+A diode is a fundamental [semiconductor](/wiki/semiconductor) device that primarily allows [electric current](/wiki/electric_current) to flow in a single direction. Acting like a one-way valve for electricity, it is crucial for converting alternating current to direct current and protecting sensitive circuits.
+## See also
+- [Transistor](/wiki/transistor)
+- [Resistor](/wiki/resistor)
+- [Capacitor](/wiki/capacitor)
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