Design Arduino Digital Angle Finder

Hi very one

before i make this post in write "Angle" in Search of arduino forum and got 34 page
and every page have 30 results (more than 1100 threads =( and i visit it ) ...i read the thread and didn't find what i want

i want to make device able to measure the angle by using arduino like
the Digital Angle Finder

the problem is there is no video in youtube or any website for someone Teardowns this digital angle finder
to understand how it work and what IC it have inside

i don't think they use accelerometer to make it

because the a accelerometer have z and y and x

x for vertical angle
y for horizontal angle

you can't calculate Oblique angle like digital angle finder
so how to do that is there any idea any sensor to do that

my question it what sensor should i use to make digital angle finder

can i use servo motor and when i rotate it the motor will output signal and read it then calculate the angle

  • a rotary encoder with a gearbox
  • a potmeter

The latter would be able to read 270 degrees in 1023 steps

void setup()
void loop()
  // average 90 reads to stabilize a lot
  long sum = 0;
  for (int i=0; i<90; i++) sum += analogRead(A0); 

  float angle = sum / 90.0 * 270.0 / 1023.0;  //  or in one formula sum * 0.002932551;
  Serial.println(angle, 2);

The factor 0.002932551; defines the step size that can be seen in the display.
This is substantially smaller than 0.01. That is why I used two decimal to display.

the analogread reads ~8000 samples per second so at 90 reads one can still do 90 measurements per second. faster than the eye

thank you very much sir :blush:

do you mean i can use servo motor to calculate the angle instead of accelerometer

and is this code for servo motor

and which is better and more accuracy to do that (accelerometer or servo motor)

can you give me URL to most accuracy servo motor from sparkfun or other site to use it in calculate the angle

and also URL to

  • a rotary encoder with a gearbox
  • a potmeter

thank you very much for you fast reply

MY REGARD :slight_smile:

The posted code is for a potmeter NOT for a servo.

What is the best I cannot tell as I do not have all your requirements. It is simply your turn to buy a few potmeters and get started building a prototype as that is the fastest proven way to learn how things (should) work.