The power of standard phone speakers is not enough for everyone. Many people like to listen to music very loudly. To increase the sound level, you need to make a special amplifier.
Before you make a column, you need to purchase the necessary parts. First of all, we buy the TDA2003 chip or something similar to it. Alternatively, you can choose K174UN14. Next, capacitors of different capacities are purchased: 10 mF (one), 100 mF (two), 0.1 mF (one), 470 mF (one). Their voltage should be at least 16 volts, however, it is allowed to use high voltage capacitors, but in this case the power consumption will be increased.
Before you make a column with your own hands, you need to prepare resistors. They will need only three: 10 Ohm, 1 Ohm and 1 kOhm. Of course, do not forget about the speaker and solder with a soldering iron.
When everything is bought, and the workplace is prepared, we proceed to the assembly. It should be noted that as an amplifier should choose a mono analogue. There are several reasons for this. Firstly, a mono amplifier consumes very little power. Secondly, before making a speaker for a phone with your own hands, you need to clearly understand for yourself that you need to organize such a volume so that it is of the highest quality and the battery can provide the device with a long working life.
The amplifier circuit should be checked, do not take the first one, as there is a chance of damage to the phone.
It is better to assemble the amplifier on a special printed circuit board, if there are no skills in its production, then you can use ordinary cardboard. Before making a column, holes are punctured in a flat sheet of cardboard, parts are fixed and interconnected by thin wires.
When the assembly is completed, proper cooling of the chip should be arranged. This can be a regular aluminum frame or a small plate that is screwed to the microcircuit with one bolt.
The power source you can choose three batteries from the phone, the total capacity of which should be no more than 11 volts. The optimal speaker for such an amplifier will be up to 8 ohms.
How to make a column yourself? It is recommended to try the speakers from the car. The 4-home analogue from the PIONEER music car system works great and produces wonderful sound.
The case of the new device can be borrowed from the old speaker, which is used for the computer.
We examined how to make a speaker yourself, but did not say the main thing: in a wooden case, sound is not absorbed, so the sound is better. Here,
lower frequencies are reproduced
, and the sound will be without unpleasant rattles and extraneous interference. In addition, high frequencies create strong fluctuations, so plastic with iron begin to make noise in time with the music. Few people like this addition.
The soldering of parts should not be delayed, it is impossible to overheat the elements, otherwise they will quickly fail, and the pleasure of the product will be short. It is important that there are no foreign objects in the workplace during soldering.