Precise voltage measurement with an Arduino microcontroller
Short circuits on Arduino pins, or attempting to run high current devices from them, can damage or destroy the output transistors in the pin, or damage the entire Atmega chip. Often this will result in a pin in the microcontroller but the remaining chip will still function adequately.
How To Use Arduino’s Analog and Digital Input/Output (I/O)
With 54 digital input/output pins, 12 analog inputs, it is the perfect board for powerful larger scale Arduino projects. This pin on the Arduino 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
Arduino’s AnalogWrite – Converting PWM to a Voltage
/24/2012The output transistors on Arduino pins have about 40 ohms resistance if I remember right - however they have an absolute max rating of 40mA current too, so any safe use of the output pin will produce 1. 6V or less for LOW and 3. 4V or more for HIGH.
Solved: Insufficient output voltage from arduino mega2560
/1/2015I am using Arduino Due to control BJT switch array. Schematic is as follow (attachment): I am able to get 3. 3v output voltage from Arduino. The problem is that once I connect it as schematic shows, the output voltage drops to 0. 6v.
Why does my Arduino Nano send the wrong voltage on a
Hello, my arduino mega2560 not providing sufficient out voltage. I checked all digital pins and the problem is same. The pin output is 4. 2-4. 5V,and this output is not sufficient for my load.
Arduino Uno Pin Diagram, Specifications, Pin Configuration
The arduino pro-mini board normally has six analog output pins which can be used to generate analog output voltage. The pins marked in the board as 3, 5, 6, 9, 10, and 11 can act as the analog output.
Arduino Digital Output Pin Voltage - Arduino Forum - Index
Arduino Uno is a microcontroller board based on the ATmega328P (). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header and a reset button.
Arduino Nano Pin Diagram, Features, Pin Uses Programming
Voltage limits on input/output pins: -0. 5 - +5. 5V max.  If you need to read in a voltage on an Arduino digital or analog input pin, ensure it is between 0 and 5V. If it is outside these limits, you can bring down the voltage using a voltage divider.