4 layers70 × 70 mm
Access
sijinhui/SolarSystem
Fork of codeberg.org/RevK/SolarSystem — adds ESP32-S3 N16R8 (octal PSRAM) build variant (branch n16r8-octal-psram)
85 partsGPL-3.0
2 layers70 × 70 mm
Keypad
sijinhui/SolarSystemFork of codeberg.org/RevK/SolarSystem — adds ESP32-S3 N16R8 (octal PSRAM) build variant (branch n16r8-octal-psram)
- Size
- 70 × 70 mm
- Copper layers
- 2
- Thickness
- 1 mm
- Parts
- 25
- Nets
- 59
- Pads
- 236
- Tracks, vias
- 67, 29
- Pours
- 38
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 17 Oct 2026
- Updated
- 21 Oct 2026
Overview
Keypad is an open-source printed circuit board by sijinhui, from the sijinhui/SolarSystem repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 70 × 70 mm with 25 parts on 59 nets, routed with 67 tracks and 29 vias.
It is built around the ESP32-S3-MINI-1-N4R2, SP3485EEN and MD8942, with the GRM188R6YA106MA73, CL10A106MQ8NNN and XL-1010RGBC-2812B among its other parts. Its parts include 7 capacitors, 4 resistors, 4 ICs, 2 connectors and 1 diode. It belongs with the keyboards and input boards and the ESP32 boards of this library.
Main components
6
ESP32-S3-MINI-1-N4R2
SMD-103.5dBm -40℃~+85℃ 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA Bluetooth5.0 ESP32-S3 On-board PCB Antenna UART、SPI、I2C、GPIO、I2S、USB SMD WiFi Modules ROHSEspressif SystemsWiFi Modules
SP3485EEN
SOP-8-40℃~+85℃ 1 1 12Mbps 2.97V~3.63V 256 520uA Half-Duplex Transceiver SOP-8 RS-485 / RS-422 ICs ROHSUMWRS-485 / RS-422 ICs
MD8942
SOT-23-6L-40℃~+85℃ 1 1.1MHz 130uA 4V~36V 600mA 800mV~5V Buck Buck Built-in Fixed Yes SOT-23-6L DC-DC Converters ROHSShanghai Mingda MicroelectronicsDC-DC Converters
GRM188R6YA106MA73
060310uF 35V X5R ±20% 0603 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSMurataMultilayer Ceramic Capacitors MLCC - SMD/SMTCL10A106MQ8NNN
060310uF 6.3V X5R ±20% 0603 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
XL-1010RGBC-2812B
SMD,1x1mm-20℃~+85℃ 0.35mA 0.8mm 120° 1kHz 1mm 1mm 2000V 200mcd、800mcd、300mcd 4.5V~5.5V 800Kbit/s B:465nm~475nm、R:620nm~625nm、G:520nm~530nm G:525nm、R:625nm、B:470nm Top-mount Water Clear SMD,1x1mm RGB LEDs(Built-in IC) ROHSXINGLIGHTRGB LEDs(Built-In IC)
README
PCB/Generic/README.mdGeneric
These files are for use in KiCad.
Trademark
This is an open source project, but bear in mind you cannot sell boards bearing the Andrews & Arnold Ltd name, the A&A logo, the registered trademark AJK logo, or the GS1 allocated EANs assigned to Andrews & Arnold Ltd.
Images
Auto generated 2025-08-12T13:39:20
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | ~ | RevK:VCUT70N | V1, V3, V4, V6 |
| 2 | 100nF | RevK:C_0402 | C2, C5 |
| 1 | 100nF | RevK:C_0603_ | C8 |
| 1 | 10K | RevK:R_0402 | R7 |
| 1 | 10uF 35V | RevK:C_0603_ | C6 |
| 1 | 10uF 6.3V | RevK:C_0603_ | C7 |
| 1 | 10uH | RevK:L_4x4_ | L2 |
| 1 | 124k | RevK:R_0402_ | R5 |
| 1 | 1M | RevK:R_0402_ | R9 |
| 1 | 1uF | RevK:C_0402 | C4 |
| 1 | 22uF | RevK:C_0603 | C3 |
| 1 | 39k2 | RevK:R_0402_ | R6 |
| 1 | 70x70 | RevK:PCB7070 | PCB1 |
| 1 | AJK | RevK:AJK | Logo1 |
| 1 | ESP32-S3-MINI-1 | RevK:ESP32-S3-MINI-1 | U3 |
| 1 | Keypad | RevK:Molex_MiniSPOX_H4V | J1 |
| 1 | MD8942 | RevK:SOT-23-6-MD8942 | U5 |
| 1 | QR | RevK:QR-SS | U4 |
| 1 | SP3485 | RevK:SO-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | TC2030-USB-NL-DS | RevK:Tag-Connect_TC2030-IDC-NL_2x03_P1.27mm_Vertical | J4 |
| 1 | XL-1010RGBC-WS2812B | RevK:SMD1010 | D1 |
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Questions
How big is the Keypad PCB?
It measures 70 × 70 mm and has 2 copper layers, 1 mm thick.
What parts does the Keypad use?
25 parts, built around the ESP32-S3-MINI-1-N4R2, SP3485EEN, MD8942 and GRM188R6YA106MA73. 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 Keypad KiCad files?
From the sijinhui/SolarSystem repository on GitHub, at the commit this page was made from: the board is PCB/Keypad/Keypad.kicad_pcb and its schematic Old-PCB/Access/Access.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Keypad design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).