Fulfilling requests, this post’s subject is the problem of electromagnetic interference (EMI). In addition to relation with electromagnetic compatibility.
Category: Acoustics
News: Images of supersonic waves for the first time
NASA photographed images of supersonic waves created by supersonic aircrafts T-38 Talon.
Arduino tutorial (Part 9, music and 4×4 keypad)
This post is the part 9 of Arduino tutorial. Will be shown how to play music using a buzzer or a speaker and how to use a matrix keypad 4×4.