ME Projects

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Cant reveal much about the last few years so heres some older ME projects...

IPAD BUTTON TESTER RIG DESIGN

A button testing rig design for a recent mechatronics design challenge.

Designed using Onshape CAD tool. The rig tests press force, fatigue failure and button travel over tens of thousands of cycles.

Strain based load cell, pneumatic actuator, linear resistive encoder and a linear bearing form the main mechanism

A throttle valve and a pressure control valve can be used to limit speed and force exerted on the button.

Enclosure for Smart Fridge Electronics

Ongoing - Injection molded enclosure design to house electronics and camera for smart fridge project.

A quick concept of a small pipe fixing robot. Uses magnetic wheels to crawl and movable wheel mounts to change direction by 90 degrees. Wheels are allowed to pitch to conform to the inner circular surface of the pipe.

Tools used - CAD (Solidworks), rendering (Keyshot), 3D printing (SLA), Arduino, stepper drive electronics.

Pipe fixing robot

Step 2 O

A human powered water filter project at Stanford University in collaboration with Xylem Inc. and Aalto University, Finland.

Stepping is used to force water through a multi stage filtration system . Design of the filter allows for easy installation of the water jug and provides simple and safe backwashing for the filters.

Algae and chitosan were used to remove heavy metals like lead from polluted water. Algae was considered as a self sustaining pollutant remover particularly for remote places. Research was done to determine effectiveness of this operation.

Personal contributions included concept ideation, prototyping of the chassis and designing pumping system. Also took part in testing heavy metal filtration. Tools used - CAD, 3D printing, Laser Cutting.

ME 210 bot

This is a video of a basic task of the bot made in the ME 210 mechatronics course ( in a team of 4). Additionally the bot also had aim and shoot capabilities (point to IR source) but is not shown here because of a faulty stepper motor. The bot was made on the teensy microcontroller.

https://web.stanford.edu/class/me210/reports/w19/16/index.html

Personal Contributions included designing, prototyping and debugging the shooting system and making electronics for the IR source sensing and aiming system. Tools Used - CAD, Laser Cutting, soldering, Oscilloscope, Teensy Microcontroller, C.

Auto loop

Autonomously driving a VW Golf GTi in a loop with steering and longitudinal control using vehicle dynamics and control.

Programmed model and controller for vehicle in MATLAB and applied to the Golf GTI.

Longitudinal gain was very high as is apparent in the video...

Hybrid Bike

A petro-eletric hybrid motorcycle that switches between power sources at different speeds.

Built to increase the efficiency, off the line speed and reduce emissions/km of the standard motor cycle. An approximate 30% increase in efficiency was observed during a combined city and highway loop. Majority of which was within the city. Final undergrad project.

Personal contributions included building the electric powertrain, its' electronics and packaging.

HANDWRITING MACHINE

A plotter made from old printer parts, scrap wood run with an Arduino, grbl shield, stepper motor drivers and two new steppers and an old stepper from an ancient dot matrix printer. Made during second year undergrad.

Lets just say that it was far from perfect but it was a lot of fun to make. The goal was to build a writing machine that did my repetitive homework for me.

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