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martinberlin / H-spi-adapters

PCB design for SPI adapters (HATs)

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10 - Idea for a mini PCB for 128x128 Sharp memory LCD

martinberlin opened this issue · comments

commented

This is more like a challenge than a real PCB that goes to fabrication.
I like a lot this small Sharp LCDs since they have a great refresh rate compared to epaper displays. So here is the challenge:

To build a small watch PCB with following constraints / features:

  • Not much bigger than the display itself 32 x 37.4 mm max.
  • No UART chip this time, but the USB-C will be connected to the data pins of MCU (JTAG interface)
  • DS3231Mz RTC
  • TP4057🔋 charger
  • 10 pin connector for LCD
  • 6 pin FPC for touch (optional)
  • MCU (not sure what one yet) would prefer one that has at least 2MB external RAM so you can use LVGL

Note: That the Sharp LCD does not have touch. I will use one 1.54" FTxxx from GoodDisplay driven by my own fork:
https://github.com/martinberlin/FT6X36-IDF