J-USB
USB-B
Connector
USB Type-B, through-hole
USB / programming port
About this component
Connects to the ATmega16U2 and supplies 5 V when no barrel-jack supply is present. The USB 5 V passes through a 500 mA resettable fuse (F1), which protects the computer's port from a short on the board. If USB power is missing, check the fuse and the through-hole joints of the socket.
What it does on this board
USB type-B connector for power and programming.
Pinout & readings
No pinout or reference readings yet — these show what each pin does and what a healthy part should measure.