The NCP1402 is a 5V Step-up DC-DC converter. This breakout board will accept voltage inputs between 1 and 4 Volts and output a constant, low ripple 5V output capable of sourcing up to 200 mA.
The Adapter, 16V @ 500mA is a economical power transformer that supplies 16V at 500 mA output.
6 Vdc, 1.5 Amp power supply with center positive polarity.
This Switching Power Supply brick offers 12V up to 3A DC from up to 240VAC input
This is a VERY common regulated 12 VDC 2000mA output power supply used for many common gadgets.