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Uno Flash

Uno Flash

Arduino UNO Tutorial 1 - Flashing LED This Arduino UNO Flashing LED tutorial is a basic 'Introduction to Arduino' tutorial and shows how to simply flashes the LED that is on the Arduino UNO board. The Arduino UNO already has an led and resistor connected to output pin 13, so we will use that. No other components are required. UNO is a fun online card game for 1 player. Play the super popular game UNO online with your best friends or versus the computer. For those who don't know the rules: you start with 7 cards. You must match the number or color of the card on the middle, leaving one on top of it. If you can't match it, you pick one card.

The power pins are as follows:

Uno Flash Cards


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Uno Flash Card Game

  • Vin. The input voltage to the Arduino/Genuino board when it's using an external power source (as opposed to 5 volts from the USB connection or other regulated power source). You can supply voltage through this pin, or, if supplying voltage via the power jack, access it through this pin.
  • 5V.This pin outputs a regulated 5V from the regulator on the board. The board can be supplied with power either from the DC power jack (7 - 12V), the USB connector (5V), or the VIN pin of the board (7-12V). Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board. We don't advise it.
  • 3V3. A 3.3 volt supply generated by the on-board regulator. Maximum current draw is 50 mA.
  • GND. Ground pins.
  • IOREF. This pin on the Arduino/Genuino board provides the voltage reference with which the microcontroller operates. A properly configured shield can read the IOREF pin voltage and select the appropriate power source or enable voltage translators on the outputs to work with the 5V or 3.3V.