Basic Electronics Components And Their Functions Pdf -
In the age of smart devices, robotics, and DIY innovation, understanding electronics is no longer just for engineers. Whether you are a student, a hobbyist, or a professional looking to refresh your knowledge, the journey begins with one crucial step: identifying basic electronics components and understanding their functions.
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Function: Oppose the flow of electric current, controlling voltage and current in a circuit.
| Type | Description | Use | |------|-------------|-----| | Fixed resistor | Constant resistance | Current limiting, voltage division | | Variable resistor (potentiometer) | Adjustable resistance | Volume controls, tuning circuits | | Thermistor | Resistance changes with temperature | Temperature sensors | | LDR (Light Dependent Resistor) | Resistance changes with light | Light sensors, automatic street lights | basic electronics components and their functions pdf
Color Code: 4 or 5 bands indicate value and tolerance. (Black=0, Brown=1, Red=2, Orange=3, Yellow=4, Green=5, Blue=6, Violet=7, Grey=8, White=9)
Ohm’s Law: ( V = I \times R ) (Voltage = Current × Resistance)
Function: Convert physical quantities (temperature, light, pressure) into electrical signals. In the age of smart devices, robotics, and
| Sensor | Measures | Output type | |--------|----------|-------------| | Thermocouple | Temperature | Voltage (mV) | | Phototransistor | Light | Current variation | | Potentiometer | Position/rotation | Resistance change | | Microphone (electret) | Sound | AC voltage | | Accelerometer (MEMS) | Acceleration | Digital (I²C/SPI) or analog voltage |
Function: Miniaturized electronic circuits containing thousands to billions of components (transistors, resistors, etc.) on a single chip.
Common ICs:
| IC Family | Examples | Function | |-----------|----------|----------| | 555 Timer | NE555 | Oscillators, PWM, timing delays | | Op-Amps | LM358, LM741 | Amplify voltage differences | | Voltage Regulators | 7805, LM317 | Provide stable DC voltage | | Logic gates | 7400 series (AND, OR, NOT) | Digital logic operations | | Microcontrollers | ATmega328 (Arduino) | Programmable control |
Packages: DIP (through-hole), SMD (surface mount), TO-220.