DDS controller development setup. DDS-60 unit is in the upper left hand corner. atmega32 processor board in the lower left hand corner. To the right of the processor is a 4x4 keypad, rotary encoder with knob, and current limiter for the LCD back light. Above is a small speaker and 16x2 LCD with LED back light. The speaker is to sound a 'beep' when a key is pressed on the keypad. Off screen to the right is a 12 volt power supply.