Wiring up this schematic on a breadboard should be an easy task. Just upload your firmware hex file to the microcontroller chip. And Open any serial terminal on your PC (the simplest way is to use the Arduino’s serial monitor). Make sure to set the baud rate to 9600 bps. You can also use my old custom-made serial monitor. And here is a video for the final output of this LAB.

Later that 5 V supply was used in almost any computer as computers are made using logic chips which need 5 V, at least the TTL ones. Even as TTL was replaced by CMOS logic large parts of computer electronics still used 5 V even though CMOS could also run on lower voltages. VCP (Virtual COM Port): The PC side will be recognized as a serial port, using the serial protocol.If you installed the drivers for the CH340 on your computer but have issues connecting via serial terminal or uploading code using the Arduino IDE, there may be an issue with your user settings preventing you from using the CH340. You may receive an avrdude: ser_open(): can't open device error similar to the output shown below. language:bash

Drivers are available which allow FTDI devices to work with the following operating systems: Windows Certified PLEASE NOTE – When editing driver INF files, refer to the following document: AN_107 – Advanced Driver Options The power pin provides the 5V @ 500mA direct from the USB port and the RX/TX pins are 3.3V level for interfacing with the most common 3.3V logic level chipsets. Search automatically for updated driver software on Windows 10. On Windows 11, Search automatically for drivers. Set the configuration bits to match the generic setting which we’ve stated earlier. And if you also find troubles creating this file, you can always refer to the previous tutorial using the link below.

Electrostatic reverse connection: When reverse voltage appears between the pins, or when subjected to electrostatic discharge, its internal circuit may be damaged. FTDI drivers are available for Windows CE 4.2-5.2, 6.0/7.0 and 2013. Support for older versions of Windows Desktop Learn here about TTL voltage levels: https://www.allaboutcircuits.com/textbook/digital/chpt-3/logic-signal-voltage-levels/