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North South University · 2008 to 2012
North South University projects
My BSc in Electrical and Electronic Engineering. The parts that carried into my career are measuring real signals, modelling them in MATLAB, and teaching communication labs.
Lab instructor
Part-time lab instructor at NSU from September to December 2012, 20 hours a week.
- ETE-131: analog and digital communication, including a fibre-optic link.
- EEE/ETE-321: modulation and bit error rate, with MATLAB and OPNET.
- EEE/ETE-311: op-amp circuits.
Thesis: reading a signal from the real world
A Piezoelectric Power Generation System Utilizing Railway Track Vibration, a two-person thesis dated February 2013. The subject is energy, but the method is the same one I use on live systems today: capture real data, analyse it and model the result.
- Capture. Measured train-induced vibration at a live rail crossing in Dhaka with phone accelerometers: 3 samples, producing 18 graphs.
- Analyse. Processed the vibration signals with FFT analysis, finding 10 to 30 Hz to be the useful band.
- Choose. Compared 9 piezoelectric ceramics and selected one.
- Model. Simulated the equivalent circuit in MATLAB and iCircuit: 12 piezo blocks in series with a smoothing capacitor, keeping ripple to 8.4%.
Calculated result: 2.16 W at 4.03 V per block, or about 86 W per 10 m of track with 40 blocks. This is a modelled figure, not a field-built system. A companion paper was drafted but, as far as my records show, not published.
Electrical services design
EEE 254 (2012): a residential and garage electrical installation with floor and conduit layouts, switch and distribution board diagrams, and load calculations, including conduit for internet, TV, telephone and CCTV.