The signal-processing tag has no usage guidance.
0
votes
1answer
14 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
32 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
59 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
20 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
50 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
128 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
46 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
54 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 ...
0
votes
0answers
86 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
2answers
266 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
191 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
1answer
476 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
86 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
57 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
364 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
158 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
179 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 ...
2
votes
4answers
1k 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
85 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
1k 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 ...
7
votes
4answers
5k 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 ...
