FT81X shield for ESP32 DevKitC
Posted: Wed Sep 05, 2018 1:26 pm
So, what a good way to start after switching to KiCAD?REV. List:
V1.0 - Initial version
V1.1 - Updated connector names, added jumper to CON3, added pull-downs to CON2 Pin 35,39, Corrected descriptions here'n'there.
V1.2 - Included audio circuit as mentioned in Datasheet of FT81X.
Design a board long due on my list - FT81X shield for an ESP32 DevKitC.
This will support both FT812 and FT813. Differenc is that FT812 supports resistive touch, the FT813 supports capacitive touch.
Attached below you can see the schematic. Layout is next, with lots of footprints to make.
Couple of words about the board:
- Board will feature solder holdes for 2 rows of socets to accept DevKitC plugged directly to the board. (J3)
- right next to these sockets, (underneath the DevBoard) would be 2 rows of 100mil standard holes connected to the sockets. These wilfunction as solder holes so you can solder jumper wires.
- In the middle of all this, still underneat the ESP32 board, there will solder hole stip, routing all the important signals. You can use these to jumper each signal from the shield to the DevKitC by soldering. This would allow full configurations on the signal routing. For TFT connection, there will be 2 FPC connectors. CON1 is a standard 40pin 0.5mm pitch RGB screen connector, and a 6pin FPC connector for the Capacitive touch screen.
The other is a 50pin connector, to connect displays with SPI interface, like ILI9341, or ILI9488. SPI lines needed for these screens are shared with the FT81x's SPI Bus.
Looking forward to any input on this schematic.