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Testing some cheap electronic modules

Some electronic modules are incredibly cheap on eBay. Much cheaper than building it yourself.
They could be handy in projects. But how do they perform? Results are mixed, as you'll see below.

 

One dollar LM386 audio amplifier modules

 

Two dollar MP3 digital audio player

 

Ten dollar IC RF oscillator

 

More on electronic theory and components is contained in the following:

Disclosure: I receive a small commission from items purchased through links on this site.
Items were chosen for likely usefulness and a satisfaction rating of 4/5 or better.

 

Books by VK3YE

 

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