The PL2303HX is a USB to UART TTL (Transistor-Transistor Logic) converter module that allows communication between a computer or other USB-equipped device and a UART device through a USB port.
The LM2587 is a 3A 30V DC-DC Boost is a fantastic tool for any Electronics toolbox or workbench, and is capable of converting input voltages of between 3.5V and 30V, up to an output voltage of between 4V and 30V.