ARDUINO M509 Base Resistor TTL Logic Level Converter Module AMS1117 DC 5V to 3.3V Electronic Components Electronic Hobby Kit

On board DC 5V to 3.3V DC-DC Step-Down Power Supply Buck Module,IC AMS1117-3.3; On board 8 channels 5V to 3.3V(also 3.3V to 5V) Logic level converter,base Limiting resistor ; Arduino Breadboard friendly