2 layers90 × 70 mm
EBoard Sidecar
Govish/EBoard-Sidecar
A circuit board for my electric longboard that controls soft power, precharge, and LEDs
119 parts
4 layers75 × 40 mm
Positioning board
UCCR1/positioning-system- Size
- 75 × 40 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 58
- Nets
- 72
- Pads
- 250
- Tracks, vias
- 318, 64
- Pours
- 9
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 11 Feb 2026
- Updated
- 25 May 2026
Overview
Positioning board is an open-source printed circuit board by UCCR1, from the UCCR1/positioning-system repository on GitHub. It is a 4-layer board of 75 × 40 mm with 58 parts on 72 nets, routed with 318 tracks and 64 vias.
It is built around the ESP32-S3-WROOM-1-N8, CH340K and TXB0102DCU, with the AMS1117-3.3, LSM6DS3 and MMBT3904 among its other parts. Its parts include 18 capacitors, 14 resistors, 8 ICs, 5 connectors and 3 diodes. It belongs with the ESP32 boards of this library.
Main components
8
ESP32-S3-WROOM-1-N8
SMD,25.5x18mm-40℃~+85℃ -98.2dBm 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA Bluetooth5.0 ESP32-S3 Chip On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD,25.5x18mm 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
TXB0102DCU
VSSOP-8-0.5mm-40℃~+85℃ 1 1.2V~3.6V 1.65V~5.5V 100Mbps 2 Auto Direction Detection Bidirectional CMOS CMOS Tri-State VSSOP-8-0.5mm Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
LSM6DS3
LGA-14(2.5x3)-40℃~+85℃ 1.71V~3.6V 8KB Accelerometer Gyroscope SPI、I2C X,Y,Z X,Y,Z ±16g ±2000dps LGA-14(2.5x3) Accelerometers ROHSSTMicroelectronicsAccelerometers
MMBT3904
SOT-23-55℃~+150℃ 1 NPN 100 100nA 200mA 200mW 300MHz 300mV 40V 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
SS24
SMA(DO-214AC)-55℃~+150℃ 200uA@40V 2A 40V 50A 550mV@2A Independent SMA(DO-214AC) Schottky Diodes ROHShongjiachengSchottky DiodesCESD3V3AP
SOT-231 10uA 120pF 13V 16A 210W@8/20us 3.3V 5V ESD IEC 61000-4-2 Unidirectional SOT-23 ESD and Surge Protection (TVS/ESD) ROHSJiangsu Changjing Electronics Technology (CJ)ESD And Surge Protection (TVS/ESD)
Parts
58| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 100n | Capacitor_SMD:C_0603_1608Metric | C3, C5, C6, C7, C10, C13, C14, C15, C16, C17, C18 |
| 7 | 10k | Resistor_SMD:R_0603_1608Metric | R3, R4, R6, R11, R12, R13, R14 |
| 3 | 10u | Capacitor_SMD:C_0603_1608Metric | C1, C8, C9 |
| 3 | 22u | Capacitor_SMD:C_0603_1608Metric | C2, C11, C12 |
| 3 | MountingHole | MountingHole:MountingHole_4.3mm_M4 | H1, H2, H3 |
| 2 | 10 | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | 22 | Resistor_SMD:R_0603_1608Metric | R9, R10 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R7, R8 |
| 2 | Conn_01x05 | Connector_JST:JST_XH_S5B-XH-A_1x05_P2.50mm_Horizontal | J2, J3 |
| 2 | LOGO | LOGO | G***, G*** |
| 2 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 2 | SS24 | Diode_SMD:D_SMA | D1, D2 |
| 2 | SW_Push | Button_Switch_SMD:SW_SPST_TS-1088-xR020 | SW1, SW2 |
| 2 | TXB0102DCU | Package_SO:VSSOP-8_2.3x2mm_P0.5mm | U7, U8 |
| 1 | 1u | Capacitor_SMD:C_0603_1608Metric | C4 |
| 1 | 3.3u | Inductor_SMD:L_Changjiang_FXL0630 | L1 |
| 1 | 4P4C | RJ11:RJ11-4P4C | J4 |
| 1 | 56.2k | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U1 |
| 1 | CESD3V3AP | Package_TO_SOT_SMD:SOT-23 | D13 |
| 1 | CH340K | Package_SO:SSOP-10-1EP_3.9x4.9mm_P1mm_EP2.1x3.3mm | U6 |
| 1 | Conn_01x04 | Connector_JST:JST_ZH_B4B-ZR_1x04_P1.50mm_Vertical | J1 |
| 1 | ESP32-S3-WROOM-1 | RF_Module:ESP32-S3-WROOM-1U | U2 |
| 1 | LSM6DS3 | Package_LGA:LGA-14_3x2.5mm_P0.5mm_LayoutBorder3x4y | U3 |
| 1 | SN65HVD1782DR | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U4 |
| 1 | TPS563200 | Package_TO_SOT_SMD:SOT-23-6 | U5 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J5 |
Questions
How big is the Positioning board PCB?
It measures 75 × 40 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Positioning board use?
58 parts, built around the ESP32-S3-WROOM-1-N8, CH340K, TXB0102DCU and AMS1117-3.3. 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 Positioning board KiCad files?
From the UCCR1/positioning-system repository on GitHub, at the commit this page was made from: the board is hardware/positioning_board.kicad_pcb and its schematic hardware/12V_buck.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Positioning board design in my own project?
Its repository states no licence, so its author keeps all rights: ask UCCR1 before reusing the design.
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