1.This product uses KTH5641A1 as a sensor. KTHA5641 outputs 0-2.5V when encountering the North Pole and 2.5-5V when encountering the Pole, with a step of 1.5mV/GS. 2.The analog quantity is transmitted to the 51 single-chip microcomputer via the 18-bit AD chip MCP341 to calculate the magnetic field strength. 3.The magnetic field at both ends of the bar magnet is the strongest, and the magnetic field in the middle is the weakest. This is because the bar magnet can be considered to be composed of many tiny magnetic needles arranged in the same direction. The magnetic lines of force at both ends of the magnet do not completely cancel each other, but the magnetic lines of force in the middle cancel each other, resulting in stronger magnetism at both ends. 4.The edge of the circular magnet has the strongest magnetism because its magnetic field distribution is similar to that of the bar magnet. The magnetic lines of force point from the N pole to the S pole, and the magnetic field is strongest at the edge of the end face. 5.Application: Magnetic force measurement Warm reminder, the same magnet is placed in different positions, and the measured magnetic field strength is different. Because the magnetic field distribution of the magnet is uneven. The magnetic field distribution of the magnet is related to its shape and magnetization direction. Part name: KTH5641 magnetic field strength detection module Power supply: Built-in 3.7V lithium battery Charging way: Charge with mobile phone charger, TYPE-C interface, charging cable provided. Detection range: 1600GS Accuracy: There is no specific accuracy for the time being, please observe the data and the accuracy of the device is about +-5%. Instructions for use (how to use): Turn the power switch to the ON end, and the power indicator light will light up. Press the "Zero" button to reset the initial data to for zero. This step is necessary because the magnetic field is different in each place. Then use the sensor (on the back o