Arduino Stack Exchange
Arduino Stack Exchange

Questions tagged [calibration]

Use this tag with regard to ensuring that instruments are giving accurate readings as compared to a trusted reference standard.

Use this tag with regard to ensuring that instruments are giving accurate readings as compared to a trusted reference standard.

23 questions
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Ultrasonic sensor underwater calibration

Does anyone knows how to calibrate AJ-SR04M using the Arduino? I am working on AUV. underwater reading from current code; it is giving continuous 20cm while moving inches.…
Khurram Jafry
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Calibration of pH sensor

I am working with pH sensor (https://wiki.seeedstudio.com/Grove-PH-Sensor-kit/ ) and arduino. The board provided with sensor is not having any potentiometer to set the voltage value when dipped in known buffer solution. I have read that when BNC…
Jashanjot Kaur
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Fluctuation in 4 half bridge load cell via combinator

I'm currently using a Sparkfun 4 Half-Bridge load sensor (50 Kg) with combinator and amplifier both are from the Sparkfun. Link:https://www.sparkfun.com/products/10245 (For Load Sensors)https://www.sparkfun.com/products/13878…
Ayub
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Requires accurate RGB color values by the tcs3200 RGB color sensore

I used the TCS3200 sensor to read the RGB color values.First, I calibrated the sensor with white and black colors.The sensor detects red, blue, and green correctly, but does not give an accurate value.For example, green is 105 190 150 instead of 0…
ali
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Per-Arduino calibration files?

I am planning on having an array of embedded devices in my garden, and each of these is going to have its own analog moisture sensor. Each moisture sensor needs to be individually calibrated. In an ideal world, I would have the same software on each…
Matt Simmons
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How to calibrate an accelerometer?

I'm confused about a few points on how to best calibrate an accelerometer, whose data will be used in an orientation sensor fusion algorithm. As a summary, the most common approaches I've seen take measurements in 6 different orientations (1G in +x,…
Zhelyazko Grudov
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Why do I get error "Error compiling for board Arduino Uno" with my mpu6050 video stabilization code?

This is the code I'm working with. I'm using it for video stabilization system. It was working fine but for some reason now it gives me this error? Is it because I deleted the library and installed again? Please help. I'm new to arduino. Hopefully I…
Dani
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How to calibrate Arduino DUE analog readings?

I am having a problem with the analog readings on my Due. On pin A4 and A5 I am measuring voltages: double vcc = 3.288 // taken on pin 75 (ADVREF) ; analogReadResolution(12); result = analogRead(A4) * (vcc / 4095); // result = 0.47+- 0.01 …
Jack
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How to calibrate MPU 6050 thermometer?

I'm using MPU 6050 and there's a thermometer onboard. However, I looked through the chip set data sheets but could not find the instruction for temperature sensing. Could you tell me how to calibrate the data string from the two address started from…
ShoutOutAndCalculate
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QMC5883L automatic calibration

I have a QMC5883L magnetometer, and a pretty basic sketch which just prints the values from X, Y and Z axis to the serial monitor. I want to use it in an application to detect changes in the magnetic field, and the sensor will be in a fixed…
Magnus
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How to filter or eliminate earths magnetic field readings around 3D Magnetic sensor?

Im using the SparkFun MAG3110 3D sensor: https://www.sparkfun.com/products/12670 My application is essentially to make a contactless "magnetic joystick" using a local magnet for accurate and constant 3D position sensing in x, y, x planes of a local…
dandev
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Problems with ACS758 Hall Effect Current Sensors - Calibration and no Signal

I purchased 3 ACS758 Hall Effect Current Sensors datasheet on ebay. A 50,100 and 200A, all three are bi-directional. They look like this. With no current the 50A outputs 477 on the analogue input (2.33v), the 100A outputs 509 (2.48v) and the 200A…
Squats
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Can't get constant reading with load cells

I'm really a newcomer to arduino and I'm trying to build a scale with four SEN-10245 load cells and a HX711. My issue is that I can't get constant readings in the serial monitor and I'm not sure if my coding is right or if I did the right setup. I…
Miguel
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ASync Timer2 based OSCCAL value

How to calibrate the internal RC oscillator off of a 32768 Hz crystal serving Timer2? void OSCCAL_calibrate(void) //This version specific to ATmegaXX8 (tested with ATmega328) { unsigned char calibrate = 0; //FALSE; uint16_t temp; TIMSK1 =…
kellogs
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How to calibrate MMC5603 magnetometer?

I just got a MMC5603 magnetometer from Adafruit. However the measurements are unreliable. For example when I convert it to a heading it goes from 200° to 180° and then back to 200° if I move it radially.
Richard Beattie
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