Analog Input minimum current? - Arduino Forum
Apr 13, 2010 · The effect of this is that the input to the analog converter takes a bit longer to get to its 'true' value. If the signal changes slowly, there isn't a problem. The Arduino is set up to sample at roughly 10K sampes/second, so assuming the signal varies at much less than 5KHz (Nyquist frequency), there shouldn't be a problem.
+-10V Analog input - Interfacing - Arduino Forum
Oct 17, 2010 · Hi guys I have just received my Arduino Mega board, and am starting on my first project. My first question (many more will follow I am sure) is the best way to interface to a +-10V analog signal (from a CNC controller) I was thinking of using opamps to send a 0-5V signal to one analog input for the "Positive" side and then another 0-5V input for the "Negative" side of the analog signal, but I ...
How to scale analog input values? - Programming - Arduino Forum
Apr 1, 2015 · Input voltage 0 to 5 volts at an analog pin gives value read at the pin of 0 to 1023. But in my application only 50 to 800 is useful. I would like 0 volts to equate to 50 and 5 volts equate to 800 with linear scale between those values.
Analog input, always giving a value - Arduino Forum
Jan 13, 2013 · Am a bit fuzzy here... Thinking of analog input between 0 and 1024, now, when uploading following code to my arduino: int analogPin = 0; // potentiometer wiper (middle terminal) connected to analog pin 3 int lightPin = 9; // outside leads to ground and +5V int val = 0; // variable to store the value read void setup() { pinMode( lightPin, OUTPUT); Serial.begin(9600); // setup serial } void loop ...
Reading 4 analog input for Arduino Uno
Apr 12, 2020 · Just as an example if I wanted to read voltage from Analog Channel 0. int sensorValue = analogRead(0); // Convert the analog reading (which goes from 0 - 1023) to a Voltage (0 - 5.0 Volts): float voltage = sensorValue * (5.0 / 1023.0) - 0.00 ; If I wanted more channels I could use sensorValue1, sensorValue2, sensorValue3 ...
Need More Analog Inputs - Sensors - Arduino Forum
Apr 29, 2016 · There are so many more possibilities. For example using a single analog input and digital pins to power the LDRs one by one. It might require a little extra delay. About 16 LDRs could be connected to a single Arduino Uno without …
analog input = digital output - Programming - Arduino Forum
Feb 10, 2021 · Hi Guys, I want to program this: when analog input has (around) 5V then digital output = HIGH , and this is connected to 330R + LED when analog input is 0V then digital output = LOW, so no led burning. I typed this: int myPin=A0; int redPin=7; // the setup routine runs once when you press reset: void setup() { // initialize serial communication at 9600 bits per second: Serial.begin(9600 ...
Analog input value - General Electronics - Arduino Forum
Oct 24, 2024 · I made my own wearable flexible sensor (flexible resistor) but I connected a 10k （1M）resistor and 5v and wanted to take a reading of the resistance of this resistor but the arduino analog inputs are like floating pins but the connection is correct does anyone fix this problem before？
Analog input, series resistor needed? - Arduino Forum
Jan 14, 2013 · One rule I've learned (the hard way) over the years with electronics is to never short! I'm about as far as you can get on being an expert on the Arduino and what it can take. I tend to put high-value resistors in series to begin with to avoid over-currenting anything. On an Arduino Mega, When placing a 2000 Ohm resistor in series with a 10k Ohm potentiometer's positive or ground leads, I lose ...
Analog input stability - Sensors - Arduino Forum
May 10, 2018 · Hello! I don't know if it's a topic about this open already. I was wondering how can i get rid of this variation of the analog input as you can see in the serial print bellow for this simple code for instance. Is it something physical (small variations of the V) or software, maybe something to do with the Voltage in my opinion.. Anyway what are your sugestions? /* ReadAnalogVoltage Reads an ...