2x 220V ein
2x 220V aus

1+GND Lüfter intern
1+GND Lüfter extern

1+GND Temperatursensor
1+GND Lichtsensor (on board)

2+GND 15~ ein

2+GND I2C -> TDA7300
4+GND line-in sniffer
2x    ±12V stand-by power out

5V+GND Volume Control
3      Volume Control switches
3      Volume Control LEDs: SDA, SCLK, /OE

5V+GND Vacuum Fluorescent Display (VFD)
3      Segment control: SDA, SCLK, /OE
+25V   Anode voltage (denk…)
+3.7V  Cathode Filament heating voltage (denk…)