The NE555 is a square wave pulse generator module can be used to produce square wave signals for experimental development or in applications such as driving stepper motors, and as an adjustable pulse generator for microcontroller.
The SI-9945DY, SI9945, 9945 is a N-Channel Dual MOSFET 60V 4.3A 2W 58mohm 10V Enhancement Mode MOSFETs are produced using advance process that has been especially tailored to minimize on-state resistance and yet maintain superior switching performance.
It is a small built-in vibration motor Module. After input 5V current, you can control the ON / OFF or vibration intensity of the motor By digital signal or PWM signal.
The HW-040 Rotary Encoder Module is a device that generates an electrical signal based on how much the rotary input device (knob) is rotated and the direction it is rotating
The FS10KM-06 is 60V 10A TO-220F Package High-speed Switching Power MOSFET. Drive Voltage 4V VDSS 100V rDS(ON) (max) 10A Integrated Fast Recovery Diode.