A standard Arduino function for detecting the voltage on an analog pin via ADC.
1
vote
2answers
28 views
How to I press a button once to display text and again to remove it?
My code is displaying voltage and I want to have a button that when pressed it displays a text and when I pressed it again it would turn off the text. I put the word "YES" just for a test
float vPow =...
0
votes
0answers
14 views
Arduino Due: ADC gain adjustment problem
I want to increase gain of the ADC channel. To achieve this I'm using adc_set_channel_input_gain function from adc.h. Here is the entire sketch:
const byte aPin = A6;
void setup() {
...
0
votes
2answers
16 views
Custom ISR triggering function/value
Is there a way to write a custom function which would be the mode/reason to trigger an interrupt. I have an analog joystick connected to my arduino analog pin. It reads a value of 689 on one end and 0 ...
1
vote
0answers
16 views
How to use Honeywell NBP Series Sensor with Arduino
I am trying to use HONEYWELL NBPDANN100PAUNV Pressure Sensor.
I found a example here http://www.circuitstoday.com/interfacing-pressure-sensor-arduino
As this example says as instrumentation ...
0
votes
1answer
42 views
10 bit PWM on Arduino UNO
I am using this code to make 10 bit PWM on port number 9, it seems like everything printed is 0,1022 rather than printing 0, 512, 1023. Is there a problem in my code ?
I wired pin9 to A3 to get the ...
0
votes
1answer
28 views
Use digital pins as analog - Arduino Micro
I have an Arduino Micro and I want to use pin 6 and 8 as an analog pin, according to the manual this is possible:
The Micro has a total of 12 analog inputs, pins from A0 to A5 are
labelled ...
1
vote
1answer
24 views
ADC port manipulation
I was modifying this ADC Touch implementation, namely switching analogRead and pinMode to what I thought would be port manipulation equivalents.
I get very different readings (better and more stable ...
1
vote
2answers
42 views
How to analogRead() 2 seperate pins simultanously
I am trying to create a simple piano playback using a flex sensor, proximity sensor and a piezzo buzzer.
I want to have it so that when the flex sensor is triggered, a sound is played on the piezzo ...
0
votes
1answer
50 views
Problem with simple sound detection circuit using microphone
I am very new to this community . My first project with Arduino was using a LDR( light dependent resistor) in a circuit like this:
The input i got was as expected between 0 - 1023.
I then tried a ...
1
vote
3answers
93 views
AC meter By ADC timer interrupt from Nick Gammon
I want to read ADC from the pin A0 and A1. I have written in this code, however.
I took this code came from Nick Gammon
Thank You
///////////////////////////////////////////////////////////////////...
0
votes
1answer
37 views
arduino pro mini analog pins read different values
i need to read a voltage with an arduino pro mini using the analog pins.
I created this simple test code:
int sensorValue;
float voltage;
void setup() {
Serial.begin(9600);
}
void loop() {
...
1
vote
1answer
29 views
Get an additional analog pin?
I have the following board:
As far as I can tell, there's only a single analog pin (A0). But I need at least 2 additional (for 3 total).
Is there some way to fake analog input on GPIO pins?
0
votes
0answers
28 views
Minimum current and voltage levels required for an analog input pin to operate
What are the smallest values of current (mA) and voltage that an Arduino UNO analog input pin can possibly detect?
1
vote
1answer
27 views
Getting the highest value from analog reading?
I am doing a project using an FSR (Force Sensitive Resistor), I'm currently reading values with no problem every 100milis. I want to output via Serial.print the highest value, I've read.
I am having ...
0
votes
1answer
50 views
Advanced ADC setup on Due (SAM3X8E) to increase precision
I want to make some precise measurements with Arduino Due. Although I'm using very good external voltage reference (LTC6655) measured data is still jumping around, especially significant when I'm ...
0
votes
2answers
92 views
Cheapest and easiest Arduino board for 12 bit ADC, thinking of M0
I need an Arduino board for simple ADC, but 10 bits of resolution is sadly not enough. I am going to buy a board with 12 bits of resolution, but really couldnt decide on the exact model. It needs to ...
0
votes
0answers
42 views
I have a sensor but it doesn't respond
For those who think: TL;DR long story short:
I want to measure the voltage output at certain temperature using arduino but do not get a signal.
Not sure if it belongs here, but you folks know a lot ...
0
votes
2answers
83 views
AnalogRead(0) always returns 0 on RFduino
I'm using RFduino to do analogRead at pin 2 and pin 0. Pin 2 works perfectly, and I got the result. However, for pin 0 it returns all zero.
#include <RFduinoBLE.h>
static const int topPin = 2;
...
0
votes
1answer
66 views
AnalogRead from voltage divider ladder
I'm building a MIDI guitar, using an Arduino, sound synthesising and wood.
To properly know which note I'm pressing, I built a voltage divider with 12 equal resistors (10K). One side is connected at +...
0
votes
1answer
14 views
Why so different not connected analog inputs?
I took just Arduino Uno board, connected Ethernet Shield to it and compiled Web Server example. And it works.
But it outputs:
analog input 0 is 1023
analog input 1 is 1023
analog input 2 is 789
...
1
vote
2answers
160 views
A question about resistance measurement with arduino
Lately I was asking myself about the posibility of measuring a potentioneter resistance with arduino, and my questions are:
1) Is it possible?
2) if it's possible, what kind of restriction the ...
0
votes
1answer
27 views
Uno R3's a4 and a5 not working after installing itead SD Shield 3.0
I'm working on a data logging project and would like to use all six analog inputs on my Arduino Uno R3. I've been able to get everything working, including writing to the SD card. However, with the ...
0
votes
0answers
22 views
Knock Sketch not working
I have a piezo sensor connected in accordance with the schematic as shown in the Knock example sketch. Knocking fails to trigger the unit. I have tested the analog port using the AnalogReadSerial ...
0
votes
1answer
192 views
analogRead() takes >400 us on Arduino Zero but ~100 us on Uno, why?
I've been trying to figure out why the analogRead() function takes about four times as long on an Arduino Zero than on an Uno, when the Zero has a faster clock than the Uno. Arduinos website says ...
0
votes
3answers
114 views
Change max and min read value of potentiometer
I'd like to know if there is a function or some way to define min and max value to potentiometer, for example: I'm using a mechanical part that only tour the potentiometer a little bit, what means the ...
1
vote
0answers
38 views
Arduino Robot motors disabled when AnalogInput is connected
I have attached a solar panel to the Arduino Robot, connecting the - to the TK3 Input GND, and the + to the TK3 Input Analog Pin. I want to turn the robot around and "scan" the voltage. But the motors ...
0
votes
2answers
115 views
Using micros() to measure analogRead() time varies based on Serial.print location?
I'm trying to use micros() to measure the time it takes to execute an analogRead() cycle, but am having some issues. Originally, I just printed out the measured time for the analogRead() right after ...
1
vote
1answer
32 views
How can I get analog-in reading from Digital-PWM-out on the same board?
I have a wire going from PWM4 to A0 but I don't dare turn on my Arduino Mega in case this is incorrect.
PWM4 will eventually go to an analog device but I want to make sure the read value is what I ...
0
votes
1answer
42 views
PWM output voltage too high
I'm experimenting with PWM with the code below, but (according to my analog multimeter) the voltage on the output pins reach up to 5V whilst the largest analogRead(IN1) value is only around 700:
...
0
votes
1answer
88 views
Sharp GP2Y0A710K0F IR sensor behaving strangely
I have just purchased a new Sharp GP2Y0A710K0F IR sensor online. As a sanity check, I wrote this simple code to check if the sensor is working correctly. The code is expected to print output voltage ...
0
votes
1answer
28 views
Serial.println not outputting
I ran the following really simple code on my micro and the monitor is just blank, not displaying any zeroes or anything and the Tx light isn't lighting up. I haven't used analog inputs much so I don't ...
1
vote
1answer
39 views
how do you capture the top value in a fallen edge in analogs data (flex sensor)
Guys i'm working with a flex sensor and I'm trying to capture a specific value which is the moment before the user lets go of a flexed flex sensor and its represented as the top point of a falling ...
1
vote
2answers
80 views
What is the sampling-rate of the `analogRead()`?
I am about to Fourier analyse some data I've taken, but i need to know at which sampling rate the data was written to the serial monitor. I've found a lot of threads about how to increase it and such ...
0
votes
1answer
39 views
How to interpret analog values sent to Arduino from line scanner?
So I have a line scan camera attached to my Arduino Mega and I'm trying to send it a digital clock impulse and get an analog output back. The line scan camera is supposed to return 128 pixels.
So far ...
-1
votes
2answers
101 views
IF, ELSE IF functions not working with analogRead
not sure what is going wrong in the code below, but it's a simplified code of a larger piece I'm trying to debug. I notice that the code seems to skip to the else statement even though the if ...
1
vote
2answers
125 views
Why is my potentiometer giving strange reading?
I have a 10kOhm linear Potentiometer. I connected it to analog 0, as in https://www.arduino.cc/en/Tutorial/Potentiometer.
The analogRead() gives a value between 0 and 1023, so I was expecting 0 if ...
0
votes
2answers
93 views
Driving Numerous Chips from 2 Separate SPI Connectors w/ Arduino Micro
I want to drive numerous chips (L9823, TLC5925, ADG1414, MCP23S08) from an Arduino Micro as well as read input from analog pins connected to momentary buttons, toggles, potentiometers and such. The ...
1
vote
0answers
57 views
Erratic readings on Analogread with low voltages
I am using Arduino Uno for measuring sensor voltages. I am using multiplexor to switch between different sensors. The readings measured in the range of 800- 900 mv are accurate, but at low millivolts (...
1
vote
2answers
138 views
When should you worry about interference affecting the analog input?
I made something that uploads the measured current to Thingspeak. Everything works, but i did not place the DC to DC converter on the board because i was worried that it would interfere with the ...
5
votes
2answers
88 views
Practicality of recording speech
Is it practical to record speech with the Leonardo?
I want to record speech via a MEMS microphone and stream it over a serial connection to a Raspberry Pi for speech-to-text processing.
This article ...
1
vote
1answer
198 views
Maximum potentiometer resistance
I want to hook up a potentiometer to my arduino (Leonardo) as a voltage divider with the middle pin to an analog pin. I want to use the highest resistance to save power. I looked on the datasheet and ...
3
votes
1answer
132 views
LM335Z temperature sensor gives very varying values
I'm trying to get consistent values from the LM335Z temperature sensor. But it behaves very strange.
I'm using an arduino nano and it's powered via USB from a Raspberry Pi. The circuit also has two ...
0
votes
3answers
142 views
Getting the average of sound in last minute
I am reading sound input every 60 seconds and I would like to calculate the average of sound during that period using non-blocking code; what should I do to change the way that I calculate it in ...
0
votes
2answers
180 views
Accelerometer axis inputs driving three RGB LED strips - Trinket Pro 5V
I am looking to take the analogRead Value of the x, y and z axis (at pins 0, 2 and 4) and if it's a motion state, perform a rainbow, cylone and cascade LED sequences using Adafruit Neopixel library.
...
1
vote
1answer
58 views
What will happen if I supply greater than 1.1V to analogue inputs if analogReference set to INTERNAL?
I am reading a 50Hz AC voltage using the analogue inputs.
If I set the analogReference() to INTERNAL, meaning 1.1V on the Arduino Uno, what will happen if a voltage greater than 1.1V is supplied to ...
0
votes
1answer
66 views
Arduino Mimicking Voltage Dividing Keypad / Matrix
Still very new to Arduino, so bare with me. I've been all over Google looking for ways to hack my alarm keypad. This is my first time using the Arduino to hack something :smiley-confuse:
The keypad ...
0
votes
0answers
34 views
Why does analog sensor “hum” when plugged into common ground?
I have the ground for an SD card module, LED, and piezo sensor all plugged into the same ground rail. When doing this I get a low "hum" in the piezo readings where instead of reading ground voltage (0)...
1
vote
1answer
86 views
How to wire and use a B10K linear LED potentiometer?
I've bought some nice looking LED potentiometers from Ebay. They look like this.
I'm very new to low level electronics/hardware and I don't know how to wire it. It has 4+2 pins.
Also, how to use it in ...
0
votes
2answers
1k views
Arduino: Read frequency of input from audio jack
I want to trigger an arduino from a sound from an audio jack from a mobile phone. The audio is a 1 Khz sound that the mobile will play. I want to avoid accidental triggering of the audio by testing ...
1
vote
2answers
512 views
Help Understanding FFT Analysis and analogRead()?
Here's the deal, I'm attempting to learn how to use an FFT (Fast Fourier Transformation) Library for sound analysis (link is here). My issue is that this comes with included C++ code to show users how ...
