Use this tag if your question is related to signal processing techniques (within the Arduino's capability).
0
votes
2answers
36 views
Arduino audio frequency reader
I have a simple project for my arduino : light some leds when i send a certain frequency from my smartphone through the jack output . For example ,
I play a simple audio file generated with a ...
0
votes
1answer
74 views
Digital Band pass filter on Arduino
I am working with sensors on Arduino and would like to filter the sensor's output to a certain band of frequencies.
I found many examples online on how to implement simple digital low-pass filters in ...
-1
votes
1answer
39 views
Does Atmega-2560 support image processing capability? [closed]
As the title says can I perform image processing on Atmega-2560?
Basically I have to capture real time images and detect green or red color.
I have not thought of the frame rate but it is not that ...
0
votes
1answer
43 views
Get pin input status without using the arduino library
I am not allowed to use the Arduino Library (or any Library) for this program. How would I check the input of a pin?
I found two different functions:
In Arduino.h:
#define bitRead(value, bit) (((...
2
votes
3answers
49 views
Sum values, store them and print the last value
I have a mass flow meter connected to an Arduino Uno board. I have managed to read the volume flow in L/hour, but now I'm struggling to implement a code that stores the values so that I see the number ...
0
votes
1answer
37 views
Trying to read analog signal with digital pin using outside ADC
Is there a way to route an analog signal from a simple temperature sensor through an ADC, MCP3008, into a digital pin. I have used all the analog pins on my Arduino Mega 2560 and am trying to utilize ...
1
vote
0answers
47 views
Real time Cross Correlation…? [closed]
I saw the one of your Answer that dated the 13th May 2015, i want to cross- correlate the vibration signal (with Predefined Signal) to remove the unwanted signals.But i want to do that real time so ...
0
votes
1answer
151 views
How to properly receive data from accelerometer @ arduino in processing and map it?
I'm busy making a project where my accelerometer @arduino can controle a ellipse @processing
But the problem is, it doesn't work. With the code I have now, I can receive the data from the ...
0
votes
4answers
2k views
How can I generate a sinewave with Arduino Uno?
I would like to generate a sine wave with my Arduino Uno. As far as I know, there is no library for Uno to generate such a signal (correct me if I'm wrong), so the only option available is to write a ...
1
vote
1answer
46 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 ...
0
votes
1answer
123 views
Producing a sine wave with the DAC?
Its being a few days i am trying to achieve something that I dont really know if possible.
Using the Samd21 chip(Arduino Zero), I am using a timer and a DAC to produce a sine wave.
The required ...
0
votes
0answers
69 views
Processing White Screen?
I'm new to using Arduino and I am trying to replicate this guide, Build a simple Transistor Curve Tracer using an Arduino and Processing.
I got my Arduino wired correctly with the code uploaded to ...
2
votes
0answers
55 views
Problem with biased circuit for oxygen sensor (SGX EC410) [closed]
I have designed a circuit for an SGX EC410 oxygen sensor by using these application note -PAGE 4, FIGURE 4 - (http://www.sgxsensortech.com/content/uploads/2014/08/A1A-EC_SENSORS_AN2-Design-of-...
1
vote
3answers
478 views
Connect function generator to Arduino
How do I connect a function generator that generates an analog signal to an Arduino Uno?
I don't know how to begin, so could you also tell me the settings for the function generator, e.g. its ...
0
votes
1answer
449 views
FFT (or similar) library for the Arduino
I'd like to build a "low fidelity" spectrum analyzer to run on an Adafruit Trinket Pro. My primary goal is to intrigue my seven year-old niece with something that can be hacked. The plan is to pick up ...
1
vote
1answer
174 views
Is it possible to create an interface between Teensy 3.2 and a DSP?
I realize that this is a forum for Arduino but since the Teensy 3.2 is compatible with the Arduino IDE I thought it would be appropriate to ask the question here.
Anyway, can I create an interface ...
0
votes
1answer
66 views
Looking for circuit diagram for evaluation of a pulsed signal
How can I evaluate a pulsed signal in Arduino? The signal comes from an car alarm system and is called (-) output 200 mA. Arduino and the car have the same GND. Can I attach the output through a ...
0
votes
1answer
304 views
Advice on setting up a real-time audio equaliser
First time Arduino user here.
We have a microphone set-up which feeds back loudly on particular frequencies and need an equalizer to (preferably automatically) detect spikes in particular frequency ...
1
vote
2answers
127 views
digitalWrite queued signals?
I have this simple code who send a signal to a android phone when I press a button:
const int botonPinD = 8;
const int relayPin = 12;
int retardo = 100;
int finBoton=1000;
void setup() {
...
0
votes
3answers
203 views
Integrating an analog signal using Arduino Due
I have an 2 analog signal, and I want to calculate the difference between 2 signals (A0 and A1), then integrate an analog, but it doesn't work (I just started studying Arduino).
Please could you show ...
0
votes
1answer
57 views
Arduino LED lighting up when signal is reading low on multimeter
My code is designed to play a tone when ever pin 3 is high on my Arduino. When I am examine the pins voltage with a multimeter it is always reading below 1 volt. When I examined the voltage off of a ...
0
votes
1answer
104 views
Signal sampling: losing data every 103 points when it is recorded in SD
I'm working on a system of acquisition and ECG datalogging with the Arduino, and I'm having the following problem:
I'm losing data every 103 points (just 103). No matter the sampling frequency to use, ...
0
votes
1answer
806 views
Arduino Cross Correlation?
How can I write lightweight cross correlation code for arduino? I couldnt find any solution. The measurement system contains an ultrasonic sensor and a servo that turns from 45 to 135 degree and ...
1
vote
1answer
73 views
Making a composite waveform using a single TIMER interrupt
I'm writing software for a laser tag gun, which under the system we use needs the output waveform to be a carrier wave of 57600Hz with a signal wave of 1800HZ for about 50ms
Using the Tone library (...
0
votes
2answers
107 views
How do I send an IR signal from an Arduino
I want to send a generic (not Sony, etc.) remote's signal from my Arduino. I have already used a IR decoder program to capture the timing of the signal:
int IRsignal[] = {
// ON, OFF (in 10's of ...
1
vote
0answers
206 views
Which components to built remapping keyboard via USB in + out (remapped)
I know that it's fairly easy to change the emulate keyboard and mouse by Arduino. But I'm quite specific about the goal I would like to achieve hence I would appreciate if you could advise me which ...
0
votes
3answers
898 views
How to generate Chirp Signal using Arduino
i would like to generate Chirp Signal (Frequency Sweep) using Arduino. i have searched a lot in internet but didn't find anything.
Basically, any parameters is also ok. But the concept is what i am ...
3
votes
1answer
377 views
PWM signaling with Arduinos: What is the reason for the ground connection?
This may sound like a very dumb question and I apologise in advance.
I've gone through reading about PWM and working on some example sketches to control PC fan speeds using PWM and Arduino.
In all ...
0
votes
2answers
2k views
Sniffing RF signals
I am using an Arduino UNO and an RXb6 (I would link to the data sheet if I could find one) to try to decode a RF Signal that controls a remote outlet. I have the devices connected as you would assume ...
0
votes
1answer
157 views
Using Arduino audio to control an LED light
I am looking for a way to control an LED on a circuit board using audio input for learning purposes.
I have written my own speech recognition system using dynamic time warping in Python, but I would ...
0
votes
1answer
88 views
How to Segment Accelerometer Signal at idle points
I'm using an 3 axis Accelerometer(GY-521) to get the acceleration data and also the gyroscope to get the gyro data. I want to segment the signals at the idle points so that i can get the segmented ...
0
votes
2answers
2k views
Necessary sampling rate
I'm using an Arduino pro mini to receive the analog signals from three sensors. I was wondering what sampling rate I should sample at in order to properly represent these signals. I know it should be ...
1
vote
1answer
304 views
High frequency audio sampling and storage
I want to use an arduino duemilanove atmega168 for audio signal processing. I can sample the signal at around 38.5kHz using this code. I want to send the sampled data over the serial to a computer for ...
0
votes
2answers
406 views
How to process this XBee analog pins signal?
I'm new to XBee and a colleague setup a sender/receiver pair. I'm using an usb breakout and reading the values using this java XBee API in Processing/Java.
The issue I'm having is two of the pins(...
4
votes
4answers
2k views
How useful could the Arduino Yun be in computer vision in a robotics project?
I've recently ordered an Arduino Yun and several other components to begin on a small robotics project (based on an old 4x4 RC Truck). Although not mandatory for what I'd like to do, I was wondering ...
1
vote
0answers
92 views
Frequency will not change
I am working on a project where I am trying to get an input signal filtered according to its frequency. I checked the signal before it went into my DSP algorithm to see where the problem was and I ...
2
votes
3answers
3k views
How can I filter out noise from ADC lines without delay or signal change?
I'm working on a project with a joystick and I'm trying to keep everything a simple and low latency as possible. I am reading the pots with the onboard 10bit ADC on the ATmega 32u4 but may be ...
10
votes
4answers
12k views
Are there any signal smoothing libraries for Arduino?
I am working on a mobile robot controlled via a wireless 2.4 GHz link.The receiver is connected to the Arduino Uno which serves onboard as the main controller. The most critical (and main) input ...
