At the present time, the sensors used in the healthcare are playing a vital role in hospitals. The patient observing system namely “An automatic wireless health monitoring system “is one of the main advanced due to its innovative technology. This system is used to calculate the temperature of the patient’s body & heartbeat by using embedded technology. The sensors used in the proposed system are a temperature sensor and heartbeat sensor. These two sensors mostly used in monitoring the condition of the patient.

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We must have seen the dancing LEDs in discotheque or DJ lights, which Turn ON and OFF based on the music beats. These lights blink according to the volume and length of music beats. Basically, these are intended to choose the high-intensity sound such as Bass sound. So these lights go after the high pitch beats in tune like drum beats, and Turn ON & OFF based on the music pattern. In the past, we have built Dancing LEDs, which just goes to a set pattern and we can only manage the speed. Now we are taking this to next level, i.e. Music Tone Operated Dancing LEDs, in which light emitting diodes will blink according to music beats like a Disco light. This Musical LEDs system is very simple and easy to design, it just requires few basic electrical and electronic components and it appears very cool.

Music Tone Based Dancing LEDs

The proposed system is implemented in such a way that the lights blink according to the musical tones. This music operated running LEDs circuit uses integrated circuits. The music tones are detected by a condenser microphone which is then amplified by an IC. The o/ps of the IC are fed to the transistors to make the bulbs blink or dance as per the music played.

Hardware Requirements

The hardware requirements of music tone based dancing LEDs include decade counter IC, op-amp, transistors, potentiometers, condenser microphone, diodes, led’s, capacitors and resistors.

Battery

An electrical battery is an arrangement of one or more electrochemical cells, used to change stored chemical energy into electrical energy. The battery is a common power source for numerous applications like a household, robotics, and industrial applications. Larger batteries give standby power for telephone connections or computer data centres.

1N4148

The 1N4148 is a standard small signal silicon (Si) diode used in signal processing. Its name follows the JEDEC arrangement.

OP-AMP

An operational amplifier or op-amp is a DC-coupled high-gain electronic voltage amplifier with a differential input & a single-ended o/p. An operational amplifier generates an o/p voltage that is usually thousands of times larger than the voltage difference between its i/p terminals.

The circuit symbol for an operational amplifier is shown, where:

• Non-inverting input
• inverting input
• Output
• Positive power supply
• Negative power supply

Condenser Microphone

• Condenser (capacitor) is an electronic component used to store energy in the form of an electrostatic field.
• Actually, the term itself is obsolete but has fixed as the name for this sort of microphone, which employs a capacitor to change acoustical energy into electrical energy.
• The resultant audio signal is a stronger signal than that from a dynamic.
• The electrets condenser mic uses a particular type of capacitor which has a stable voltage built in during manufacture.
• This is somewhat like a stable magnet, in that it doesn’t need any external power for operation.

Audio Level Indicator IC (CTC1403)/Decade Counter IC(4017)

In electronics, counters can be executed quite easily using register type circuits like FF (flip-flop) and a wide variety of types exist. The 4017 decade counter has 10 outputs which go HIGH in series when a starting place of pulses is connected to the input of the CLK and when appropriate logic levels are applied to the inputs of the RESET and ENABLE pins.

Inside The 4017

Essentially, the logic state of the D FF or data i/p is transferred to the Q o/p on the rising edge of the CLK signal.For a shift register, the CLK inputs of all the D-type stages are connected together so that all the FFs are clocked at the same time.

The diagram shows how the Johnson counter outputs can be decoded to give a 1 of 6 outputs:

Music Tone Based Dancing LEDs Working

The proposed system is projected to design musical tone based dancing LEDs those light up in synchronization with the music beat played.

This project is built with a microphone through which the tone is picked up and amplified. Then this signal activates a series of LEDs through an intermediate circuit. Hence, blinking of LEDs happens when an audio music continually changes its beat. As a result, a musical sequence of changing LEDs shows with the varying beat of the music.

In future, this system can be improved by using TRIACs and Opto-Isolators to use high power lamps instead of LEDs.

Thus, this is all about music tone based dancing leads. We hope that you have got a better understanding of this concept.Furthermore, any doubts regarding this concept or to implement any electrical and electronic projects please give your valuable suggestions by commenting in the comment section below. Here is a question for you, what are the applications of dancing LEDs?

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At present, almost of the public having their own vehicle, burglary is happening in insecurity places like vehicle parking, driving, etc. The protection of vehicles is very necessary for public transportation. The vehicle is tracing and security system fixed in the vehicle to trace the place and locking the vehicles engine motor. The location  of the vehicle recognized using Global Positioning system and Global system mobile communication. These two systems continually watch a moving vehicle and report the position on request. When the burglary recognized, the responsible person sends an SMS to the microcontroller, then microcontroller issue the control signals to halt the engine motor. Authorized person needs to send the PIN to controller to restart the vehicle and open the door. This is more protected, trustworthy and low-cost.

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India is the largest democratic country in the world. Active involvement of the public in the formation of the government is an essential aspect of a democratic government. This is confirmed by an election. Conducting elections in a populated country like India is a difficult task. It’s a test to conduct elections for collection of candidates to signify the people of the country at different levels. Even more important is the timely announcement of results. This is required to bring steadiness in the governance and stable financial growth of the nation. To overcome this problem, An EVM (electronic voting machine) is an answer to all these complications. In the worldwide, several countries have shown their interest in learning the mechanism behind this powerful machine. It’s got a very simple interface, its tamper proof, avoids the fake voting and it has helped in receiving rid of the time consuming duty of counting.

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Learning in your classroom course introduces you to get started in the making and development of your school projects. While you may select to use any of the project ideas, they perfectly should be used as springboards to guide you in building your own activities. We have kept them wide so that you can work out the details. Keep in mind that the following stem kits should be ongoing throughout the school year and these kits can be multi-disciplinary. Be aware that many of these projects may have overlapping focuses both on the truths they are investigating as well as in the assets that they use. In order to support, school students discover issues that are exact to themselves, one must first search the basic similarities and common needs of the electronics projects for school students. The study of the basic requirements is crucial.

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