Mainboard for 80c552-Board

As central controller for my digitally controlled preamplifier I use the 80c552-board. For this board I developed a mainboard, which supplies all necessary functions for the preamplifier. Of course, this board can also be used for other projects, even when the connections are optimised for my amplifier.

The mainboard has the following building blocks:

• Connector for a graphic LC-display
• RS232-connection
• EEPROM
• RC5-interface for IR remote controls
• Realtime Clock
• Switched outputs
• Opto-decoupled outputs