Questions tagged [analogreference]
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23 questions
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AREF pin on Arduino Uno R3
edit
So then, AREF can only output a voltage when used by the ADC, but not when used by the AC.
That is what I sense all your answers are pointing at, yet none has it black on white. My questions ...
- 136
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Arduino Uno, does a lower Aref voltage work well for measuring current? without increasing ADC integral non-linearity
I want to measure current using a Arduino Uno and use a very low resistance of 0.1Ohm or lower for the shunt resistor to measure the current(to reduce power waste and heat generation),
as a result ...
- 254
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adc arduino using reference voltage to read stable/constant lithium battery voltage
I want to read my lithium battery voltage.
I WANT TO CREATE A FUNCTION TO READ MY 3.7~4.2V,1200mAH BATTERY VOLTAGE THROUGH A MICROCONTROLLER (ARDUINO OR ATTINY44).
THEN I WANT TO CALL THE CREATED ...
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1
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Nature of the voltage reference instability of internal 1.1V reference of ATmega328P (Nano)
The ATmega328P data sheet in table 29-11 on page 324 notes that the internal 1.1V reference (VBG) may vary between 1.0V and 1.2V. In this answer this is called "not stable or accurate".
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- 133
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Arduino , python , pyfirmata , standard firmata
Is there a way to change arduino analog reference to EXTERNAL IN PYTHON using pyfirmata or any other library ?
Necessary Links : https://www.arduino.cc/reference/en/language/functions/analog-io/...
- 11
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1
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1k
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Inaccurate and non-precise voltage reading from Arduino Analog pin
float get_volt() {
rawVolt = analogRead(voltageSensor);
vOUT = (rawVolt * 4.6) / 1024.0;
vIN = vOUT / (R2/(R1+R2));
//if(vIN>12.0){vIN=12;}
//if(vIN<11.12){vIN=11.12;}
//return (vIN -...
- 23
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1
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Extremely unstable analogRead() on Arduino Nano when powered from an external source
I'm doing a really simple project with an Arduino Nano and found a problem.
The circuit is a simple temperature sensor and a tension read from an analog pin everything showed on a Nokia 5110 LCD.
When ...
- 111
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1
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1k
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analogReference(INTERNAL) configuration
I need some help because I did not understand the configuration analogReference(INTERNAL).
I would measure the intensity of a Laser beam passing through a filter. This is the circuit I would implement,...
-2
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1
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Voltage at AREF pin
I find difficulties to measure correctly the voltage at the AREF pin.
I would measure voltages with a resolution not exceeding 1 mV . nda voltage divider
In one of my trials, I was using a 9V ...
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3
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Powering the Arduino with a battery and reading the battery voltage
I am trying to display the battery voltage as it is being used to power the Arduino.
I have tried powering the Arduino through the USB and the battery voltage is read accurately when compared to the ...
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2
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Is AREF a stable output Ref voltage with analogReference(INTERNAL)
I'm using an analog input on a NANO board to measure the midpoint between two photo resistive (Cadmium) cells, with the two outside ends tied to GND and a source voltage. Basically a simple voltage ...
- 407
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1
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587
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How to work with analog readings using RPi and Firmata?
For context: I'm working on a project where I need to use sensors to figure out the current state of the environment. This process is done using an Arduino UNO and a RPi. The easiest way that I found ...
- 113
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1
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Vcc measurement with internal 1.1V reference fails on 3.3V powered Atmega328
I need to monitor a battery plugged to an ATmega running on standalone mode.
I use the "ATmega on a breadboard (8 MHz internal clock)" bootloader.
More info here
When the ATmega is powered with 5V ...
3
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4
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what is arduino adc reference?
I'm using arduino for the first time and don't really understand what am I suppose to plug to the ADC refernce PIN... or if I even have to use it while plugging analog sensor to the arduino,
thanks!
Eyal Givon
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External ADC reference when using MATLAB support package for Arduino
I am using the MATLAB support package for Arduino.
However, I need to configure the ADC reference to external. MATLAB documentation doesn't really explain how to do this?
Is there any way I can use ...
