电子琴 1、具有发出C大调为标准音１２３４５６７和７八个音的功能。 2、设计完整的原理图电路，包括时钟电路、复位电路以及键盘接口电路等。 -Keyboard 1, with the issue of C major, 1234567 and 7 for the standard pronunciation features eight sound. 2, a complete schematic circuit design, including the clock circuit,