Product Model: OKY3409
FTDI USB Serial Module USB TO TTL FT232 Program Downloader For Arduino
Product Description
This module provides users with alternatives of power supply
module. Three solder joints in the diagram below, the bottom one is
for 5V, upper one for 3.3 V. Users can choose power supply
according to corresponding USB’s power supply voltage. Just weld
it on with soldering iron. USB to serial port can be used together
with mini. Mini plug is converted to corresponding
pins module, you can then upload arduino program to mini.