A motherboard may be adapted to selectively implement one of two different memory technologies. This drive device of a liquid droplet discharge head is provided with a piezoelectric vibrator 20 that extends and retracts according to a predetermined drive waveform, a drive control circuit 10 that functions as a drive control unit, and a drive wave generation circuit 30. The plurality of electrically conductive portions is configured both to collect current from a first solar cell and to interconnect electrically to a second solar cell. The first array of light emitting units andor the third array of light detecting units are manufactured based on standard semiconductor manufacturing processes.