The electrical components are of two types - active and passive. The component which is used for power gain is active component and the one which uses the energy is passive component. Electronic circuits needs active components in order to function.
Components that utilize the power instead of delivering it is passive component. They depend on active components to function as they cannot control the current flow on their own. Passive components can multiply the signal by values that are less than one.
They can however reserve energy for the later use when there is a need to release energy and are used to filter the signals and have the ability to oscillate them. Some of the Active components are as follows:
Diodes: It is a pn junction that conducts the current in single direction only. They require some energy source to perform operation. If the reverse voltage is high enough then they can also create a reverse current.
BJT Transistors: These are Bipolar Junction Transistors. They have two pn junctions and operate in four modes. Both holes and electrons are carriers in the transistor structure.
Digital integrated circuits: These integrated circuits have digital pluses and could be multi-million component computer to simple counters.
Displays: They are used to display the output to the user.
Passive components do not require external energy, some of the passive components are as follows:
Resistors: They are used to create resistance in the current flow.
Potentiometer: They are used to create variable resistance which can be changed with a tap.
Capacitors: The energy can be stored in the electric field through capacitors.
Connectors: To connect different parts of the circuit for the signals, we use connectors.
Relay: It is a switch which can be turned on and off using an electromagnet.
If you want to buy passive components, consults the dealers in your area which can provide you high end products that satisfy your requirements.
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