Temporarily several pictures only...

Specification:

- control range from -95.5dB to +31.5dB
- step size 0.5dB/2.5dB
- two PGA2310 on board
- encoder input (1dB gains step)
- remote control (it learns commands from every RC5 pilot so we are not dependent from only one type)
- 2x20 display can be used (VFD or LCD)
- selector output (two types: 8 monostable relays, 7 bistable relays)
- every selector input can make different name ("TUNER, CD, DVD, PHONO...")
- XLR signals control (2PGA2310 are on the analog board)
- LCD contrast/brightness can be adjust from remote control
- woofer output or XLR balance (offset between both PGA2310 on the boards)
- optoisolation for analog stage
- mute

Documentation:

schematic diagram (analog part)
schematic diagram (microcontroller)