How to make a microphone?
In this article I will tell you how to makemicrophone, because a really sensitive microphone can be done only with their own hands, more precisely - by remaking a standard microphone. Of course, many can argue with this statement, but not those who approached this issue seriously. Very often people spend a huge amount of time adjusting the microphone and selecting the best combinations of the PC sound card and the microphone itself. In addition, if you have a laptop, in most cases, the sound systems in such computers also leave much to be desired. Well, let's get down to business.
How to make a microphone yourself
In the construction of the microphone block, we willuse elements of electronics that have already served their time. Take the electret microphone from any old tape recorder or radio. If there are not any at home, then the microphone will come from a mobile phone. You can even use two microphones at once, this will allow you to significantly expand the direction of the sound. The signal from a microphone or microphones needs to be amplified by a low-noise transistor of type VT1, then the signal will be fed to an operational amplifier of the DA1 type. The output of this amplifier can be connected to both normal headphones and fed further to processing or recording devices (for example, a laptop or a stationary computer). We will power the amplifier from the battery of the old mobile phone. They (mobile phone batteries) are good in that the duration of the battery life of the microphone from such a battery will be tens of hours. And to charge the battery, use any USB port on your computer. Now about the amplifier. It can be completely left on the port permanently, since the charging current in this case will be very small. A wire with a USB connector can be taken from the mouse. At the amplifier output, it is best to use a 3.5 mm jack - the same as for headphones from the player. From the headphones, the volume control also fits, and the rest of the parts, for example, the SA1 power switch, must be made up of any small ones.
Microphone with your own hands: finishing touches
Now we place the components of the microphone onA small board made of fiberglass. Next, we glue a small piece of foam on the battery, and then put the board on top. Now we pull all this together with a good electrical tape and try on the regulator knob. After that, to eliminate interference and interference, we place our design in a tin screen, soldering it to the common wire. Note that the microphone or microphones need to be fixed in a piece of soft but dense material. Then in a piece of foam rubber we cut out a niche and insert the whole block into it, and from above we pull on it a cloth case. By the way, foam can also be used and one that is used to wash the car. Well, that's almost all - it remains only to make slots for the plug, as well as the volume control and the switch. I note that such a microphone will be much better than any factory products, excluding, of course, professional equipment. But the fact is that for such equipment you will have to pay several tens of thousands of rubles, and the cost of our product is a maximum of one thousand, considering that we collected it almost entirely from old parts. So, if you are not engaged in professional recording and you need a microphone for your personal purposes, then this homemade design will do just fine.
