A simple, practical, interview-focused plan for someone returning to electronics after a break. The goal is not deep theory — it is confidence with Arduino, common components, basic circuits, and troubleshooting.
| Day | Topic | Subtopics | Hands-on Activity | Expected Outcome |
|---|---|---|---|---|
| Day 1 | Electronics Basics | Voltage, Current, Resistance, Ohm's Law, AC vs DC, Power Supply | Measure voltage and continuity using a multimeter | Understand electrical fundamentals |
| Electronic Components | Resistor, LED, Capacitor, Diode, Push Button, Potentiometer, Buzzer | Identify each component physically | Recognize common components | |
| Breadboard & Wiring | Breadboard layout, power rails, series/parallel, jumper wires | Wire an LED circuit on breadboard | Build simple circuits correctly | |
| Arduino Introduction | Arduino UNO, Microcontroller, USB, Reset, Digital/Analog pins | Install IDE and upload Blink | Become familiar with Arduino | |
| Arduino IDE | Sketch, Verify, Upload, Serial Monitor | Upload the Blink example | Successfully upload the first program | |
| Day 2 | Arduino Programming Basics | setup(), loop(), variables, data types | Modify Blink timing | Understand sketch structure |
| Core Functions | pinMode(), digitalWrite(), digitalRead(), delay() | LED ON/OFF program | Control digital I/O | |
| Decision Making | if-else, comparison operators | Button-controlled LED | Read digital inputs | |
| Loops | for loop | Blink LED multiple times | Learn repetitive execution | |
| Mini Project | Traffic Light System | Three LEDs with delays | Combine multiple concepts | |
| Day 3 | Analog Inputs | analogRead(), ADC, Potentiometer | Read potentiometer values | Understand analog signals |
| PWM Output | analogWrite(), PWM concept | LED brightness control | Learn PWM basics | |
| Serial Communication | Serial.begin(), Serial.print(), Serial.println() | Display sensor values | Learn debugging using Serial Monitor | |
| Sensors | LDR, Ultrasonic Sensor (HC-SR04), Temperature Sensor (overview) | Read sensor values | Interface simple sensors | |
| Debugging | Compilation errors, COM port issues, loose connections, wrong pin selection | Fix intentionally created mistakes | Develop troubleshooting skills | |
| Day 4 | Revision | Review all concepts from previous days | Quick recap quiz | Reinforce learning |
| Mini Project | Automatic Night Lamp (LDR + LED) or Obstacle Detector (Ultrasonic + Buzzer) | Complete one working project | Gain confidence in integration | |
| Interview Preparation | Common electronics and Arduino questions | Oral discussion | Explain concepts confidently | |
| Troubleshooting Questions | LED not glowing, upload failure, sensor not working, wrong readings | Debug live examples | Demonstrate practical problem-solving |