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A LITTLE DIRECTION

Project guides.

Practical notes to help you choose, plan and understand your project.

Illustration of an FDM 3D printer building a bracket, a vernier caliper measuring a printed gear, and a translucent cube showing internal infill lattice.B.E./B.Tech Mechanical and mechatronics students printing load-bearing prototype parts on FDM printers

3D Printing Settings for Strong Functional Prototypes: Materials, Walls, Infill and Orientation

A printed part is a laminate, not a solid block: orient loads along the layers, use 4+ walls, 40-50% gyroid infill, and 0.12-0.2 mm layers for parts that carry real loads. This guide compares PLA, PETG and ABS for functional use, gives a ready slicer profile, design rules for holes and fasteners, and two quick strength tests to run before trusting any part.

Read guide Illustration of star and delta three-phase winding connections with red, yellow and blue phase conductors, a green earth wire, and a three-phase motor.B.E./B.Tech Electrical and EEE students building three-phase demo rigs and motor projects

Three-Phase Wiring Basics: Star vs Delta, Neutral Sizing and Student Safety Rules

Three-phase wiring explained for students: what three-phase is, star vs delta connections with the root-3 voltage and current relationships, neutral sizing for unbalanced and harmonic loads, TN-S/TN-C-S earthing, single-phasing protection, and the safety rules for working around 415 V boards.

Read guide Illustration of an open industrial automatic power factor correction panel with capacitor cans, copper busbars, contactors and a power-factor controller.B.E./B.Tech Electrical students designing APFC panels and industrial training reports

Power Factor Capacitor Sizing: kVAr Calculation, Detuning Reactors and a Worked Example

Size the capacitor bank your APFC panel needs: the Qc = P(tan phi1 - tan phi2) formula, a complete 250 kW industrial worked example, step division for controllers, detuning reactors for harmonic plants, resonance checks, and the commissioning steps that keep capacitor banks alive.

Read guide Illustration comparing a small single-phase capacitor-start motor and a larger three-phase squirrel-cage induction motor side by side on a workbench.B.E./B.Tech Electrical and Mechanical students selecting motors for demo rigs and automation projects

Single-Phase vs Three-Phase Motors: Starting, Efficiency, Cost and Choosing for Demo Rigs

Single-phase or three-phase motor for your project? Compare starting methods, efficiency, torque, speed control, cost and availability - with a decision framework based on your venue's supply, plus nameplate reading, used-motor inspection, and commissioning checklists.

Read guide Illustration of an open electrical distribution panel with an MCB, an MCCB and an ELCB/RCCB on a DIN rail, with colour-coded phase, neutral and earth wiring.B.E./B.Tech Electrical and EEE final-year students wiring demo panels and protection projects

MCB vs MCCB vs ELCB: What Each Breaker Protects Against and How to Select the Right One

MCB, MCCB or ELCB? This guide explains what each device actually protects against - overload and short circuit for MCB/MCCB, earth leakage for the modern RCCB that replaced the old voltage-operated ELCB - plus how to read B/C/D trip curves and breaking capacity, a worked demo-panel selection example, discrimination basics, and the wiring mistakes that fail student panels.

Read guide Illustration of a soil cross-section showing the fall-of-potential earth resistance test with an earth electrode, test spikes, and a hand-held earth tester.B.E./B.Tech Electrical students testing and documenting earthing for projects and installations

How to Test Earth Pit Resistance: Fall-of-Potential Method, IS 3043 Limits and Fixes

Measure earth pit resistance the right way: the fall-of-potential method with the 52/62/72 percent plateau check, soil resistivity estimation, reading results against IS 3043 limits, fixing high-resistance pits with deeper electrodes, multiple rods and bentonite backfill, and the maintenance schedule that keeps pits passing.

Read guide Illustration of a 7805 linear regulator with a clip-on heatsink on a breadboard, glowing with heat, beside a capacitor and jumper wires.B.E./B.Tech Electronics and E&TC students debugging overheating power supplies in their final-year projects

Why Your 7805 Voltage Regulator Gets Hot: Power Dissipation, Heatsink Math and Buck-Converter Alternatives

A hot 7805 is not broken — it is dissipating (Vin − Vout) × load current as heat. This guide shows how to calculate the dissipation with datasheet thermal numbers, diagnose thermal shutdown vs real faults, size a heatsink with RθSA math, and decide when a buck converter is the right answer instead.

Read guide Illustration of an industrial variable frequency drive unit with keypad display, cabled to a blue three-phase induction motor in a workshop.B.E./B.Tech Electrical and EEE students building VFD-based motor control demo rigs for final-year projects

VFD Basics: How Variable Frequency Drives Control Induction Motor Speed — Wiring, Parameters and Student Safety

A VFD controls induction motor speed by varying supply frequency while holding the V/f ratio constant (Ns = 120f/P). This guide explains the rectifier-DC bus-inverter stages, how to size a single-phase-input drive for a lab with no three-phase supply, the wiring rules, the parameter commissioning sequence, and the safety essentials — including the DC bus that stays charged after power-off.

Read guide Illustration of a tilted solar panel on an Indian rooftop wired to a charge controller box and a row of batteries under bright sun.B.E./B.Tech Electrical and EEE students sizing solar power for final-year projects and demo installations

Solar Panel Sizing for Student Projects: Load Calculation, Sun Hours, Battery Backup and Charge Controller Selection

How do you size a solar panel for a project? Audit the load in Wh/day, divide by (peak sun hours × 0.72 derate) for panel watts, size the battery from daily energy × autonomy days ÷ (voltage × depth of discharge), and rate the controller at ≥ panel Isc × 1.25. This guide works every step with a 20 W solar street light example, plus a reusable Python sizing calculator.

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