Sound Generator: Build a Sound Machine Around Three Basic Chips

摘要

As a skilled designer, you can probably build most of the electronics non-engineers have to buy. A sound generator is an example. Here you learn how to build one with a microcontroller, a DAC, and an audio amplifier chip. One of the most under-appreciated things in life is a good night's sleep, although it becomes more elusive, and thus more appreciated, as you grow older. Technology can't help with your more frequent nocturnal trips to the bathroom, but there are a few other ways it can help. Two common problems involve the difficulty in getting to sleep in the first place, as well as a heightened sensitivity to extraneous noises, which wake you up during the night. I have two dogs that are inclined to bark when they hear anything unusual. The obvious solution seemed to point to masking out such irregular sounds in some way.