Electronic components
Electronic components can be classified in:
- Active components: usually can inject power into a circuit. They are made of semiconductors. E.g: Diodes, transistors.
- Passive components: cannot introduce net energy into the circuit. E.g: Resistors, capacitors
Passive components
Fixed resistors
- They impede the flow of electric current
- There is a colour code to know their value
Variable resistors
- Potentiometer: A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider.
- Thermistor: semiconductor type of resistor whose resistance is strongly dependent on temperature. They can be
- Negative-temperature-coefficient (NTC): thermistors have less resistance at higher temperatures
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- Positive-temperature-coefficient (PTC): thermistors have more resistance at higher temperatures
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- Light Dependent Resistors (LDR): passive component that decreases resistance with respect to receiving luminosity on the component's sensitive surface
Capacitors