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2 layers20.8 × 33 mmOpenUSB2Serial, the printed circuit board in 3D

OpenUSB2Serial

blark/OpenUSB2Serial2

An open source USB to TTL serial adapter

Size
20.8 × 33 mm
Copper layers
2
Thickness
1.6 mm
Parts
13
Nets
23
Pads
70
Tracks, vias
125, 15
Pours
2
Routed
Yes
KiCad
KiCad 5 (file 20171130)
Created
1 Jun 2020
Updated
1 Jun 2020

Overview

OpenUSB2Serial is an open-source printed circuit board by blark, from the blark/OpenUSB2Serial repository on GitHub. It is a 2-layer board of 20.8 × 33 mm with 13 parts on 23 nets, routed with 125 tracks and 15 vias.

It is built around the CH340C. Its parts include 6 capacitors, 2 resistors, 2 ICs and 2 connectors. It belongs with the interfaces and adapters boards of this library.

Main components

1

README

README.md

OpenUSB2Serial

An open source USB to serial adapter based on the cheap CH340C IC.

You can get 3 of these boards from Oshpark for $5.35.

BOM

The BOM is here all passives are 805.

Sourcing parts:
USB-C connector
CH340C
AZ1117-3.3

Parts

13
QtyValueFootprintReferences
20.1uFCapacitor_SMD:C_0805_2012MetricC1, C3
210uFCapacitor_SMD:C_0805_2012MetricC2, C5
25.1kResistor_SMD:R_0805_2012MetricR1, R2
110nFCapacitor_SMD:C_0805_2012MetricC6
122uFCapacitor_SMD:C_0805_2012MetricC4
1AZ1117-3.3Package_TO_SOT_SMD:SOT-223U2
1CH340CPackage_SO:SOIC-16_3.9x9.9mm_P1.27mmU1
1SERIALConnector_PinHeader_2.54mm:PinHeader_1x07_P2.54mm_VerticalJ1
1USB_C_Receptacle_USB2.0Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12J2
1VSELJumper:SolderJumper-3_P2.0mm_Open_TrianglePad1.0x1.5mmJP1

Questions

How big is the OpenUSB2Serial PCB?

It measures 20.8 × 33 mm and has 2 copper layers, 1.6 mm thick.

What parts does the OpenUSB2Serial use?

13 parts, built around the CH340C. 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 OpenUSB2Serial KiCad files?

From the blark/OpenUSB2Serial repository on GitHub, at the commit this page was made from: the board is OpenUSB2Serial.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the OpenUSB2Serial design in my own project?

Its repository states no licence, so its author keeps all rights: ask blark before reusing the design.

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