[Professional Edition] V2.43-2.9-inch SD ink screen reader

[Professional version import] V2.43 multi-function ink screen-SD card version

• Imported from kicad to Lichuang EDA professional version, the conversion effect is much better than the standard version, and there is no problem in direct editing.
• The front light ink screen with 4 lights connected in series has been discontinued. The front light circuit does not need to be soldered and corresponds to the left and right frames on the PCB.
• The firmware is compatible with all versions of PCB, link https://gitee.com/Lichengjiez/weather-ink-screen/releases
• I will upload the file later which can be used directly on Jiali Bandage patch.
• The changes are not big, so it has not been board verified yet.

More function introduction

[New UI] 2.9-inch SD ink screen reader

Weather ink screen-add clock chip

Development history of front-lit ink screen

V1.0

2021/07, the first version of the front-lit ink screen is released

V1.42 

2021/11, add clock chip and a lot of optimizations

V2.3

2022/02, add SD card function

V2.41

2022/04, modify button 3 pin

V2.42

2022/08, optimize SHT30 packaging and other optimizations

V2.43

2022/08, it is better to add back the 100R resistor, otherwise large-capacity cards cannot be mounted

PCB detailed update instructions

V2.44

2022/08/24, repaired the SHT30MOS tube pull-down resistor in the V2.43 board file that was not grounded, and modified some arc wiring

V2.43

Add back the 100R resistor near SHT30, otherwise the large-capacity SD card cannot be mounted

V2.42

Optimize the packaging of SHT30, greatly reducing short circuit problems caused by soldering distortion

Remove the 0.5R resistor near USB and the 100R resistor near SHT30

Optimize some PCB pad vias

Some ground pads changed to divergent connections

V2.41

Modify the pin of button 3

ADC sampling adds 104 capacitor

Remove a large number of pad vias

Some other routing optimizations

V2.32

Optimize the front light flickering problem

V2.31

SD card version first public version

V1.4X

No SD card version