Mechanical Engineering in Bangalore

A 4-DOF SCARA robotic arm designed for PCB component placement, actuated by NEMA 17 stepper motors and controlled via an Arduino-based G-code interpreter. The system achieves ±0.5mm repeatability and is programmed to pick components from a feeder tray and place them on a target grid at 30 placements per minute.

A battery-powered, GPS-guided field sprayer for small-scale farms, driven by a 150W solar panel array and 48V Li-ion battery bank. The chassis is fabricated from mild steel box section and carries a 20-litre tank with a centrifugal pump, solenoid nozzle control and a mobile app interface for spray-zone programming.

A bench-scale dynamometer that simulates vehicle deceleration and quantifies the energy recovered by a BLDC motor operating in generator mode. The rig measures input kinetic energy, recovered electrical energy and braking torque simultaneously, providing a validated dataset for comparing regenerative efficiency across load profiles.

A five-fingered prosthetic hand printed in PLA with tendon-driven actuation controlled by surface EMG signals from forearm muscles. Two MyoWare sensors detect muscle contraction patterns and route control signals to five micro-servos, enabling grip, pinch and individual finger extension gestures.

A scale model hydraulic scissor lift fabricated from mild steel flat bar, actuated by a single-acting hydraulic cylinder and a hand-operated pump. The model demonstrates force multiplication, stability analysis and the relationship between cylinder bore, stroke and platform travel, with load testing up to 20kg.

A rotary union-based system that monitors tyre pressure via wireless TPMS sensors and automatically inflates or deflates tyres to a target pressure while the vehicle is moving. A microcontroller manages the solenoid valves and compressor relay, with a dashboard display showing real-time pressure for all four tyres.

A two-axis CNC plotter that converts SVG vector files into G-code and draws them on A4 paper using a servo-lifted pen. Built on aluminium extrusion with GT2 belts and NEMA 17 steppers, the machine achieves 0.1mm resolution and is controlled by GRBL firmware on an Arduino Uno.

A lab-scale pyrolysis reactor that thermally decomposes mixed plastic waste (HDPE, PP, PS) into hydrocarbon fuel fractions through controlled heating in an oxygen-limited chamber. The system measures yield by plastic type, characterises the fuel output by calorific value, and quantifies char and gas by-products.

A rotating machinery test rig with a deliberately unbalanced rotor, misaligned coupling and seeded bearing defect, instrumented with MEMS accelerometers. FFT analysis of vibration signatures in MATLAB identifies fault frequencies corresponding to each defect type, demonstrating predictive maintenance methodology.

An electromagnetic levitation platform that suspends a ferromagnetic sphere at a stable air gap using closed-loop PID control. An IR sensor measures the gap continuously and a microcontroller adjusts the electromagnet current to counteract disturbances, maintaining levitation within ±0.3mm of the setpoint.

A bench-scale system demonstrating the charge-store-discharge cycle of compressed air energy storage. An electric compressor charges a pressure vessel, and the stored air drives a pneumatic motor to generate electricity on demand. Instrumentation measures round-trip efficiency at three pressure levels.

A tractor-mounted seed drill mechanism with a metering wheel that dispenses seeds at a controlled rate into furrows cut by a fixed-point opener, covering them with a press wheel. The metering rate is adjustable for different seed sizes, and a row counter provides planting statistics on a small LCD panel.