DIY Weixue 3.7-inch ink screen txt novel reader electronic clock

The Weixue 3.7-inch ink screen version of the reader
is different from the previous uc8253 version of the reader. This time the improvements are as follows: 1. More fonts, supporting 4 sizes/types of font files, so the MCU needs to be updated to the ESP32 16M flash version!!!
2. Modify PCB details to facilitate fpc cable installation, 3D printing and assembly of ink screen and PCB
3. Larger buttons to improve reading and pressing comfort, so the previous version of the long button version of the silent button is replaced with a flat version, refer to the figure below, the picture is the main reference, the PCB part refers to the latest schematic diagram and PCB silk screen
4. The ink screen has a higher resolution. The resolution of Weixue's 3.7 version SSD1677 is 480*280, and the previous version was 416*240. Higher resolution means that the details are more visible and larger fonts can be used. The actual display effect is better than the picture. Because the picture is compressed, the edges of the fonts are blurred
5. The component number on the PCB is directly changed to the value of the resistance and capacitance to facilitate soldering of the PCB
6. The problem of the previous version's cost being too low (the ink screen cost is 55+8) has been fixed. The cost of this version has finally broken through the 100 yuan mark (the ink screen cost alone is 100+) -_-b
 
For other precautions, please refer to the previous version