سلام دوستان
به این عکس ها دقت کنید ببینید چگونه می توان با وسایل ابتدائی یک قاب شیک برای آمپلی دستساز خود تهیه کرد .تشکر
[h=3]Audio Amplifier[/h]
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به این عکس ها دقت کنید ببینید چگونه می توان با وسایل ابتدائی یک قاب شیک برای آمپلی دستساز خود تهیه کرد .تشکر
In fact, all e-detail was found at home, specially bought only chip amplifiers and switches with connectors for headphones. The boards made and designed myself, except that - that for the indicator, that I found online. Since I already have some experience in the construction of electronic devices, for me it was not difficult. Even I would say it was interesting to remember his youth.The radiator is found in the bins from what is an old amp. Few had neutered (much was too big), long runs at maximum capacity, I was satisfied with the result. Heating is not critical, even I would say not very strong and this is despite the fact - that on the same heatsink I posted a voltage regulator circuit for the amplifier. The photo can be seen they are. Total costs 7 pc, a holding 1A obtained with 7A. Amp voracious when measurements showed a current consumption of 5A.
Then settle down power, the screen is specially made from tin to eliminate crosstalk and interference from the voltage regulators (the current is not small, but power was very sensitive and I decided to play safe).
Mounted amplifier IC TDA 7265 compiled for the scheme with minor modifications dashitu for their needs, Lupita is not fair 2h25W HI - END of course but for the company to soup was happy enough in the end if you want what is more serious in a computer is a digital output, and it can be skonektit with the receiver. Relay AC commutes (the button on the toolbar only includes relyushku). It is not unreasonable due to the fact - that the contact with the relay is more reliable than that of the switch. I know this is from my own experience ....
Headphone amp made a separate little bit too big for 2h5W power of course, but 100% will pump any headphones, listening to powerful big headphones left a positive impression, the chip is heated at high volumes strongly enough so that the final assembly and then when I think to stick a small heat sink of sin . Separate amp I did because I did not want to present in the audio path constraints such as resistors, etc. which would have put if you take the signal from the main amplifier. And then the signal after amplification is fed to acoustic radiator, without limitation, that positively affects the quality of course.
This is a simple control circuit indicator output ... I've found on the network by accident, at first wanted to build on the specialist for this chip K157DA1, but unfortunately the result of running to Radio Shack and I did not give Skidan circuit transistors. The scheme of what is soviet tape ...
This wiring board power supply. Just stand on it relays for switching power supply (I did not bother with electronic keys decided to go the easy way). Stabilizers on a makeshift heatsink 12V to power the headphone amplifier and a second at 5V for LED illumination.
A set of parts for the power supply. The body of the printer which is found to the "good things" at home, drove korefan transformer (by the way he had a special thank you for such a drop dead .. trance element despite its small size for continuity showed unexpected results: it is stable at 25V without heating figachil 10A! !) The photo also highlighted the starter relay from the car. Also found at home, they are supposed to include the power to the computer. Take a company with a 12V, and voila! .. This is not to bathe each time with the amp on and off, it will be controlled from a computer and work in sync with him. For normal operation, without the company put on the back of the switch to short the relay contacts and excludes it from the circuit.
Installation of power supply was very tight.
[h=3]Housing.[/h]
Since the body had to be tricky, but since this product is the person it was worth it.Chipboard is found again in a pile of trash on the balcony, the rest of what is left of old furniture and a good thing and can be useful ... that actually happened.
To saw the details of size, all rolled up on the screws.
Joints before assembling missed glue for reliability.
Cut out holes for the controls and displays.
The raw edges do not look much. Fraser made manually processing ends.
Had to handle several calls to get the perfect uniformity of all the faces.
For fixing the rear wall mounted bars, a large margin from the edge was made for - to hide the heat sink and all the wires and switching elements, etc. Due to this, the amplifier can be placed close to the wall.
Passed the stages of putty and paint, putty Shpatlevanie polymer produced with the addition of PVA glue for a good hold on the surface soil layer after each course. Painting with paint and then varnished with lacquer NC NC. Subsequent polishing polishing paste coating and finishing polish for the body car.
The result was a beautiful polished surface, which was steeper than the piano or piano.
[h=3]Contact Panel[/h]
Switches and sockets at least, only the most necessary. Why the extra bells and whistles power amps? All settings are in sound card company.Switch "Network". Switch loudspeaker, the signal to the headphones a constant independent of the included speakers, or not - this is also part of the conceived plan. Now you will not find an amplifier with such a scheme, even serious Receivers are doing on a "stuck the headphones and there is no signal to the speaker," and had all the amps were made precisely such a scheme, as I did. I do not know to whom it may conveniently and vice versa, but for me such a scheme of distribution of signals is very urgent.The holes for switches selected bits of wood. Just choose a larger diameter crown skirt around the hole in order to emphasize the illuminated switches (scratched and raw organic surface refracts light).
Set as headphone jacks. And the need of different diameters Jack 3,5 mm Jack 6.3 mm so you do not bathe with all kinds of adapters. Which is a plug headphones and quietly so no zamorochek-sticks.
Painting first silverfish for uniform dispersion of light, and then paint so as not to highlight all that is around the socket.
4 Svetsik and that the final result into the headphone jack is also on the LED for the overall picture.
[h=3]LED output[/h]
The indicator would make the lights look like a well-known amps of my youth. Inspired by memories of the tumultuous times, went to work.Stylish light that we would like, it was not possible to buy. It was decided to carry out his own, from a specially purchased Chinese testers. Of those recovered milliammeter, red arrows painted in black.
Housing made of the fact - that came to hand in a pile of trash on the balcony.
The scale is drawn in front of the program designer, with subsequent modification in the Corel Drava, because the first sucks friends with different fonts, and it was necessary to write more interesting.
Protective caps for the mechanical parts are made of the indicator necks of beer bottles (boobs), as used successfully in the process.
Already narisovyvaetsya overall picture of the future product.
Trying indicators. Then they cleaned out before the final assembly of the device (a very delicate details, it is easy to mess up).
To control the voltage amplifier is soldered to no effect on the audio path and the work was correct. Check for - all zashibis, works fine. The scheme is found in the network from which a soviet Soviet mafona, in my Spring I did not memorize.
Watch as the lights turned out, glued fibers of plexiglass, glued them to the light-emitting diodes, or anything unusual.
That scale is the inscription mr. Kolesov - this is my last name on the modesty will not die ... Yes, and what would you do .. copy the name of what that brand in my silly. And so unusually well, and pin the friends you can ...
[h=3]Volume control[/h]
The regulator would like to make a classic course, a big round, does not necessarily push .. To make contact with, and felt that the rotation maesh thing and not some Chinese toy stuff ... At the encoder setting I have ceased to exist, needed the lights of the handle and rotate endlessly with the wire it will not work. In general, I did not bother and decided to make a variable resistor. In the end, if you will change it shkripet 5 seconds.And so to bring to your attention - the next perverted ..Poshukav the house came on the tube of cream. After talks with his wife, she presented to me by a cover for further mercy.As planned by the planned lights on the handle to be easily and quickly determine the position of the regulator (this is especially true in the dark). Drilled 1 mm behind the further fastened Svetik.
In the middle of the epoxy glued to the handle of which is an old tape recorder or receiver (was found in the bins), it came up as a native for a variable resistor.
In the epoxy sadim LED, pre-pasted it with foil (he is very bright, I did not want it shone through the walls of the handle), at the same time leaked into the hole excess resin to form a fiber, hides stains and the surface is completely smooth, it is very difficult to guess where the hole until it zazhzhesh Svetik.
After solidification as a check on the strength of this supposedly sitting sleeve ... all fun and hard ... you can continue on.
I decided to paint the inside of silverfish (paint with aluminum powder), it seems to me that the type will reflect the effect of a difference though I have not noticed.
Soldered wires and dropping resistor, I poured the whole thing epoxy leaving little space for free movement of the wires during operation. The handle has acquired the stiffness and weight ... stone .. Just paint silverfish.Sanding fine sandpaper so you do not peeling paint. For a rough surface will normally stay even though - this is polyethylene and the painting is actually not be.The first layer of paint. Svetik included, to admire the result. Was satisfied.
The scale is made in the program designer and front lettering and symbols in Corel Drava. In the designer, so do not get enough options.
Printed on glossy paper, the scale is placed between 2 sheets of organic, all linked to the subsequent stages of work.
At the ends glued to illuminate the LEDs, and all painted so that no light is scattered on the body and illuminates the neighboring elements such as LED lights up .. white light and would not like that the light is mixed.
[h=3]Feet for the amplifier.[/h]
Props for this article agreed to be done in the classical style of radio design - chrome, but with a little twist ala UFO. At the bottom of the legs planned for blue light.It was done out of order - which was also on the balcony in a pile of junk. Chrome 25mm furniture tube, organic 3mm (drove korefan) Svetik certainly go buy + glue (super glue and epoxy resin).
Billets cut and glued them glued Svetik, wrong for the transfer of flux, but more on that later ..
A layer of organic round shape is designed for that - that then fill with epoxy .... does not leak from the pipe billet is put firmly on the ground.
Poured glue into molds, and parts are waiting for further treatment after curing the resin.
Sam semiconductor element is initially fixed with hot ....
Details have dried up. Produced treatment. Excess acrylic is removed, the edges carefully polished so as not to damage the chrome on the metal part of the legs.
It looks like much more fun, but it's not all ...
Test run Svetikov not impressed and decided to make the diverging lens .... The light falls on it, and scattered in different directions.
This is the initial appearance without the lens.
In this combo photo see the effect of dispersion, made by a simple manipulation of the drill ...
All parts are made in a similar way.In the final stage of the rubber pads were made from a bicycle camera ..... for the laying of aluminum foil glued to the inside, (for reflection), all glued together with a clear point.
A brief description of the amplifier and its characteristics:Power 2h25W, placed on the TDA 7265 chips - is the main amp, TDA 1517 - a headphone amp 2h5W is key. Superiority of its course are obvious, if only in terms of output power. But I did it, not only for the ears, similar instances of which are for sale do not meet my needs at all .... and including the ease of operation. For example, to connect headphones with thick plugs Jack 6,3 mm, this whole saga even with adapters and stuff, not to mention the fact that they can not fully with decent quality headphones are quite simply pump. The appearance of a purchased product is poor and wants to remove those boxes under the table so that they do not see any when, where inconvenient to include this power does not have this drawback, because it turns on and off in sync with your computer. All lights turned off button on the back so as not to interfere with using the computer in the dark, after the next turn, it automatically again. The buttons on the front of the "network" and the opening and closing speakers.
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All parts are made in a similar way.In the final stage of the rubber pads were made from a bicycle camera ..... for the laying of aluminum foil glued to the inside, (for reflection), all glued together with a clear point.
