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What is the reference voltage that the Arduino Due uses to read write from the I O pins?
3.3V
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.
HOW FAR CAN 4-20mA signal wires be run?
20G conductors at about 12 ohms per 1000 feet (about 330m) means that 450 ohms of 20G conductor could be support 4-20mA as far as about 18,750 feet, about 3.5 miles or about 6km.
What should the wire length be for Arduino?
If you use an Arduino pin directly wire resistance and inductance will start to matter as range increases. At 300 baud you can achiever hundreds of metres with twisted pair cables. As range increases aspects like cross-talk from the other circuit and external noise increase in importance.
How does an Arduino input and output work?
Pull-down resistors pull the pin LOW when the switch is open, and pull-up resistors ensure that the input pin will read a HIGH state in such a case. LEDs can serve as a simple output method for communicating information to a user. The Arduino can control an LED by pulling one of its digital pins HIGH or LOW.
How is the led connected to the Arduino?
The LED is connected to a digital output of the Arduino. This pin might either be in a HIGH state, where it outputs 5 V, or it might be LOW, where it has the same potential as GND. By changing the state of the digital pin, the LED can be turned on and off. Using switches and buttons for simple user-input
How are Arduino pins connected to the circuit?
How you intend to connect to the circuit – direct Arduino pins, high/low buffer, differential drivers, If you use 5V/0V “unipolar” then at say 9600 baud you can get many metres with suitable drivers. If you use an Arduino pin directly wire resistance and inductance will start to matter as range increases.