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serial_basic_breakout-ch340c's Introduction

SparkFun Serial Basic Breakout - CH340C

SparkFun Serial Basic Breakout - CH340C

SparkFun Serial Basic Breakout - CH340C (DEV-15096)

This is a CH340C based board that converts USB to Serial. We've added USB-C to the Serial Basic line which can provide up to 1.5 Amps of power to your next project. USB-C is also reversable, which means you'll never plug in a cable wrong again. It follows the standard Arduino pin out so this can be used to program the Pro and Pro Mini line of Arduinos. It can also be used as a general serial device for debugging (such as with a GPS module).

Board defaults to 3.3V output and 3.3V serial signals, but cutting the trace on the underside of the board and soldering a jumper to 5V changes the VCC pin to output 5V and changes serial comm signals to 5V.

Repository Contents

  • /Hardware - Eagle design files (.brd, .sch)
  • /Production - Production panel files (.brd)

Documentation

License Information

This product is open source!

Please review the LICENSE.md file for license information.

If you have any questions or concerns on licensing, please contact [email protected].

Distributed as-is; no warranty is given.

  • Your friends at SparkFun.

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serial_basic_breakout-ch340c's Issues

USB not detected on Raspberry pi 3B+

I have connected the Serial_Basic_Breakout-CH340C to my raspberry pi via an externally powered USB hub following is the output of dmesg -w

2023-12-28-114350_1920x1080_scrot

The device is not detected /dev/ttyyUSB* or lsusb

CH340C Implementation with 5V and 3V3 Support

The CH340C datasheet says to connect V3 to VCC when running in 3V3 mode, but the CH340C breakout board with USB C does not implement this.

Product: https://cdn.sparkfun.com/assets/5/2/5/4/2/Serial-Basic-CH340C-and-USBC.pdf
Datasheet: https://cdn.sparkfun.com/assets/5/0/a/8/5/CH340DS1.PDF
Section 5.1
CH340 supports 5V and 3.3V power supply. When using 5V power supply, the VCC pin connects 5V power and the V3 pin should connect with a 0.1uF decoupling capacitor. When using 3.3V power supply, V3 should connect with VCC, both powered with 3.3V power supply, and the other circuit voltage which connected with CH340 cannot exceed 3.3V

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