The IRF840PBF is a 500V 8A 125W TO220AB Package Third generation power MOSFETs from Vishay provide the designer with the best combination of fast switching, low on-resistance and cost-effectiveness.
The TIP125, TIP126, TIP127 is a 100V 5A 65W (PNP) Plastic Medium-Power Complementary Silicon Transistors. The devices are manufactured in planar technology with “base island” layout and monolithic Darlington configuration.
This is a DC-DC Step Up Red Color Boost Module with enable high-performance step-up switching current (BOOST) module. The module uses the second generation of high-frequency switching technology LM2577.
The BC548 is a NPN transistor hence the collector and emitter will be left open (Reverse biased) when the base pin is held at ground and will be closed (Forward biased) when a signal is provided to base pin.
The DC5V 2 Channels Relay Module is similar to the 4-channel version but with two relay channels. It is suitable for projects requiring the control of two separate high-power devices, providing a reliable interface between microcontrollers.
This is a 3.3V to 12V Mini DC-DC Boost Step Up Converter Board Module 5V/ 8V/ 9V 12V Output is a DC-DC Boost step-up converter module that is used to step up the voltage.
The HW-483 is DC5V 6mm 650nm Red Color Laser Diode Module For Arduino Very Easy To Use, Do controllable laser pointer, theft detection, etc. interesting application devices.