4 layers19 × 9.5 mm
2 layers29 × 62.2 mm
Steer32
jpt1729/Steer32Steer32 is an ESP32 Devboard with support for a lipo battery and a 1.9" IPS Screen
- Size
- 29 × 62.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 58
- Nets
- 87
- Pads
- 298
- Tracks, vias
- 631, 56
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 24 May 2026
- Updated
- 17 Jul 2026
Overview
Steer32 is an open-source printed circuit board by jpt1729, from the jpt1729/Steer32 repository on GitHub. It is a 2-layer board of 29 × 62.2 mm with 58 parts on 87 nets, routed with 631 tracks and 56 vias.
It is built around the CP2104EK, ESP32-S3-MINI-1-N8 and AP2112K-3.3, with the BQ24090DGQR, USBLC6-2SC6 and SS8050 among its other parts. Its parts include 23 resistors, 12 capacitors, 6 ICs, 3 transistors and 3 connectors. It belongs with the microcontroller boards and power boards and the ESP32 boards of this library.
Main components
6CP2104EK
-- USB Conversion Modules ROHSSilicon LabsUSB Conversion Modules
ESP32-S3-MINI-1-N8
SMD-104.5dBm -40℃~+85℃ 2.4GHz 20.5dBm 330mA 3V~3.6V 97mA Bluetooth5.0 ESP32-S3FN8 Chip On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD WiFi Modules ROHSEspressif SystemsWiFi Modules
AP2112K-3.3
SOT253.3V 600mA CMOS Low Dropout Linear Regulator with EnableDiodes IncorporatedUncategorised
BQ24090DGQR
MSOP-10-EP0℃~+125℃ 1 1A 1mA 4.2V 4.45V~6.45V Charging IC Lithium Battery Support Support MSOP-10-EP Battery Management ROHSTexas InstrumentsBattery Management
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
SS8050
SOT-323-55℃~+150℃ 1 NPN 1.5A 100MHz 100nA 200 25V 300mW 500mV 5V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
README
README.mdSteer32
Steer32 (named after the bovine classification of Bevo) is a custom ESP32-S3-Mini-1 devboard made specifically with hackathons in mind.
Main features different from normal ESP32s
- Built in display.
- Option to plug in LIPO batteries.
Board
|
Front |
Back |
Schematic
Repo structure
steer32.kicad_pro/.kicad_sch/.kicad_pcb— main KiCad project.custom-library/— custom KiCad symbols and footprints used by the project.docs/— BOM (BOM.md,steer32.numbers).scripts/— helper scripts (kicad_label_align.py).gerber.zip— exported fabrication files (gitignored, regenerate via KiCad plot).
Parts
58| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 10k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2, R7, R8, R9, R14, R19, R21, R22, R23 |
| 7 | 330 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R10, R11, R12, R13, R17, R18 |
| 5 | 0.1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C2, C3, C4, C11 |
| 4 | 4.7 uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C7, C8, C9, C10 |
| 2 | 22 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R5, R6 |
| 2 | 22 uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C5, C6 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R4 |
| 2 | LOGO | LOGO | G***, G*** |
| 2 | SS8050 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R20 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R15 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C12 |
| 1 | 2k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R16 |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | BOOT Switch | Button_Switch_SMD:SW_SPST_TS-1088-xR020 | BOOT |
| 1 | BQ24090DGQ | Package_SO:MSOP-10-1EP_3x3mm_P0.5mm_EP1.73x1.98mm_ThermalVias | U2 |
| 1 | Battery_conn_in | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J1 |
| 1 | CHG | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | CHG |
| 1 | CP2104 | Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm | U3 |
| 1 | Conn_01x16_Pin | Connector_PinHeader_2.54mm:PinHeader_1x16_P2.54mm_Vertical | J2 |
| 1 | Conn_01x22_Pin | Connector_PinHeader_2.54mm:PinHeader_1x22_P2.54mm_Vertical | J3 |
| 1 | D_Schottky | Diode_SMD:D_SOD-123 | D6 |
| 1 | Display-1.9in-IPS-170x320 | Custom:Display_1.9in_IPS_170x320_29x62mm | U5 |
| 1 | ESP32-S3-MINI-1 | RF_Module:ESP32-S2-MINI-1 | U1 |
| 1 | PG | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | PG |
| 1 | PWR | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | PWR |
| 1 | Q_PMOS_GSD | Package_TO_SOT_SMD:SOT-23 | Q3 |
| 1 | RST Switch | Button_Switch_SMD:SW_SPST_TS-1088-xR020 | RESET |
| 1 | RX | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | RX |
| 1 | TX | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | TX |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U6 |
| 1 | USB_C_Receptacle | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | USB_C1 |
Questions
How big is the Steer32 PCB?
It measures 29 × 62.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Steer32 use?
58 parts, built around the CP2104EK, ESP32-S3-MINI-1-N8, AP2112K-3.3 and BQ24090DGQR. 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 Steer32 KiCad files?
From the jpt1729/Steer32 repository on GitHub, at the commit this page was made from: the board is steer32.kicad_pcb and its schematic steer32.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Steer32 design in my own project?
Its repository states no licence, so its author keeps all rights: ask jpt1729 before reusing the design.
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