I found this tutorial at Usage | RGB LED Strips | Adafruit Learning System. I see that there is a pin on the arduino board in the figure named “9V.” On my Arduino Leonardo board, there is no such pin; rather, it is called “Vin.”
First, why does the figure apparently only have voltage coming from the Arduino board at only 9 volts to the pin on the RGB LED strip that requires 12V or above?
Second, since my Arduino Leonardo does NOT have a 9V pin—“Vin” is in the same place as the 9V pin in the picture—is it acceptable for me to connect the wire running from the 12V+ pin on the LED strip to the “Vin” pin on my Arduino Leonardo? If so, how many volts and amps can the “Vin” pin safely handle?
If I were to attach a power source to the “Vin” pin, could my board safely operate with an input from a 12V 2800mAh battery?
Thanks for considering my questions.
P.S. The picture from the Adafruit tutorial is attached.