Today on the network are discussing a few ideas on how to make a music center with your own hands. On our portal we decided to keep up with life, put our ideas together, and present the result to the attention of readers. It captures the idea that it is possible to assemble a workable music system from a single purchased and inexpensive part with the participation of old rubbish. The craft mates with an amplifier, for example, for an electric guitar. As often happens in life, the main task: to collect the scattered parts, as well as to protect the equipment from misuse. Let's see how to make a music center with his own hands.
Do-it-yourself Music Center
What to build an
music center At the core of inventions is the ability to use someone else's parts to create new things. For example, microcontrollers have long been part of a complex hardware, but never before has their use looked so simple as at the beginning of the XXI century. Embedded microsystems allow you to play a lot of formats, including flash memory cards. This allows the use of chips to decode the signal. The majority cost 1000-2000 rubles and are supplemented with a control panel.
Power supply for devices: +5 or +12 V, which makes it easy to interface digital equipment with a standard computer power supply. Amplifier ICs are available on the counters of online stores and metropolitan markets, it is possible to separately type equalizers and other elements of the music system together with adjusting knobs. This allows you to design acoustic conglomerates according to your own needs.
In YouTube video, the possibility of creating an independent music center from the MP2896 embedded micro system is discussed. On sale a lot of others. Plus a choice. Use the old music system properly. It is known that contemporaries no longer needed cassette recorders, the two lower decks are removed together with the head of the preamp and other unnecessary things. Inside there is a radio with a disc player. By the way, replace the latter with a DVD drive, the only hitch is in format recognition.
Instead of decks, it remains to put a pair of modern broadband speakers to get some sort of boombox. Plus in the beautiful appearance, convenient adjustment elements, the absence of external speakers. Inside there is a power supply, an extra big plus. The old technology did not know the USB standards, therefore, an integral part of the procedure would be the embedding of a card reader or an integrated micro system like the one mentioned above. Our readers will see some new products on electronshik.ru, where prices are also displayed. We give the characteristics of MP2896:
MP2896
- Supply voltage +5 V.
- Allowable variation of supply voltage ± 0.25 V.
- Current consumption 100 mA.
- Connector Type MU 2F, MU 3F.
- Type of PCB connectors MW 2M.
- Input interfaces SD, FM, USB, AUX.
- Digital Clock.
- Four equalizer settings.
- Input and output voltages for information channels are 0.25 - 0.5 mV.
There are restrictions on the file system of the media, remote control. As a result, we see a device with a supply voltage of 5 V, which reads flash drives, receives broadcasting, and passes a formed external sound through the equalizer. It remains to add here a low-frequency amplifier and speakers to get a workable system.
The power supply of the home-made music center
. The power supply voltage of the computer power supply unit is ideal for the designed modern devices, +5 and +12 V. The micro system is powered from the first line, and the battery is charged from the second( you will need to buy it).In the absence of a network, the music center operates autonomously. To provide the required 5 V and not to overheat the microcircuit, on sinava.ru a ready-made 12-5 V DC-voltage converter circuit is presented.
LM7805
The figure shows that the LM7805 chip converts the voltage to the desired format. Condensers are soldered to filter harmonics. Electrolytic have breakdown voltage of 25 V, other( with straight plates on the diagram) - 50 V. Do not forget to put elements with the correct polarity. In the diagram, for convenience, the positive electrodes of electrolytic capacitors are indicated by pluses. And it is better not to turn on the microcircuit on the increased voltage in order not to overheat.
Other interesting things: on YouTube they propose to make separate power toggle switches in the music center for the low-frequency amplifier and the embedded micro system, to hold the jack connector to the amplifying stage. As a result, it becomes possible to use the box in the form of an amplifier for an electric guitar. What inside to add chips for effects, think for yourself. It is not prohibited to use the aux input at the same time. This gives a chance to play along with your favorite artists or sing karaoke. Accompanying, of course, must already be present on the flash drive.
Please note that the low-frequency amplifier is very hot during operation. The host chip should be located on a large radiator made of aluminum or another metal that conducts heat well( copper).On a similar basis, it is possible to isolate the desired element from the construction of the factory old music center: you are looking for the most heavily loaded( with a massive radiator) key, most likely the most necessary.
From here go the wires to the speakers. Follow the tracks on the circuit board with an armed or naked eye.
It remains to understand what kind of supply voltage was used in the old equipment to put everything together. We need to calculate the input and output voltages:
- We believe that the professionals designed the devices on the basis of generally accepted standards in order to assemble complex systems in cubes.
- In case of over-amplification, this is audible due to sound distortions generated by the meander. Any music in such a performance is reminiscent of thrash metal, the cut off tops at the exit of the transistors from the linear mode is hard not to notice at the hearing.
- Element base of modernity supports a wide range of signals.
By the way, from the Soviet portable tape recorder, take the power supply( if the computer does not suit).It’s not a fact that the indicated voltages exist there, but we have already brought the 12-5 V conversion circuit( you will find others by analogy).We believe that it is possible to get something similar for each case. Do this, the computer power supply is not lightweight, therefore, it is not enough to carry pleasure iron. The PC unit is designed for power consumption above 350 W, which is simply not useful by definition in a home-made music center.
FM modulator
Music center on the FM modulator
Today, motorists are offered an interesting feature: listening to flash media through the receiver of the machine. A keychain is used where the memory device is connected. Then the FM modulator works like a walkie talkie. It radiates radio waves that the car's receiver can catch. Both devices are tuned to an arbitrary FM frequency, the present listeners( owners of receivers) nearby enjoy the content from the flash drive.
The invention is based on the low transmit power. However, it is sufficient for the components of the music center to work in concert. FM modulator is used to create autonomous systems. If you assemble a music center, having included a receiver( any old, Soviet), you will be able to listen to flash drives on decent speakers, even in a car. The gadget is powered by a cigarette lighter, the battery is suitable as a source, just like a computer power supply.
It is possible to make a stereo yourself, as indicated, if an FM modulator has already been purchased. The amplifier does not need to be added, the receiver is embedded. But to work on large speakers extra cascade does not hurt.
Do not forget that the speakers are carried with e-filling for good reason: the radio equipment does not like vibrations, especially the powerful low frequencies. For this reason, assembling electronic components in one box is not the best idea. Ideal to stick in a box a couple of speakers from an old tape recorder. We believe that the loudspeakers are adapted to get on with electronics without mutual harm.
Note! For clever men, who underestimate the role of vibrations, we recommend reading about the causes of the Columbia shuttle crash in 2003.
FM modulator can be obtained for the price of about 300 rubles. If there is an old receiver and will be able to assemble a low-frequency amplifier, definitely try. Any Tourist will do. If a station appears on the working channel of the FM modulator, you just need to rebuild it and the receiver. This is not very convenient with the constant change of broadcasting zones.
