What does declaring a pin INPUT or OUTPUT actually do?
May 12, 2024 · The Arduino IDE provides digitalWrite () and digitalRead (), addressing the output register and the input register respectively. Some programmers opt to use the port pin as memory bit …
if (pin = HIGH)... - Programming - Arduino Forum
Mar 12, 2020 · arduino.cc digitalRead () - Arduino Reference The Arduino programming language Reference, organized into Functions, Variable and Constant, and Structure keywords. To make the …
Maximum Current/Voltage into an analog pin on an Arduino Uno
Feb 12, 2011 · 7-12V is the maximum input voltage you can apply to the external DC input power jack. The analog input pin voltage is limited to 0V-5V. Anything outside that range will damage your …
can I use pin 13 as an input - Programming - Arduino Forum
Nov 22, 2015 · On the official Uno, the pin13 LED is buffered with an opamp, so you can use pin13 freely. On many boards though, the LED is just connected directly to the pin, and the load from the …
Using digital pin 0 and 1 just like any other Digital Pin ... - Arduino ...
Jun 3, 2017 · You would be able to use pin 1 as a GPIO pin, however you cannot use pin 0 as a GPIO, this is because the arguing has TX/RX pins that are used to program the Arduino and connect to …
Input protection - General Electronics - Arduino Forum
Apr 21, 2019 · Having had customer send near 15 volts through the input pins of the device, I was on the search for proper input pin protection for such scenarios. i started off with this circuit (multisim file …
Confused: PULLUP vs PULLDOWN? And, the effects! - Arduino Forum
Aug 4, 2018 · So, why set the pin as pullup, pinMode (interruptPin, INPUT_PULLUP)? Surely this should be set as pulldown? Does this line specify the function (ie to act as a pull-up switch) or does it set the …
[SOLVED] same digital pin as input and output - Arduino Forum
Jan 2, 2012 · I want to use the same digital pin on an arduino (mega) as an input with a switch and as an output with an LED, both "at the same time". By "at the same time", I mean that the pin would be …
How does on 'Input' pin work? (beginner question) - Arduino Forum
Sep 2, 2017 · - General Electronics - Arduino Forum . My question is this: When a pin is set to 'input', does that literally mean current (conventional flow) is flowing 'in' to the pin? I.e., is this 'input' pin …
How to set a input pin low? - Programming - Arduino Forum
Sep 1, 2021 · A lot of questions… What Arduino? Pin 1 is part of the default serial port on a UNO and equivalents. Seeing the whole code, the schematic, and a description of what you are hoping to do …