atsju / capacitivechess_hw Goto Github PK

I edit this post to add what I see or feedback I get. Please add comments here if you see something not listed

20/12/2020

• sharp LCD may need a (very big) pull down to DISP to have a clean screen during reset
• text (1-8 a-h) need only soldermask opening not a separate copper text.

28/12/2020

• need a battery reverse mount protection (O voltage drop)
• maybe change the outer cell silk border. Ask on reddit what they prefer
• LCD power supply must pass through a pin to keep DC balance ?

29/12/2020

• power supply problem 200mV ripple when battery voltage is arround 3V
• see if we can put Vbat pin to battery voltage monitoring and how much is power of consumption

31/12/2020

• pay plugged vias to have flat surface
• make a bigger board
• see if it's possible to shield arround every detection surface on top also
• USB D+/D- mixed up

02/01/2021

• put the HW revision into copper layer
• some tracks are not aligned on LQFP100 and FPC connector

03/01/2021

• default state for EPD screen transistors when MCU not programmed
• USB-C

09/01/2021

• depth routing needs to adapt also the solder paste to not have paste in holes
• USB power supply compliance

31/01/2021

• if inductive detection doesn't work, use AH1925 or AH1806 hall sensors