Investigatory Project
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Investigatory Projects in Engineering

Potential Use of Oyster Shells in Ceramic Production

This study focused on the possibility of replacing silica in ceramic production with oyster shells. Powdered oyster shells were used instead of silica in the production of ceramics. The texture, color and durability of the ceramics were compared to those made with silica. Six kilograms of Vigan clay and 2.5 kg of ball clay were mixed and soaked in water overnight. The following day, the mixture was kneaded again and filtered. The mixture was placed over Plaster of Paris for the water to be absorbed.

The solidified mixture was then rolled and compressed to let the air escape from the spaces inside the solidified mixture. After this, the mixture was molded, air dried for four days and fired in a furnace. Three trials were made at different temperatures – 900 degrees Celcius, 950 degrees Celcius and 1000 degrees Celcius. The finished products were compared in terms of texture and color to those made using silica.

Soundcard as Analog to Digital Converter

PC based water level control system using soundcard as analog to digital converter. Water level controllers ensure that appropriate amounts of water or fluids are dispensable or maintained in various agricultural and industrial applications. However, they are extremely expensive, costing as much as US$1,695.00 for flexible and programmable units. The main cost accounts for data acquisition cards and software.

The study developed a PC based water level monitoring and control system using the computer sound card as the analog-digital converter. The water level was monitored using silver rod (Cu-Ag alloy) as sensor. An electronic signal generator circuit was fabricated to produce the sine wave signal analog equivalent to the silver rod resistance changes for input to the computer.

GLEAM: Eluding Perceptual Errors in Driving

GLEAM (Glaring Light Emission Auto-Minimizer): Eluding Perceptual Errors in Driving. The rapid evolution of technology shows a rapidly changing world. Cars are among the most common indicators of advancement benefiting the super busy people. However, advancements do not warrant freedom from accidents. Research shows that glare is a common cause of errors in driving. Humans normally adapt to light levels. When a bright light suddenly appears, visibility is affected. This problem with glare is encountered at nighttime when the driver is adapted to lower brightness.

Glare headlight Emission Auto-Minimizer (GLEAM) a modified twelve volts device was mounted in a car to prove if it actually prevents car accidents especially at nighttime. This device is a light sensor which, upon detection of high-intensity light, stops current from flowing to the high-beam and allows current to pass through the low-beam.


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