ESP-Link & USB to TTL

Write in front:

       Because many projects are not suitable for adding download circuits due to cost or volume considerations, the downloader on the TB is troublesome to wire, has few functions, and is large in size. Therefore, I made a downloader suitable for ESP, and led to two problems. Converting serial port to TTL pins solves the problem of troublesome downloading.

Features:

      1. Small size, board length 4.4cm, board width 1.4cm

      2. With automatic download circuit suitable for ESP

      3. Use the toggle switch to select 5V or 3.3V TTL

      4. Two-color lights to indicate the serial port transmission status of RX and TX

Physical map:

PCB top layer:

PCB bottom layer:

other:

        The communication and data sharing group number is 523314319, which provides step-by-step assembly guidance.

         The file is designed using AD, and there will be some deviations when opening it with Easy EDA. If you need to create a board, it is recommended to directly use the .PcbDoc file without (ASCII) field in the group file.