Electronics Mechanic: NCO 7243

General Information

• The trade is named "Electronics Mechanic"
• The NCO code number is 7243.10, 7243.50, and 7243.90
• The course duration is 2 years, split into four semesters of six months each
• The power norm is 3.04 kW
• The space norm is 56 Sq mtrs
• Entry qualification is passing the 10th class examination under the 10+2 system of education
• The unit size is 20 trainees

Instructor's/Trainer's Qualification

• A Bachelor's degree in Electronics/Electronics & Telecommunication/Electronics & Communication with one year of relevant field experience
• A Diploma in Electronics/Electronics & Telecommunication/Electronics & Communication from a recognized board of technical education with two years of experience
• NTC/NAC in the trade with three years' experience

Desirable Information

• Instructor's Certificate (CIC) preference
• At least one instructor must have a Degree/Diploma in the relevant field.

Course Overview

• The course is for candidates aspiring to become Technicians in Electronics based Systems/Equipment

Deliverables

After completing the course, trainees can:

• Identify active and passive components and their applications
• Handle different types of electronic measuring instruments
• Identify different types of faults in electronics equipment
• Repair and maintain computer hardware and networks
• Repair and maintain SMPS, UPS, Inverters, solar power systems, and analog and digital circuits
• Repair and maintain electronics communication equipment and fiber optics
• Install various transducers and sensors
• Repair and maintain microcontroller based systems
• Repair, maintain & install LED/LCD TVs and cell phones (mobiles)

Employment Opportunities

• Electronics Equipment Manufacturing Industries
• Automobile electronics and related industries
• Solar power based inverter manufacturing industries
• LED light manufacturing industries
• Service industries like BSNL, MTNL, Home appliances manufacturing companies, Railways, ISRO, Naval dockyard, RCF, BPCL etc.
• Mobile industries like LG, Samsung, Nokia, Sony etc.
• Public sector (BHEL, BEML, NTPC, etc.) and private industries in India & abroad, Petrochemical industries (ONGC, IOCL, HPCL etc.)
• Self-employment

Further Learning Pathways

• Opt for additional NCVT certificates by completing the third and fourth semesters
• Pursue Apprenticeship training in reputed industries/organizations
• Have lateral entry to a Diploma course

First Semester: Fundamentals of Electrical and Electronic Components

Objectives

• Familiarize with basics of electricity
• Identify and use different hand tools
• Test electrical parameters, cables, and measurements
• Identify and test cells/batteries
• Identify and test passive electronic components
• Use electronic components in different circuits
• Practice soldering and de-soldering various types of electrical and electronic components
• Identify and test semiconductor devices
• Identify, disassemble, and assemble a computer system
• Replace functional parts like HDD, CDD, SMPS, Memory etc
• Practice OS, clean the system with antivirus software, and maintain the computer systems
• Work with MS Office packages
• Ability to browse, create email IDs, and download data using search engines

Trade Practical and Theory: Semester-I (Weeks 1-5)

• Trade and Orientation: Visits to the institute and workshops, Introduction with staff
• Focus is on the EM trade and its industry relevance
• Understanding safety, safety signs, and Personal Protective Equipment (PPE)
• Use of first aid mechanisms for electrical shocks/injuries
• Hand Tools uses: Demonstration and usage of hand tools like screwdrivers, pliers, tweezers, wire strippers, knives, steel rules, scribers, punches, hacksaws, hammers, files, vices and drilling machines
• Learning about identifying types of screws, bolts, nuts, washers, rivets, clamps, etc.
• Riveting, cutting, and bending sheet metals
• Basics of AC and Electrical Cables: Identifying phase, neutral, and earth on power sockets and Using a test lamp to check mains
• Understanding voltage, current, resistance, cycles, frequency, RMS value
• Properties of conductors and insulators

Trade Practical and Theory: Semester-I (Weeks 6-9)

• Cells & Batteries: Identify primary/secondary cells
• Also measure voltages using analog/digital multimeters and Learn charging and maintaining batteries
• Types of cells/batteries, materials used, specifications, and charging process
• Connections in series and parallel
• Passive Components: Identify resistor types, Measure resistor values, Determine Power rating
• Understand ohm's law and its variables, Resistor types and specifications
• Understanding series/parallel circuits, KVL/KCL principles and Inductance

Trade Practical and Theory: Semester-I (Weeks 10-13)

• Transformers: Identification of different mains transformers and testing polarity
• Also identification of shapes for low capacity transformers and Measuring voltages
• Understand Transformer principle & construction and different types of losses
• Measurements: Measuring AC & DC parameters and usage of multimeter and CRO
• Introduction to electrical measuring instruments and meter classification
• Understanding the different controls on measuring equipment
• Soldering: Identifying types of soldering guns and soldering components
• Proper soldering techniques and de-soldering techniques

Trade Practical and Theory: Semester-I (Weeks 14-17)

• Rectifiers: Identification of diodes and bridges and recording specifications
• Also testing diodes and Constructing and testing rectifiers
• Understanding Semiconductor component numbering and types and Forward/Reverse biasing of diodes
• IC Regulators: Identifying different +ve and -ve regulator ICs and Identifying the pins
• Proper construction techniques and Fixed vs Variable regulators
• Computer Hardware, OS, MS Office Networking: Identification of indicators and connectors and drives
• Also, enabling or disabling functionality
• Basic computer Hardware and software info, with operating system use and file management

Workshop Calculation & Science : Semester-I

• FPS, CGS, SI Units dimensions and conversions
• Fundamentals and derived units, Supplementary units
• Basic algebra - algebraic formula. Simultaneous equation- quadratic equations
• Simultaneous linear equation in two variables. Factorization.
• Ohms law: Current, voltage, resistance and related problems, multiple and submultiples units, electric power, and power formulas.
• Calculation of Equivalent resistance of series and parallel circuits
• Calculation of voltage and current in series and parallel resistive circuits
• Calculations related to transformers, turns ratio, voltage ratio, current ration & efficiency
• Calculations related extension of Direct-current meters: Moving coil meter Loading effect of voltmeters related problems
• Heat and temperature, its units and specific heat of solids, liquids and gases
• Half wave, full wave and bridge rectifier dc output, ripple factor, efficiency calculations
• Calculation on Zener regulator circuits.
• Time constant calculation of RC circuit.
• Voltage, current, phase angle and Impedance calculation of RC, RL Circuits
• Voltage, current, phase angle and Impedance calculation of RLC Circuits
• Calculation of resonant frequency of series and parallel circuits

Engineering Drawing: Semester-I

• Engineering drawing and its importance
• Free hand sketches of straight line, square, rectangle, circle, polygon etc.
• Free hand sketches of hand tools
• Types of lines
• Dimensions and its types.
• Use of drawing instruments, T square, set square etc. Lettering practice
• Types and Scaling of drawings. Electrical symbols
• Symbols of electronic components
• Schematic diagram of Moving coil meter, Moving Iron meters,
• Schematic diagram voltmeter, Ammeter, Ohm meter.
• Draw Half wave, full wave and bridge rectifier circuits with and without filters
• Regulated power supplies with capacitors
• Orthographic 1st angle projection

Second Semester: Analog and Digital Electronic Circuits

Objectives

• Construct and test simple amplifier circuits
• Construct and test wave shaping circuits
• Identify and test power electronic components
• Identify and test optoelectronic devices
• Practice SMD Soldering and De-soldering of Simple SMD components
• Identify and verify truth tables of various digital ICs using Data book
• Practice circuit simulation software to simulate and test the circuits
• Stimulate and test various circuits using the software
• Identify and test various types of LEDs and LED displays
• Construct and test various OP-AMP IC based circuits
• Construct and test 555 IC based application circuits

Trade Practical and Theory: Semester-II (Weeks 1-5)

• Transistor: Identifying PNP/NPN transistors, specifications, and packaging,
• Also measuring E-B, C-B & C-E terminal resistances and Constructing circuits to understand transistor behavior
• Working of PNP/NPN Transistors, biasing, and transistor power ratings
• Amplifier: Constructing amplifier Circuits
• Transistor (CB, CE & CC) configurations, biasing techniques, and Amplifier Classifications

Trade Practical and Theory: Semester-II (Weeks 6-9)

• Wave shaping circuits: Construct different clipper circuits and Schmitt trigger circuits
• Diode shunt clipper circuits and Clamping/limiting circuits and their applications
• Power Electronic Components: Identify FET transistors and recording main parameters with multimeter. Construct Amplifier Circuit
• Construction of FET, the relationship and Suitable use of components
• MOSFET & IGBT: Proper number Identification, and Proper Heat Sinks, proper Testing
• Basic Understanding of MOSFET and the power and Switching properties

Trade Practical and Theory: Semester-II (Weeks 10-13)

• Opto Electronics: Testing LEDs and Identifying LDR and Constructing Circuits
• Working of LEDs and other Optoelectronic devices, and construction
• Basic SMD components: Identification of SMD and proper Solder Techniques
• Soldering of SM assemblies - Reflow soldering and Proper hardware tips
• Basic Gates: Proper gate indentification and Digital IC Testers
• Introduction to Digital Electronics., gates, families, levels, codes

Trade Practical and Theory: Semester-II (Weeks 14-17)

• Combinational Circuits: Proper construct, and the truth table must be accurate
• Full adder and Half Adder details
• Flip Flops: Proper Number, accurate construct
• Introduction to Flip-Flop, types, connections
• Electronic circuit simulation software: the Software, Library Components, Circuits

Trade Practical and Theory: Semester-II (Weeks 18-21)

• Counter and shift Registers: Proper construction Techniques
• Details of all counter configurations
• Op – Amp & Timer 555 Applications: Proper Applications and all tests, use analog IC tester to test the various analog ICs
• Details including diagrams

Workshop Calculation & Science : Semester-II

• Calculation of transistor currents and amplification factor(gain)
• Gain dB calculation of voltage, current and power
• Arithmetic and geometric progression, sum of n-terms, simple calculations
• Mensuration – Find the area of regular objects like triangle, rectangle, square and circle
• Mensuration: volumes of cube, cuboid, sphere cylinder.
• Calculation of frequency of LC and RC oscillator and multivibrator circuits
• Calculation of LED, IRLED and photo diode currents
• Trigonometry ratios, identities
• Problems on conversion of Decimal numbers to binary, octal, and Hexadecimal
• Bit, byte, nibble, KB, MB,GB
• Addition and subtraction of Binary, Octal and Hexadecimal Numbers
• Calculation of frequency division in flip-flops/counters
• Inverting and non inverting amplifier gain calculations
• Time period and frequency calculation of Astable, monostable multivibrators using IC555

Engineering Drawing : Semester-II

• Single stage amplifiers, Multistage amplifiers
• Class 'A', Class 'B', Push pull, Complimentary symmetry circuits
• Crystal and RC Oscillators circuits, Multivibrators
• Symbols for different wave shapes, Square, saw tooth, sine, triangular, Pulse.
• clipper and clamper circuits
• UJT, FET, MOSFET, DIAC, TRIC, SCR, IGBT symbols and circuits of FET
• Amplifier, SCR using UJT triggering, snubber circuit, light dimmer circuit using
• TRIAC, UJT based free running oscillator
• Orthographic 3rd angle projection of very simple objects
• LED, IRLED, photo diode, photo transistor, opto coupler symbols
• symbols of Logic gates
• Half adder, full adder, multiplexer and de-multiplexer
• Logic diagram and symbols of Flip flops
• Logic diagram of 3- bit asynchronous, synchronous and decade counters
• Op-Amp block diagram
• Inverting and non-inverting configuration, pin diagram of 555,741
• Functional block diagram of Ic555 and Astable, Monostable circuits using IC555

Third Semester: Applications of Analog and Digital Electronic Circuits

Objectives

• Operate DSO to perform various functions
• Practice SMD Soldering and De-soldering of various types of IC Packages
• Identify defects and do rework of PCB Repairs.
• Familiarize with AC/DC machines
• Construct and test simple electrical control circuits
• Identify and test various types of electrical protective devices
• Identify, prepare, terminate and test various types of electronic cables used in various systems
• Identify various functional blocks of a microcontroller system and monitor/test vital signals on them
• Identify various I/O Ports and its interface with field devices
• Interface a model application with the Microcontroller kit and run the application
• Construct and test various modulation/demodulation circuits
• Identify and test various types of sensors used in electronic industries
• Construct and test analog IC based application circuits
• Construct and test Digital IC based application circuits

Trade Practical and Theory : Semester-III (Weeks 1-5)

• Digital Storage Oscilloscope: Controls, Signal measurement and storage
• block diagram of function generator, application of digital CRO, differentiate between CRO with DSO. Advantages of DSO
• SMD Soldering and De-soldering Techniques: proper connections station and settings, crimping tools for various IC packages
• Proper soldering techniques and use of materials

Trade Practical and Theory : Semester-III (Weeks 6-9)

• PCB Rework: Handle sensitive devices and follow safety precautions, familiarization of various tools
• Introduction to Static charges, Handling of static sensitive devices and Various standards for ESD
• Electrical control circuits: Wire correct fuses, Test correct values
• Single phase Induction motors

Trade Practical and Theory : Semester-III (Weeks 10-13)

• Electronic Cables: Proper identification of the Cables, correct types for use, and various terminations
• Cable and Connection diagrams and classifications
• Communication electronics: Proper signal modulations as necessary
• Need for Modulation types and demodulation and Proper Waveforms

Trade Practical and Theory : Semester-III (Weeks 14-17)

• Microcontroller (8051): Identifying all functions and what they do
• Identify Port pins of controllers
• Sensors Transducers, and Applications: Types of sensors and what they use for
• RTD, Thermocouples, load cells, strain gauge

Trade Practical and Theory : Semester-III (Weeks 18-21)

• Sensor „Transducers and Applications
• Proper sensors selected and properly tested with all correct data
• Analog IC Applications: Application tested with correct Analog test

Workshop Calculation & Science : Semester-III

• Magnitude and frequency calculations on waveforms of CRO
• Work, power and energy- definition, units, and simple problems
• Problems on Boolean algebra.
• Ac motor speed, frequency calculations
• Electrical HP, KVA, wattage conversions
• Frequency, wavelength relations
• Modulation index, carrier and sideband power, bandwidth relations in AM circuits
• Memory address calculation
• Stress and strain, modulus of elasticity.
• Force, Speed, Velocity and Acceleration.
• Calculation of the cost of the project.

Engineering Drawing : Semester-III

• Block diagram of CRO, Lissajous figures
• SMD IC Packages.
• 741 & 555 pin diagrams.
• Summing amplifier, zero cross detector.
• Differentiator, integrator and instrumentation amplifier.
• Symbols of MCB, ELCB, MOV, Relays, contactors.
• Free hand sketches various audio, video and RF Connectors as mentioned in the theory.
• Block diagram of AM & FM transmitter and receiver. AM and FM modulated waveforms
• Block diagram and Pin diagram of 8051
• Symbols of Thermistor, thermo couple, strain gauges, LVDT, proximity sensors. Cross sectional view of LVDT
• Practice on project related drawing (not for examination purpose)

Fourth Semester: Electronic Mechanic

Objectives

• Work with DPM Modules to measure various electrical parameter
• Practice various modulation techniques to acquaint with fiber optic trainer
• Identify various functional blocks/major components/ICs in the given stabilizer. Rectify the faults
• Identify various Input and output sockets/connectors of the given SMPS and UPS
• Identify various functional blocks/major components/ICs in the given SMPS and UPS
• Monitor, measure major test points and Test the capacity of the given SMPS / UPS and rectify the faults
• Install and troubleshoot the given solar panel system
• Troubleshoot the simulated faults and practice the remedial procedures
• Read and interpret electrical drawings of a machine
• Dismantle and assemble various types of cell / smart phones
• Interface smart phone to PC and transfer the data
• Dismantle and assemble the given LED light stack
• Identify various functional parts and test for the healthiness
• Rectify the faults and follow the remedial procedures referring to manuals
• Dismantle and assemble LED and LCD TV sets
• Identify various functional parts and test
• Troubleshoot and rectify faults following the technical manuals

Trade Practical and Theory: Semester-IV (Weeks 1-5)

• Fiber optic Communication: Proper identification of components and make optical fiber setup.
• Proper FM modulation must be performed with audio and voice links as well.
• Digital panel Meter: Proper LED and LCD display
• Measure all voltages
• Different seven segments display

Trade Practical and Theory: Semester-IV (Weeks 6-9)

• SMPS: Proper dismantle and voltage checks
• various Input and Output ports should be tested
• UPS : Proper Connections and Safety Precautions as necessary

Trade Practical and Theory: Semester-IV (Weeks 10-13)

• Solar Power (Renewable Energy System): Installation and proper wiring performed.
• Use and Components identified
• Cell phones: Dismantle and assemble smart phones and proper identification.
• Proper interfacing with correct data
• Internet connection done.

Trade Practical and Theory: Semester-IV (Weeks 14-17)

• Cell Phones continued
• All steps performed correct for the correct models as appropriate
• LED Lights: Dismantle and identify the LED Light connections and protections
• Then correct voltage levels and Controller
• LCD and LED TV: Proper Identification and various Components.

Trade Practical and Theory: Semester-IV (Weeks 18-21)

• Proper Functionality and Performance. Various connections as required. Connector Identification
• Proper Cable Setup as required for any repairs

Workshop Calculation & Science : Semester-IV

• Bandwidth and modulation index, percentage modulation calculations in FM
• Temperature-mV-resistance relations range for various sensors
• Density and relative density. Archimedes principle. Laws of flotation.
• Series and parallel battery connections and their voltage current relations
• Power transmission by shaft, belts & ropes
• Antenna Parameter i.e. Antenna impedance, Gain BW, Power Gain, Efficiency.
• Current voltage calculation in LED light stacks.
• Property of material such as ductility, malleability, Hardness, brittleness, elasticity, plasticity, toughness

Engineering Drawing : Semester-IV

• Block diagram of optical fibre communication system
• Pin diagrams of IC 7106 and 7107
• Block diagram of SMPS
• Circuit diagram step up and step down chopper circuits
• Block diagram of UPS
• Solar power generation block diagram
• Free hand sketches of various equipments like power supply, LCD/LED TV, CRO function generator, IC tester
• Block diagram of base transmitter station. Block diagram of cell phone receiver system.
• Block diagram LED lighting system
• Block diagram of LCD and LED TV
• Block diagram of Remote