35 Pages
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5,041 Words
Aim: This main aim of this work is to build a simple fire alarm. Fire alarm is an electronics device that is stored in a building to detect the presence of fire accident. An automatic fire alarm system is designed to detect the unwanted presence of fire by monitoring environmental changes associated with combustion. Method: The device was first built on a breadboard which is later transfer to vero board and soldered. Result: The devi […]
40 Pages
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5,750 Words
An electric standing fan includes a fan shaft driven by a fan motor supported by a motor support. An oscillating device includes a rotational shaft connected to the motor support for driving the motor support to oscillate. A transmission gear has an axle connected to the rotational shaft and a gear wheel mounted around the axle and driven by a synchronous motor. An oscillating angle limiting switch detects a rotational angle of the rot […]
42 Pages
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6,731 Words
Countries like Nigeria are plagued with erratic power supply that has lingered on for decades. A major feature of the Dry Season in Nigeria is thermal discomfort which is more pronounced at night due to lack of electricity from the Power Holding Company of Nigeria to operate AC powered electric fans. This research work describes the development of a rechargeable electric fan that operates on a 240V AC power source as well as a recharge […]
50 Pages
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7,174 Words
Energy crisis and environment deterioration are two major problems for 21st century. Thermoelectric device is a promising solution for those two problems. Thermoelectric generator (TEG), is device that convert heat energy into electric energy. This generator accomplish this task by using arrays of specialised circuits known as thermoelectric modules, each of which consists of semiconductor materials -- known as p-type and n-type -- san […]
41 Pages
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5,588 Words
Sometimes we forget to switch off the bathroom light and it remains on unnoticed for long periods. This circuit solves the problem of electricity wastage by switching off the lamp automatically after 30 minutes once it is switched on. The back-up LED lamp provided in the circuit turns on for three minutes when mains fails. This is helpful especially when you are taking a shower at night.
52 Pages
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8,187 Words
The guard is also susceptible to sleep at times. It was then that home security system based upon electronic circuits were developed which proved to be highly reliable and were appreciated by the people as they were relieved from constant monitoring of their homes. An intelligent Home security system is a monitoring device that monitors and alerts the user via SMS in case of a burglary attempt or fire accident at that place – house or […]
47 Pages
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7,059 Words
This project work deals on the design and construction of an IR based remote control for an electronic/electrical device say electric lamp with the aim of switching on/off of the lamp at discretion and from a distance. It also eliminates the inconveniences associated with manual switching of bed lamps. This electronic system is designed in two functional units; the transmitter and the receiver using IR communication wave band. The tr […]