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AKTU Electronics Engineering Lab (AEC151C / AEC251C) Syllabus PDF – B.Tech 1st Year
Electronics Engineering Lab AEC151C / AEC251C
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Official AKTU syllabus of Electronics Engineering Lab (AEC151C / AEC251C) for B.Tech 1st Year – 1 credits, L-T-P 0-0-2. Read the unit-wise course content, course outcomes, evaluation pattern and recommended books online, or download the PDF.
Syllabus — Electronics Engineering Lab
Download PDFAEC151C / AEC251C · 1 credits · L-T-P 0-0-2
Course Objectives
- Set up a diode rectifier and Zener voltage regulator for biomedical and agri instrument supply
- Use a transistor switch to drive a relay or solenoid valve for agri or lab automation
- Calibrate temperature, pH, and soil moisture sensors and condition their signals with an op-amp
- Verify digital logic gates and understand microcontroller-based sensor data acquisition
- Demonstrate a solar PV circuit, an IoT soil monitoring node, or a simple biomedical sensor circuit
List of Experiments
| Exp. | Theory | Title | Objective / Description with Unit Application |
| 1 | Unit I | Diode Characteristics and Bridge Rectifier | Plot V-I characteristic of a silicon diode; set up a full-wave bridge rectifier with filter capacitor; measure DC output. Application: DC supply for a portable pH meter or field soil sensor unit. |
| 2 | Unit I | Zener Diode Voltage Regulator | Set up Zener regulator; vary supply voltage and load; measure regulated output. Application: regulated 5V supply for an Arduino-based irrigation controller or biomedical instrument. |
| 3 | Unit I | LED and Photodiode Characteristics | Measure LED forward voltage and current at different current levels; observe LED brightness; measure photodiode reverse current vs. illumination. Application: LED indicator in diagnostic equipment; photodiode in pulse oximeter (SpO2) light detection. |
| 4 | Unit II | BJT as a Switch – Relay Driver for Solenoid Valve | Use NPN BJT to switch a relay; connect relay to control a solenoid valve (or motor) ON/OFF using a small control signal. Application: automated irrigation valve control triggered by a soil moisture sensor reading. |
| 5 | Unit III | Thermistor Sensor Calibration | Measure resistance of a thermistor at different temperatures (room to 80°C); plot R-T curve; convert to temperature using calibration equation. Application: temperature monitoring in fermenters, incubators, and cold storage for agri-produce. |
| 6 | Unit III | Op-Amp Signal Amplifier for Sensor Output | Connect thermistor (in bridge) to non-inverting op-amp amplifier (IC 741); measure amplified output voltage for different temperatures. Application: amplifying the tiny output of a biosensor or thermocouple for display or ADC input. |
| 7 | Unit III | Op-Amp Comparator – Temperature or Light Alarm | Set up op-amp comparator with sensor input and adjustable reference; drive an LED or buzzer when threshold is crossed. Application: over-temperature alarm in biomedical autoclave; under-light alarm in greenhouse; frost alarm in farm. |
| 8 | Unit III | Soil Moisture Sensor – Calibration and Signal Conditioning | Measure output voltage of a capacitive or resistive soil moisture sensor at dry, moist, and saturated soil conditions; amplify output with op-amp if needed. Application: drip irrigation automation — turn pump ON when soil moisture drops below threshold. |
| 9 | Unit IV | Logic Gate Truth Table Verification | Verify AND, OR, NOT, NAND gate truth tables using a logic trainer; implement simple control logic: Pump ON = Soil_Dry AND (NOT Tank_Empty). Application: basic automated irrigation logic; digital control in biomedical instrument. |
| 10 | Unit V | Solar Cell – I-V Curve and Battery Charging Circuit | Plot I-V curve of a small solar cell; connect to a 12V battery via a simple charge controller; measure charging current. Application: solar-powered soil sensor node; off-grid poultry farm lighting; portable biomedical device charging in rural areas. |
| 11 | Unit V | IoT Soil / Environment Sensor Node (Arduino/NodeMCU) | Connect soil moisture and temperature sensors to an Arduino/NodeMCU; read sensor values on serial monitor; display on LCD; (if Wi-Fi) send data to ThingSpeak/Blynk. Application: precision irrigation monitoring; smart greenhouse; remote biomedical patient environment monitoring. |
| 12 | Unit V pulse oximeter; wearable health monitor concept. | Pulse Oximeter / Heart Rate Sensor Demo (Biomedical) | Connect an IR + red LED pulse sensor (MAX30100 or similar) to an Arduino; display SpO2 and heart rate on serial monitor or LCD. Application: understanding the electronics inside a clinical |
Equipment / Instruments Required
- DC regulated power supply and digital multimeters
- Breadboard and component kit (diodes, Zener, NPN BJT, IC 741, LED, photodiode)
- Thermistor (NTC) with temperature bath and reference thermometer
- LDR and soil moisture sensor (resistive or capacitive)
- Relay (5V), buzzer, small solenoid valve or DC motor
- Digital logic trainer (ICs 7408, 7432, 7404, 7400)
- Solar cell module (5W), 12V battery, simple charge controller
- Arduino / NodeMCU + LCD (16x2) + DHT11 + soil moisture sensor + USB cable
- MAX30100 / MAX30102 pulse oximeter sensor module + Arduino (for Exp. 12)
- Laptop with Tinkercad / Falstad (browser-based, free)
Teaching-Learning Methodology
Each 2-hour session begins with a 10-minute pre-lab discussion linking the experiment to its theory concept and a real product or industry application. Students build circuits on a breadboard, take measurements, and record observations, calculations, result, and inference. Post-lab discussion highlights how the experiment relates to a real device (phone charger, PLC output, biosensor, IoT node). Simulation (Falstad/Tinkercad) is used alongside hardware wherever possible.
Course Outcomes
| COs | Course Outcome Statement | KL |
|---|---|---|
| CO1 | Set up diode rectifier, Zener regulator, and LED/photodiode circuits for BT/AG instrument supply | K3 |
| CO2 | Use BJT switch to drive relay and control solenoid valve or actuator in agri or biomedical circuit | K3 |
| CO3 | Calibrate temperature and soil moisture sensors and apply op-amp amplification and comparator alarm | K3 |
| CO4 | Verify logic gate truth tables and implement simple automated control logic for BT/AG systems | K3 |
| CO5 | Demonstrate solar PV charging, IoT sensor monitoring, and biomedical sensor interfacing | K3 |
Evaluation Pattern
| Sr. | Component | Marks | Weightage |
| 1. | Day-to-day performance (Circuit building, Observation, Conduct) | 20 | 20% |
| 2. | Laboratory Record / File | 30 | 30% |
| 3. | End Semester Practical Examination (Experiment + Viva Voce) | 50 | 50% |
Safety Instructions
- Always build the circuit with power OFF; energise only after instructor check
- Do not apply voltage exceeding IC or component ratings — check datasheet
- Handle CRO probes and signal generator outputs carefully
- Do not connect 230V AC load directly — use relay output with instructor supervision only
- Switch off all instruments and tidy the breadboard and bench after every session
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