Questions tagged [analog-sampling]
In signal processing, sampling is the reduction of a continuous-time signal to a discrete-time signal. A common example is the conversion of a sound wave (a continuous signal) to a sequence of samples (a discrete-time signal). A sample is a value or set of values at a point in time and/or space.
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Digital input pin voltage treshold (voltage to register 1 or 0)
I was thinking of using multiple analog light sensors (variable resistance by light), but basically I only need to know if there is "a lot of light" or "not a lot of light". And would like to use ...
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Sampling Rate of Arduino Uno
It might be a stupid question but, I am currently using Arduino Uno with the 16MHz processor, what is maximum sampling rate of data available to me if I want to read data of a sensors such as ...
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Help with a rather specific implementation of FFT Library?
So, I guess what I'm trying to do here is properly understand the FFT library posted here by Open Music Labs, done in C++. I believe I understand the Fourier transform, but the FFT has some nuance ...
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Integration of signal
In my house, I have a low voltage AC signal (0-10V) that is proportional to the amount of current that is drawn at any moment (or as it is presented: kW) (europe, 50Hz). Presently, it is just shown as ...
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Analogue input 0 staying at 0 when sensing light with Arduino and a photocell
I am doing a circuit for capturing light intensities.
I followed the tutorial provided by Adil Moujahid
Yet, when I plug the jumper wires on 5V the circuit stops working and when I plug on 3.3V the ...
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Arduino Due: Interrupt-based ADC hangs processing
I am trying to build an oscilloscope using an Arduino Due and an LCD. I have the LCD running perfectly and started working on using the ADC peripheral to sample signals. Here's what I have so far:
#...
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Connect HX711 to a three wire load cell
I have the following load cells:
I'm using the following HX711 amplifier
Every guide i can find on the internet describes how to connect a load cell with four wires to the amplifier. How can i ...
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Getting values from multiple thermistors - one value glitches all over the place
I have a circuit with preferably long wires that get data from thermistors. The Arduino sends this data (formatted in JSON) to a web server where it can be collected by another program.
Some of these ...
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Arduino Uno - Analog Circuit Simulator
I control an analog circuit with Arduino Uno. I want to simulate an Arduino Uno with operational amplifiers (741). Can I simulate Arduino with SPICE?
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Arduino Micro + Max4466 - Noise on A0
I've got an Arduino Micro, and a MAX4466 ECM / AMP breakout board (https://www.adafruit.com/product/1063). I'm powering the Arduino Micro from the USB port.
On the MAX4466 (to the Arduino), I've ...
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Can do I make an Arduino program that can decipher telephone touch tones?
I have an old land line phone that I want to connect to my Arduino. Then I would like to write a program that can decipher the touch-tone button presses (which are a combination of two tones) so that ...
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0-1 V input to 0-5 V Output
We have an instrument that has analog output of 0-1 volts and we need to convert this to 0-5 volts. What is the best op amp to use for this and how should the resistors be set up? Any help would be ...
Paul
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Arduino AD-converter tolerance
I created a quite simple Arduino sketch:
void setup() {
Serial.begin(9600);
}
void loop() {
int sensorValue = analogRead(A0);
Serial.println(sensorValue);
float voltage = sensorValue * (5 ...
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