CH340C

This work uses the CH340C chip, a simple and easy-to-use USB to TTL chip. There are three LEDs on the small board. The one in the lower right corner is the power LED, and the remaining two are RXD and TXD signal display LEDs, using sot-32 Specification n mos tube driver to prevent the LED from affecting the signal. You can also use the mos tube directly to short-circuit the corresponding pins, lead out the 3.3V and 5V power supply pins, and lead out the DTS pin. You can connect a capacitor directly for The one-click download of Ardunio leaves a welding position for a button on the back. You can control the RTS directly using the buttons instead of using the DTS pin of the chip. The chip resistors and capacitors use 0805 specifications, and the chip LEDs use 0603 specifications, can be replaced by yourself

Error: The mos tube is used incorrectly. There is no mos tube under the two LEDs. Just connect them directly. Modified https://blog.csdn.net/qq_41106435/article/details/105868476