What is the maximum voltage level that can be read by any digital pin in Arduino Uno without damaging it?
Warning: Unlike most Arduino boards, the Arduino Due board runs at 3.3V. The maximum voltage that the I/O pins can tolerate is 3.3V. Applying voltages higher than 3.3V to any I/O pin could damage the board.
Can Arduino output more than 5V?
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. So answering you question: yes you should have supplied 12v on Vin.
Can you use two Arduino pins in parallel?
Even if you put two pins in parallel, you are basically halving the current between the two, but assuming 8mA peak, that is still 4mA each, and that is roughly 0.2v lower than VCC. You would need a few pins in parallel, which might lead to a higher risk than you want and taking up multiple pins for no good reason.
What does low mean on an Arduino Uno pin?
LOW means that the voltage on the pin is 0V. HIGH means Vcc, which is 5V here for Arduino Uno. Before you can actually use a digital pin, you need to configure its mode. A digital pin can either be on INPUT more or OUTPUT mode.
Can a digital pin be read by an analog pin?
If the pin can read any value between 0 and 5V, then it will be able to read just values below 0.8V (LOW) and values above 2V (HIGH). To use an analog pin as a digital pin, you simply have to set the mode for the pin, as you would do for digital pins in the setup () function of your Arduino program.
What is the value of an Arduino input pin?
Thus, the value you get when you read data from an analog input pin is between 0 and 1024. Coming back to our 2.5V example: 2.5V is 50% of 5V (Vcc). In your Arduino program, you will then get the value 512. From this value, you can easily reverse the computation and get the information about the voltage that was applied.