This wireless headphones transmitter assures a quality reception over 2 meters. The oscillator frequency is between 1750KHz and 3500KHz and for antenna we use a ferrite bar. IC1 amplifies the audio ...

The project described in this article is a ready-made item from a $2.00 shop! And it is made in China! It is a wireless doorbell with a cost of about $10.00. It is so cheap, you could not build it ...

Find a downloadable version of this story in pdf format at the end of the story. Wireless power transfer employs a Power Transmitter with a primary coil that creates a magnetic field on a charging pad ...