https://youtu.be/IcrBqCFLHIY [Video Link] This is a good six-minute video that explains how transistors work. I liked the description of N- and P-type doping. (Via Adafruit) READ THE REST
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That was good but disappointed not one mention of amplification.
The amplification is implied 
Small fail in the first sentence. “over 100 million transistors in a phone” - but there’s a transistor for every bit in the flash memory - 16GB = 16 billion transistors just there, to say nothing of the rest of the phone.
Other than that, very good and interesting.
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