All Questions
Tagged with analog-sampling arduino-uno
17 questions
-3
votes
1
answer
370
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Using internal voltage reference for sensor
i am using 3.7~4.2V lithium battery. I am using internal voltage reference to read constant battery voltage as we know that the battery voltage level depletes overtime. The problem is that my sensor (...
0
votes
2
answers
116
views
Is defining a function improves speed rather computing average for each analog input separately
My Arduino controller reads data coming from four different sensors. After the data is read, I individually compute four input average values. I understood that I am having the same lines of code ...
- 115
1
vote
0
answers
118
views
How to implementing timer interrupt with a sensor device using A0 and A1 pins
I was wondering if there is a way to program a timer interrupt to collect sensor data at a specific sampling rate?
I want to attach two strain gauge sensors to A0 and A1 pins and collect the data at a ...
- 71
1
vote
1
answer
198
views
Maximum frequency that can be converted with Arduino Uno?
Arduino Uno Board use successive approach ADC of 12 bits and 16 MHz frequency clock. What is the maximum voice frequency can be converted using arduino uno board? I want the step by step solution with ...
0
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1
answer
667
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Using Arduino to Record analog signals with SPI ADC + Sampling Rate Issue
I am using Arduino UNO to Read 8-channel, 24-bits resolution Analog signals using ADS1299 Analog-fornt-end. ADS1299 use SPI interface to talk with Arduino. Currently, I can record the analog signal ...
- 11
0
votes
1
answer
1k
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Sampling rate of multiple analog pins on Arduino
as I checked on Arduino website, they mentioned all boards: UNO, Nano, Mini, Mega have maximum sample rate 10kHz for each analog pin. So my concern is:
1) is there any difference between sampling ...
1
vote
1
answer
454
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Arduino Uno ADCH register stuck at 255 when read from ISR
I'm working on a project that will essentially become an oscilloscope in the long run. I am following this guide. My code is uploaded here for more reference.
In my .ino file I have called functions ...
0
votes
2
answers
359
views
If I use a biasing circuit for a signal going into an analog input pin, will it affect the ADC operation?
If I have a single 100Hz AC signal biased by two 1 M-ohm resistors (as per schematic below), and then output to an Arduino UNO analog input pin, with the UNO sampling at around 1 kHz using delays, ...
- 123
2
votes
2
answers
1k
views
Lowest voltage applicable on AREF pin on Uno and Mega
I need to measure an Analog signal in the range of 5-30 mV.
Naturally, using the internal default 5V reference leads to very poor measurement resolution. I would like to use the capability to use an ...
1
vote
2
answers
778
views
Sampling/transmission limits for USB and Arduino UNO R3
I'm very new at this and I need some help. This is a college project that I must do and not even the professor knows for certain if it is possible.
I have to sample two signals at a fixed sampling ...
- 11
0
votes
1
answer
997
views
Amplified piezo sensor wiring problem
I am trying to amplify the signal from an Adafruit Small enclosed piezo. The piezo is working using the Arduino Knock example but I want to increase the sensitivity using an amplifier. The wiring ...
- 178
2
votes
0
answers
749
views
Using Analog Comparator on Uno to Read Differential Voltage Signaling
I am trying to use the Arduino Uno to read an AVCLan bus on a Toyota vehicle. Logic 0 is when +/- drive are 120mV or more apart, and logic 1 is 20mV or less. See Toyota AVC-Lan description.
I ...
- 121
0
votes
1
answer
2k
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Sampling rate of analog read
I have a simple following analog reading code:
void setup()
{
// initialize serial comms
Serial.begin(9600);
}
void loop()
{
// read A0
int val0 = analogRead(0);
int val1 = analogRead(1);
...
- 417
1
vote
1
answer
450
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 ...
- 173
0
votes
1
answer
554
views
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 ...
- 3