Electronics

A diode allows current to only flow in one direction in a circuit. Schematic Anode (+) --|>|-- Cathode (-) Examples [Conventional Current (+) -> (-)] (+)------|>|------(-) Current can flow - The diode is now a conductor. (+)------|<|------(-) Current can't flow - The diode is now an insulator. Use Cases Protect a circuit (if a battery is connected incorrectly, for example) Convert AC to DC current Fun fact: An LED, for example, is a Light-Emitting Diode. How a Diode Works Conductors and Insulators An atom contains the following elements: ...

NOT Invert the input. Truth Table Input Output 0 1 1 0 AND Output 1 only when both inputs are 1. Truth Table A B Output 0 0 0 0 1 0 1 0 0 1 1 1 OR Output 1 if at least one input is 1. Truth Table A B Output 0 0 0 0 1 1 1 0 1 1 1 1 NAND An AND gate followed by a NOT gate. ...

Transistors are electronic components that behave like a switch, or amplifier. Schematic .--.,-- Collector Base --(--|<) `--`'-- Emitter Examples Switch If the base pin is provided with energy, the transistor allows current to flow in the main circuit. Amplifier Altering the voltage given to the base pin allows us to control a larger voltage in the main circuit. Types of Transistor NPN An NPN transistor combines the base pin and collector pin. ...