This document contain knowledge, how you to design a PCB boards as rules of Electromagnetic Compatiblity - EMC and create projects with microcontrolers. Guide Emc Compatiblity helped to prevent electricy charge that entered in our Controler and PCB, when we have using for home and industrial environment. This document give several ways to improve EMC susceptibility and broke down our equipment.-　　 This document contain knowledge, how　you　to design a PCB boards as　rules of　Electromagnetic Compatiblity - EMC　and create projects with microcontrolers. Guide Emc Compatiblity helped to prevent electricy charge that entered in our Controler and PCB, when we have using for home and industrial environment. This document give several ways to improve EMC susceptibility and broke down our equipment.