This HEXFET® Power MOSFET utilizes the latest ID = 75A processing techniques to achieve extremely low on-resistance per silicon area. This design are a 175°C junction operating temperature, fast switching speed and improved repetitive avalanche rating.
The XL4015 is a Buck Converter DC DC Step Down Converter 5V-32V To 0.8V-30V 5A 75W. This product is a 180 KHz fixed frequency PWM DC/DC module, capable of driving a 5A load with high efficiency, low ripple and excellent line & load regulation.
The 2SC9014 2SC-9014 2SC 9014 C9014 is a NPN 50V 0.1A 0.6W 270MHz Transistor TO-92 Package Bipolar NPN Small Signal Transistor Electrical Circuitry and Parts
This is an Active buzzer is present inside with shock source, so as long as the electricity will call 2 Program control convenient, single chip microcomputer a high and low level can make the sound, and the passive buzzer is can not do.