Changelog

Proteus 0.7

Reduce BOM lines somewhat, replacing similar components with identical components.
Add RTC/backup battery

Proteus 0.6

Switch to TLE9202 ETB driver due to shortage of TLE9201
Switch to STM32F767ZG due to shortage of STM32F42x

Proteus 0.4

knock sense with headset jack
SD card
USB removed from 23 pin connector

Proteus 0.3

first large batch
incompatible pinout change mostly on the 23 pin plug

Proteus 0.2

USB footprint fix

Proteus 0.1

it's alive!!!