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A LITTLE DIRECTION

Project guides.

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

Illustration of an electrical cable cross-section showing copper conductors and insulation, with a sizing calculation of current, derating and voltage drop.B.E./B.Tech Electrical students wiring lab panels, motor feeders and project installations — anyone who has ever guessed a wire size

Cable Sizing Calculation: A Practical Guide

Guessing wire size is how panels melt. This guide gives the real method: design current Ib, derating for ambient and grouping, voltage-drop check, protection coordination (Ib ≤ In ≤ Iz), and the adiabatic fault check — each with a worked example.

Read guide Illustration of an ESP32 board emitting Bluetooth beacon waves, with a smartphone nearby showing signal strength bars and proximity zones.B.E./B.Tech Electronics, E&TC and IoT students adding Bluetooth proximity or beacon features to ESP32 projects

BLE Basics: ESP32 as a Bluetooth Beacon

Learn Bluetooth Low Energy the practical way: build an ESP32 beacon your phone can detect. Covers advertising vs GATT connections, iBeacon and Eddystone formats, honest RSSI-based proximity, scanner-side code, and project ideas that demo well.

Read guide Illustration of a MAX17043 fuel gauge chip connected over I2C to a microcontroller, displaying a battery state-of-charge percentage gauge beside a lithium cell.B.E./B.Tech Electronics, E&TC and IoT students building battery-powered projects who need accurate state-of-charge readings instead of crude voltage guesses

Battery Fuel Gauges: MAX17043 Explained

Stop guessing battery level from voltage: the MAX17043 fuel gauge reports real state of charge over I2C. Learn why voltage-based estimation fails, how the chip works, wiring, the essential registers with Arduino code, and how to make your node adapt its behavior to remaining charge.

Read guide Illustration of ESP32 devices connecting over the internet to a cloud labeled AWS IoT Core, with device shadows, certificates and a rules engine routing data to storage.B.E./B.Tech Electronics, E&TC, IoT and Computer Science students who want to connect ESP32 projects to AWS cloud services for a final-year project

AWS IoT Core for Students

Connect your ESP32 project to AWS IoT Core the right way: things and certificates, mutual TLS, device shadows for offline-friendly commands, the rules engine for routing data, free-tier budgeting, and an honest comparison with self-hosted Mosquitto.

Read guide Illustration of an APFC panel with capacitor steps, capacitor-duty contactors, detuning reactors and a controller display showing power factor.B.E./B.Tech Electrical students studying power factor correction, or building APFC / reactive-power projects

APFC Panel Working Explained

The APFC panel keeps industrial power factor high automatically — and utilities bill for it. This guide covers each component, how the controller switches steps (C/k, discharge delay, target pf), a full 120kW→100kVAr sizing calculation, commissioning checks and real failure modes.

Read guide Illustration of active learning showing a model selecting the most uncertain unlabeled examples from a large pool for a human to label, in a feedback loop.B.E./B.Tech Computer Science and AI/ML students with large unlabeled datasets and limited labeling time who want maximum model quality per labeled example

Active Learning: Train Good Models with Less Data

Which examples should you label when you can't label them all? Active learning lets the model pick its most informative examples. This guide covers uncertainty and diversity sampling, hybrid strategies like BADGE, the practical human-in-the-loop cycle, cold-start handling, and the random baseline you must beat.

Read guide Illustration comparing ADC resolution steps versus accuracy errors, showing offset, gain, and noise on a transfer curve diagram.B.E./B.Tech Electronics and E&TC students reading sensors with microcontroller ADCs (Arduino, ESP32, STM32) in academic and final-year projects

ADC Resolution vs Accuracy: What Matters

Your 12-bit ADC gives jumpy readings while a 10-bit one looks steadier? Learn the difference between ADC resolution and accuracy: LSB size, offset/gain/INL/DNL errors, ENOB, why the reference voltage matters more than bit count, and practical noise fixes including oversampling.

Read guide Illustration of A/B testing for ML models showing user traffic split between model A and model B with metric comparison charts deciding the winner.B.E./B.Tech Computer Science and AI/ML students deploying ML-powered features who need to compare model versions on real users instead of arguing from offline metrics

A/B Testing ML Models: A Practical Guide

Offline metrics measure the model; A/B tests measure the product. This guide covers designing ML experiments (metrics, randomization units, sample size), the essential statistics, ML-specific traps — interference, novelty effects, peeking, offline-online mismatch — and honest low-traffic alternatives like interleaving and shadow deployment.

Read guide Illustration of common FDM 3D printer failures: warping, stringing, layer shifting and under-extrusion, each labeled with its signature appearance and fix.B.E./B.Tech Mechanical (and all-branch) students 3D-printing prototypes for projects — anyone staring at a failed print at 2 AM

3D Printer Troubleshooting: Fix Common Failures

Every FDM failure has a signature look and a short list of causes. This diagnostic guide covers adhesion, stringing, layer shifts, under-extrusion, warping, overhangs, clogging and heat creep — with baseline PLA/PETG settings, a quick flowchart, and design rules that prevent failures.

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