[table=98%] [tr][td]The circuit is shown in the figure: The microcontroller generates an SPWM wave which is inverted and filtered to generate a sine wave that drives the dynamic speaker to make sound!
The problem of ultrasound penetrating several materials at the same time
Ultrasonic distance measurement and thickness measurement both refer to the process of sound waves penetrating one medium and r
Content Introduction This book is a practical guide to the engineering design of switching power supplies. It introduces various knowledge often used in the actual design and debugging of power suppli
I'm using an x860 pc104. Once, the device hadn't been used for a few months. After I powered it on, it said that the hard drive could not be found. After I re-inserted the hard drive, it powered on ag
To make the digital tube light up one bit at a time... For example, when the power is turned on, six 8s are displayed... When a simple key is pressed, only one bit is lit and displayed as 0. When it i