How to multiply your Arduino UNO for less than 4 dollar

In this video I show and explain how to easily get and use several Arduino UNO microcontrollers Atmel 328P-PU without the need to use the Arduino UNO board, except for uploading the sketch.
It became kinda obsolete, after I found out about the even cheaper Arduino Pro Minis. But anyway, it was a nice project and gave me some more understanding of the Arduino hardware.

 

pictures of the breadboard and parts:

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