This is my second try at building on perfboard.

Schematics

• Schematic
• Fritzing

Resources

• amedes/pico_tnc: TNC for Raspberry Pi Pico
• Arduino KISS TNC.pdf
• Arduino KISS TNC
• The WhereAVR on garydion.com
• mobilinkd/tnc1: Mobilinkd TNC1 Firmware
• MicroModem
• Microview Arduino TNC by taner.schenker
• ADX – Arduino Digital Transceiver
• OpenModem
• How To Read Capacitor Code Value
• Teensy®++ 2.0
• Pico-R3-A4-Pinout.pdf