2.8-inch Miyoo horizontal handheld console

The pictures are all from the group friend Dashi·Sha. Sincerely thank you for
 
the 2.4-inch version has been released. You can use JLC to make boards for free and remove the core board. Link: https://oshwhub.com/sunnygold/2.4cun-Miyooheng-ban-zhang-ji
 
Using the Situ system, the DCDC configuration voltage is changed to core 1.65V, DRAM 2.8V. The default overclocking
 
game console structure is: screen cover (PCB) + PCB + bottom case. The screen and screen cover are raised using 2.5MM copper pillars. The length of the screws It is M2*16.
Thanks to Be your's for painting the bottom shell.
 
Group number: 514419296
 
The following is the update part
2023/3/24 update:
1. Due to the change of JP free printing rules, 10CM+ double panels are unavoidable. If the board is changed to 4 layers, free JP proofing is available.
1. Fix the problem that the backlight adjustment level is opposite to the actual brightness. (Thanks to Qunyou Electric Soul)
2. The headphone part is adjusted to two-channel (Thanks to Qunyou Electric Soul)
3. Changed the button packaging for better comparison of welding
2023/3/8:
Fixed the NS4150B not working problem, has been typed 2/ The partners of the 28th version recommend flying a 5V network to the chip.
Fix that the charging indicator light does not light up (the picture is reversed.)
Remove the charging status detection circuit (not supported by the system)
Fix the Lite200 silk screen image (not important)
2023/2/28:
Change the audio chip to Class D NS4150B to reduce power consumption and heat.
2023/2/19:
1. Update the power amplifier part, SD pin, and IN-leakage causing the speaker to have no sound and get hot. It should be working normally now
2. Fix the button pin error (ABXY position is disordered)
 
1. Replace the chip chip as FM8002A
2. AGND is grounded and connected to the public ground through a 0 ohm resistor. I don’t know if it will improve the noise.
3. Repair the key pin misalignment
. 4. Repair the screen FPC seat position
 
demonstration video. It is best to use F1C200S in the attachment
 
. It has 64MB of memory and loads the game. The fast
screen adopts Yao Yuanhong 2.8-inch 40Pin IPS screen 2.8-inch TFT display IPS full-view LCD screen ST7789 capacitive touch SPI serial port 8-bit 16-bit - Taobao (taobao.com)
system image: group file, Situ has deleted the library