It's the simplest semiconductor device made. It ushered in the age of radio, the electronic valve that rectifies and regulates - the diode!
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Make: Electronics, 3rd Edition: https://www.makershed.com/products/ma...

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http://makezine.com/2009/04/29/make-p...

More Make Presents:

Ohm's Law:    • MAKE presents: Ohm's Law  

The Resistor:    • MAKE presents: The Resistor  

The Capacitor:    • MAKE presents: The Capacitor  

The LED:    • MAKE presents: The LED  

The Inductor:    • MAKE presents: The Inductor  

The Multimeter:    • MAKE presents: The Multimeter  

The Oscilloscope:    • MAKE presents: The Oscilloscope  

The Integrated Circuit:    • MAKE presents: The Integrated Circuit  

The Transistor:    • MAKE presents: The Transistor