Teensy SDR Display Audio Processor

This PCB is part of a larger project, the KeithSDR.  This PCB mounts directly to the back of either the RA8875 based ER-TFTM043A2-7R, 800x480, 4.3" display or the RA8876 based ER-TFTM070-6, 1024x600, 7" display, and forms the main processor and display for a software defined radio.   This board is supported with software by Mike, K7MDL on his github page.

• 3 A/B rotary A/B encoder inputs with switch
• I2C Header 
  • The K7MDL code currently supports I2C LCD's and DuPPa I2CEncoder V2.1.
• Hardware serial I/O header for GPS or other
  • RX/TX from Teensy 4.1 Serial6, + one additional I/O pin.  Could be used for GPIO
• 8 GPIO pins on 2x8 pin header
• Ethernet connector
• USB Host port connector