2 layers10.2 × 12.7 mm
2 layers70 × 70 mm
Reference
present1001/KiCad-PartsVarious KiCad parts
- Size
- 70 × 70 mm
- Copper layers
- 2
- Thickness
- 0.8 mm
- Parts
- 28
- Nets
- 24
- Pads
- 110
- Tracks, vias
- 33, 2
- Pours
- 30
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 19 Aug 2025
- Updated
- 13 Aug 2025
Overview
Reference is an open-source printed circuit board by present1001, from the present1001/KiCad-Parts repository on GitHub. It is a 2-layer board of 70 × 70 mm with 28 parts on 24 nets, routed with 33 tracks and 2 vias.
It is built around the CH340X, LMR16006XDDCR and MD8942. Its parts include 8 resistors, 7 capacitors, 4 ICs, 2 diodes and 2 inductors.
Main components
3
CH340X
MSOP-10-20℃~+70℃ 2Mbps 3.3V、5V USB 2.0 USB to serial、USB to Parallel MSOP-10 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
LMR16006XDDCR
SOT-6-40℃~+125℃@(TJ) 1 28uA 4V~60V 600mA 700kHz 765mV~55V Adjustable Buck Buck Built-in No SOT-6 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
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
README
README.mdKiCad-Parts
Various stuff I use, some original, some copies with tweaks...
The 3D models are usually copies from suppliers, but some are based on SCAD (included in teh 3D directory).
Use of logos requires permission from trade mark and copyright holders...
Parts
28| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 100nF | RevK:C_0603_ | C1, C6 |
| 2 | ~ | RevK:VCUT70 | V1, V2 |
| 1 | 0.1uF | RevK:C_0402 | C7 |
| 1 | 100k 1% | RevK:R_0603 | R1 |
| 1 | 10uF | RevK:C_0805_ | C3 |
| 1 | 10uF 50V | RevK:C_0603_ | C4 |
| 1 | 10uF 6.3V | RevK:C_0603_ | C5 |
| 1 | 10uH | RevK:L_4x4_ | L2 |
| 1 | 124k | RevK:R_0402_ | R3 |
| 1 | 1M | RevK:R_0402_ | R5 |
| 1 | 2.2uF | RevK:C_0805_ | C2 |
| 1 | 220R | RevK:R_0402 | R8 |
| 1 | 2K | RevK:R_0402 | R7 |
| 1 | 30k 1% | RevK:R_0603 | R2 |
| 1 | 40k2 | RevK:R_0402_ | R4 |
| 1 | 6.8uH | RevK:L_4x4_ | L1 |
| 1 | 680R | RevK:R_0402 | R6 |
| 1 | 70x70 | RevK:PCB7070 | PCB1 |
| 1 | AJK | RevK:AJK | Logo1 |
| 1 | Barcode | RevK:EAN-5060634238069 | U3 |
| 1 | CH340X | RevK:CH340X | U4 |
| 1 | Conn_01x04 | RevK:JLC-PinHeader_1x04_P2.54mm_Right | J1 |
| 1 | LMR16006XDDCR | RevK:SOT-23-Thin-6-Reg | U1 |
| 1 | MD8942 | RevK:SOT-23-6-MD8942 | U2 |
| 1 | RGB | RevK:LED-RGB-1.6x1.6 | D2 |
| 1 | Schottky | RevK:D_1206_ | D1 |
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Questions
How big is the Reference PCB?
It measures 70 × 70 mm and has 2 copper layers, 0.8 mm thick.
What parts does the Reference use?
28 parts, built around the CH340X, LMR16006XDDCR and MD8942. 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 Reference KiCad files?
From the present1001/KiCad-Parts repository on GitHub, at the commit this page was made from: the board is PCB/Reference/Reference.kicad_pcb and its schematic PCB/LMR16006/Regulator.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Reference design in my own project?
Its repository states no licence, so its author keeps all rights: ask present1001 before reusing the design.