Horizontal | J9 |
| 1 | CH32V203C8T6 | Package_QFP:LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | CH334R | Package_SO:QSOP-16_3.9x4.9mm_P0.635mm | U4 |
| 1 | CH340K | Package_SO:SSOP-10-1EP_3.9x4.9mm_P1mm_EP2.1x3.3mm | U7 |
| 1 | CMLW6028S1R5MST | library:IND-SMD_L6.0-W6.0 | L7 |
| 1 | DATA | TestPoint:TestPoint_Pad_1.0x1.0mm | TP22 |
| 1 | DF37NB-24DS-0.4V(51) | lcsc:CONN-SMD_DF37NB-24DS-0.4V | CN1 |
| 1 | DOUT | TestPoint:TestPoint_Pad_1.0x1.0mm | TP23 |
| 1 | ES8156 | Package_DFN_QFN:VQFN-20-1EP_3x3mm_P0.4mm_EP1.7x1.7mm | U14 |
| 1 | ESP32-C6-WROOM-1 | microcontrollers:ESP32-C6-WROOM-1 | U5 |
The 336 most common of 384 parts.
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Questions
How big is the Why2025 PCB?
It measures 114.9 × 129.9 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Why2025 use?
384 parts, built around the CH32V203C8T6, 74LVC1G17GW,125-JSM, ESP32-C6-WROOM-1-N8 and AP3032KTR-G1. 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 Why2025 KiCad files?
From the ranzbak/why2025-hardware repository on GitHub, at the commit this page was made from: the board is why2025.kicad_pcb and its schematic audio.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Why2025 design in my own project?
Its repository states no licence, so its author keeps all rights: ask ranzbak before reusing the design.