Arduino 7805 - 5V - 7805 voltage regulator - Boutique Semageek
7805 5V 1A Voltage Regulator is a LOW DROP Voltage Regulator able to provide up to 1A of Output Current at a fixed 5V output voltage.
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Standalone Arduino. Brian W Evans Page 254 of Tom Igoe's Physical Computing has a nice layout of a 7805 voltage regulator with a couple decoupling capacitors.
Banggood Product reviews: 10Pcs L7805 LM7805 Three Terminal Voltage Regulator Module For Arduino Reviews
How to let your Arduino go to sleep and wake up on an external event. For example, the Arduino serial and USB boards use a 7805 type of power regulator.
Replacing the Arduino voltage regulator. I would connect the 7805 output pin directly to where the AMS1117 output was (middle pin, large solder pad. )