4 layers175.5 × 61.1 mm
2 layers26.2 × 53.1 mm
SemiSemafor
TVavrinec/SemiSemafor1- Size
- 26.2 × 53.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 50
- Nets
- 35
- Pads
- 204
- Tracks, vias
- 297, 53
- Pours
- 48
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 3 Apr 2023
- Updated
- 8 Sep 2025
Overview
SemiSemafor is an open-source printed circuit board by TVavrinec, from the TVavrinec/SemiSemafor repository on GitHub, published under the MIT licence. It is a 2-layer board of 26.2 × 53.1 mm with 50 parts on 35 nets, routed with 297 tracks and 53 vias.
It is built around the ESP32-C3-MINI-1, LD39200PUR and LIS2DH12, with the WS2812B among its other parts. Its parts include 18 capacitors, 12 diodes, 6 resistors, 3 ICs and 3 connectors. It belongs with the ESP32 and RISC-V boards of this library.
Main components
4ESP32-C3-MINI-1
--40℃~+81℃ -89dBm 2.4GHz 350mA 3V~3.6V 82mA ESP32-C3 Chip On-board PCB Antenna UART - WiFi Modules ROHSRF CrazyWiFi Modules
LD39200PUR
DFN-6(3x3)-40℃~+125℃@(Tj) 1 24uVrms 250mV@(2A) 2A 300uA 500mV~5.75V 6V 70dB@(1kHz) Adjustable PG Pin、Over Current Protection、Reverse connection protection、Thermal Shutdown Positive DFN-6(3x3) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSSTMicroelectronicsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
LIS2DH12
LGA-12(2x2)-40℃~+85℃ 0.2KB 1.71V~3.6V 500nA 8bit、10bit、12bit Accelerometer Motion event detection SPI、I2C X,Y,Z ±16g LGA-12(2x2) Accelerometers ROHSSTMicroelectronicsAccelerometers
WS2812B
5mm X 5mm Surface Mount RGB LED with Intelligent ControlWorldsemiUncategorised
Parts
50| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 100n | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3, C4, C5, C9, C10, C11, C12, C13, C14, C15 |
| 12 | WS2812B | LED_SMD:LED_WS2812B-2020_PLCC4_2.0x2.0mm | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12 |
| 5 | 10k | Resistor_SMD:R_0402_1005Metric | R2, R3, R4, R5, R10 |
| 2 | 100n | Capacitor_SMD:C_0402_1005Metric | C17, C18 |
| 2 | 10u | Capacitor_SMD:C_0603_1608Metric | C6, C16 |
| 2 | 1u | Capacitor_SMD:C_0402_1005Metric | C7, C8 |
| 2 | SW_DIP_x01 | Button_Switch_SMD:SW_Push_1P1T_NO_Vertical_Wuerth_434133025816 | SW1, SW2 |
| 1 | 56k | Resistor_SMD:R_0402_1005Metric | R11 |
| 1 | Conn_01x02 | RKL-ESP:ESP-Small-programming connector | J3 |
| 1 | ESP-Programing_conector | Robotarna_KiCad_Library:ESP-Programing_conector | J2 |
| 1 | ESP32-C3-MINI-1 | Robotarna_KiCad_Library:ESP32-C3-MINI-1 | U2 |
| 1 | FerriteBead | Inductor_SMD:L_0402_1005Metric | FB1 |
| 1 | LD39200 | Package_DFN_QFN:DFN-8-1EP_4x4mm_P0.8mm_EP2.3x3.24mm | U1 |
| 1 | LIS2DH12 | Package_LGA:LGA-12_2x2mm_P0.5mm | U3 |
| 1 | LOGO | LOGO | G*** |
| 1 | USB_PCB | Robotarna_KiCad_Library:usb-PCB | J1 |
The 46 most common of 50 parts.
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Questions
How big is the SemiSemafor PCB?
It measures 26.2 × 53.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the SemiSemafor use?
50 parts, built around the ESP32-C3-MINI-1, LD39200PUR, LIS2DH12 and WS2812B. 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 SemiSemafor KiCad files?
From the TVavrinec/SemiSemafor repository on GitHub, at the commit this page was made from: the board is hw/SemiSemafor/SemiSemafor.kicad_pcb and its schematic hw/SemiSemafor/SemiSemafor.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the SemiSemafor design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).