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.
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.
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.
The 1N4148 is a standard small signal silicon (Si) diode used in signal processing. Its name follows the JEDEC arrangement.
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
- Positive power supply
- Negative power supply
- 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- Actually, the term itself is obsolete but has fixed as the name for this sort of microphone, which employs a capacitor to change acoustical energy into electrical energy.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?