Advantages and dis advantages of electronic voting machine

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Advantages and dis advantages of electronic voting machine

Just type and press 'enter' Search for: Electronics Projects — Engineering Mini Projects john July 31, Comments CircuitsToday is listing some free engineering mini projects that can be presented and designed by students for their exams.

Though the electronic circuits may look complex, they are explained in detail along with a circuit diagram, and are explained with links of all devices that are used in the circuit. Please note that these projects are meant for students, hobbyists and enthusiasts. If there are any doubts regarding the circuit, feel free to comment on the post.

You can also bring in any modifications you want, and ask us if you have doubts. Furthermore, please go through the existing comments to get a better idea of the electronics mini project topics. Top Electronics Projects for engineering students 1.

Street Light Circuit This minor mini project is used to design a street light that brightens up when night falls and automatically turns OFF when daylight comes in. In order to detect the amount of light that is needed to decide when to cut-off the circuit and later activate it, this project is done with the help of a sensor called Light Dependent Resistor LDR.

The main principle used behind the LDR is that the presence of light causes the resistance of the sensor to go low. You can modify the circuit by placing LEDs instead of the volt lamp.

To know more about it, check out the comments given in the circuit. The circuit is comparatively easy to design, and further modifications can be made according to your choice.

Here a simple circuit that can be used to charge batteries is designed and created. The circuit consists of basic transistor switching methods and the components are cheap and are available in all electronics shops.

A detailed description of the post is also given, which will give you a better idea. Air Flow Detector Circuit This simple mini project is used to design an indicator to show the rate of air flow in a given space.

The air flow is sensed with the help of an incandescent bulb filament. The variations due to the change of resistance in the bulb due to the air flow are given to the input of an LM operational amplifier. The circuit diagram and a better description of the circuit are given in the post above.

Further modifications can be brought to the circuit and some of them are given in the comments section. This circuit uses a basic astable multivibrator made from a timer IC. A resistance probe is set on a point at which the alarm is to set ON, as soon as the water rises up to that level.

A detailed circuit can be seen in the post above.

Advantages and dis advantages of electronic voting machine

The number of components needed for this circuit is very less and can be easily assembled on a PCB. Low Cost Fire Alarm Circuit This circuit can be used for detecting a fire and producing an alarm, thus alerting the people in the building where it is installed.

A transistor sensor called BC is used to sense the heat produced due to the fire.

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A preset level can be kept for the transistor. As soon as the temperature rises above the set preset level, the leakage current of the transistor rises, thus driving the other transistors in the circuit. A relay is also used to switch the bell load as its output.

The components needed for the circuit can be obtained easily and the circuit is easy to design. There have been many complaints that the IC is obsolete. Please check the comments to know the exact site to buy the IC.

For a more detailed explanation about the FM radio circuitplease check out the original post. The circuit can be easily designed and assembled on a printed circuit board. Further instructions and detailed working can be obtained from the original post.

High and Low Voltage Cut-off With Delay and Alarm This circuit can not only be presented as your mini project but can also be applied to your home electrical equipment to protect them from overvoltage fluctuations. The circuit requires very simple components like a monostable multivibrator using a timera few transistors, and some diodes, relays and LED.

The detailed explanation is given in the post above, and if you wish you can easily modify the circuit to make it an automatic voltage stabilizer. The output of the LDR is given to the inverting input of the comparator. The resistance remains high when there is no light and the resistance drops as soon as light falls on it.

This lessens the voltage at the inverting input and thus the comparator produces a high output which turns a transistor and thus the relay on.Sports journalists and bloggers covering NFL, MLB, NBA, NHL, MMA, college football and basketball, NASCAR, fantasy sports and more.

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