2 layers13.5 × 11 mm
2 layers18 × 11 mm
- Size
- 18 × 11 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 14
- Nets
- 24
- Pads
- 75
- Tracks, vias
- 167, 26
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 11 May 2023
- Updated
- 11 Mar 2024
Overview
Base is an open-source printed circuit board by brainsmoke, from the brainsmoke/uuart repository on GitHub. It is a 2-layer board of 18 × 11 mm with 14 parts on 24 nets, routed with 167 tracks and 26 vias.
It is built around the CH340B, AP2112K-3.3 and UMH3N. Its parts include 5 resistors, 4 capacitors, 2 ICs, 2 connectors and 1 transistor.
Main components
3
CH340B
SOP-1615mA 200uA 2Mbps 3.3V、5V Transceiver USB 2.0 SOP-16 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
AP2112K-3.3
SOT253.3V 600mA CMOS Low Dropout Linear Regulator with EnableDiodes IncorporatedUncategorised
UMH3N
SOT-363-55℃~+150℃ 0.5uA 100 100mA 150mW 2 NPN (Pre-Biased) 250MHz 300mV 50V 5V 6.11kΩ NPN SOT-363 Digital Transistors ROHSJiangsu Changjing Electronics Technology (CJ)Digital Transistors
README
uart/README.mduntested
Parts
14| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 1uF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C4 |
| 2 | 10k Ohm | Resistor_SMD:R_0603_1608Metric | R4, R5 |
| 2 | 5k1 Ohm | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 1 | 100nF | Capacitor_SMD:C_0603_1608Metric | C3 |
| 1 | 5k1 Ohm (optional for UPDI) | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | CH340B | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U1 |
| 1 | Conn_02x04_Top_Bottom | serial:PinSocket_2x04_P2.54mm_Edge | J2 |
| 1 | UMH3N | Package_TO_SOT_SMD:SOT-363_SC-70-6 | Q1 |
| 1 | USB_C_Receptacle_USB2.0 | footprints:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
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Questions
How big is the Base PCB?
It measures 18 × 11 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Base use?
14 parts, built around the CH340B, AP2112K-3.3 and UMH3N. 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 Base KiCad files?
From the brainsmoke/uuart repository on GitHub, at the commit this page was made from: the board is espprog/base.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Base design in my own project?
Its repository states no licence, so its author keeps all rights: ask brainsmoke before reusing the design.