BB-CH340T - Open Source Hardware Board
BB-CH340T - Open Source Hardware Board BB-CH340T - Open Source Hardware Board BB-CH340T - Open Source Hardware Board
USB to Serial converter with CH340T IC, suitable for breadboarding
Price3.95 EUR
10 - 49 pcs3.56 EUR
50 - 10000 pcs3.16 EUR
In Stock
BB-CH340T is OSHW certified Open Source Hardware with UID BG000069.

USB <-> serial converter with 3.3V or 5V voltage selection (both powering and serial lines)

Notice that there are no wires included, if you need wires consider getting JW-200x10-FF or JW-200x10-FM


  • Implements CH340, popular chip with good software support
  • Fully open hardware design
  • USB micro connector - USB 2.0 full speed compatible
  • Serial interface with variable baud rate - 50 bps to 2Mbps
  • Breadboard-friendly - 4 pin 0.1" header
  • Extracts power from the USB - can provide either up to 80mA@3.3V or up to 450mA@5V
  • 3.3V or 5V output controlled by an SMT jumper - soldered by default to 3.3V
  • Serial datalines (RXD and TXD) kept at same voltage levels as the selected voltage output
  • PCB dimensions: (1000 x 1050)mil ~ (25.5 x 26.5)mm 


  • BB-CH340T doesn't work well with bauds over 115200. What to do?
  • Some older drivers might have wrong timings, causing worse throughput. Download and install the latest drivers for CH340. If you are using Linux make sure to try with these drivers: high-speed driver for Linux
  • This board used to have mini USB connector! My latest purchase came with micro USB connector. Why the change?
  • Yes, in hardware revision B the USB connector was changed from USB mini to USB micro. The reason for the change was that USB micro cables are far more common and easier and cheapr to acquire, and in most cases customers already have a USB micro cable anyway.