ESP_UFB project

Version 0 Update
Version Name: ESP Series Universal Flashing Board V1.1, V1.2
Update Time: 2023/11/16
I. Project Introduction
Project Introduction Video
The ESP series universal flashing board can flash ESP32-Cx, ESP32, ESP32-Sx and other ESP series chips; this project has DCDC and LDO versions, which you can choose according to your needs. Module separation is a cost-reduction and efficiency-enhancing approach that is widely used.
II. Effect Diagrams
III. Functional Modules
1. USB Module The
USB interface is the more common Type-C interface, which can be plugged in either way.
2. Automatic Flashing Module
The flashing chip is the common and low-cost CH340C. RX and TX are each connected to an indicator light to indicate the flashing status. A 0 resistor is added to the power supply for easy debugging and maintenance.
The timing of automatic flashing is shown in the figure, which can be referred to the Espressif manual for details. Two buttons are reserved for manual flashing compatibility.
3.1 LDO Converter Module
The step-down module is the common and low-cost AMS1117, which can output a current of up to 1A. The rest are standard designs and require no further explanation.
3.2 The DC-DC converter/
step-down module uses the ETA3409S2F, which can output up to 3A. The choice of resistors R6 and R7 can be based on your needs; here, 100kΩ and 22kΩ are chosen. The calculation formula can be found in the chip's datasheet. Other resistors and capacitors are standard.
4. Flashing Interface :
This is a 7-pin connector. Pay special attention to the pinout; carefully check this pinout on your custom-designed board!
IV. Notes:

This project will be continuously improved and
updated. Updates will be made on the 15th or the last day of each month.
Access methods:
UP: open01_T_Jupiter; duduvue;
QQ: 826793815.


Subsequent open-source projects and updates will be released on Bilibili, LCSC Open Source Platform, Github, and Gitee. Please follow for real-time updates!