AC / DC 5V 1A Power Adapter Center Positive
These are switch mode power supplies which mean the output is regulated to 5V (no more 14V outputs!) and the capable output current is much higher (1000mA!).
These will power most projects that don’t require more than 1000mA of current. Center-positive 5.5x2.1mm barrel connector.
Works with 100-240VAC inputs.