电子琴程序,硬件 p2.6经过两个三极管9013放大 接上一块小喇叭--Piano program. Hardware p2.6, amplified by 2 triode 9013, then connected with a small speaker.

三极管开关特性以及相关应用的介绍，希望对各位有用-Transistor switching characteristics and the introduction of related applications, you want to be useful

数控低压电源程序，使用12864显示，9013调整。-NC low voltage power supply, the use of 12864 show, 9013 adjustment.

电子琴程序,硬件 p2.6经过两个三极管9013放大 接上一块小喇叭--Piano program. Hardware p2.6, amplified by 2 triode 9013, then connected with a small speaker. -Piano program. Hardware p2.6, amplified by 2 triode 9013, then connected with a small speaker.