Turns Counter Magnetic is an iPhone app designed to calculate the number of turns when winding an inductor (inductance coil). With the help of the built-in smartphone magnetic field sensor, the app accurately determines the number of rotations of a magnet, allowing users to calculate the number of coil turns. Additionally, the app can also measure the rotation of a smartphone without using a magnet, making it versatile for winding large coils.

Before taking any measurements, it is crucial to calibrate the magnetometer. This involves placing the smartphone at the desired location for measurements, ensuring there are no nearby magnets, and pressing the "0" button on the top to set the calibration.

The app offers several useful features, including the selection of the magnetometer axis, sensitivity setting for the threshold level, alerts when reaching a specific number of turns, and notifications for each addition of turns. Users can customize the sound signal by adding a specific number of exclamation marks. Additionally, the app provides a countdown feature and allows users to capture a photo with the measurement results displayed.

It is important to note that the maximum rotation speed supported by the app is 1000 RPM (16 Hz). Users should avoid high rotational speeds to prevent the magnet from detaching and potentially damaging the smartphone. The app also offers the ability to measure rotation speed within the range ofRPM with a ±2% accuracy.

Overall, Turns Counter Magnetic is a handy utility tool for individuals involved in winding inductors. It provides accurate calculations of turns and offers various customizable features to enhance the user experience. However, caution should be exercised when using magnets to avoid any potential injuries or damage.