Some resources to help you getting started with STM32 programming.
Rare earth magnets are a special type of magnet. They are the world’s strongest type of magnet and are composed of Neodymium, Iron and Boron (NdFeB) elements. Super strong Rare-Earth magnets - once they get stuck with each other, they are hard to break apart.
Note: The images are of multiple magnets, as its very hard to separate those magnets. But the price above is for individual magnets (1 piece only).