HEADPHONE AUDIO AMPLIFIER
Today we will make an audio amplifier for low cost headphones and very good audio quality
Supplies
SCHEMATIC DIAGRAM
This headphone amplifier, in addition to its conventional use, can be connected to the output of the signal adder, to monitor the sound that comes out of the console. You can also use it as a preamplifier, when the computer signal from the video jukebox is very weak.
Another great feature is its use in video jukeboxes with a laptop that carry the amplifier in the speakers or speakers. This strengthens the signal and thus prevents the filtering of noise caused by the long path of a weak signal from the computer to the speakers. It was used in the jukebox of our old cover, since this jukebox has the amplifier outside the cabinet.
As you can see this circuit is very simple but very useful for our projects there you can see the electronic components that were used and designed in the EASYEDA software and it works very well
FUNCTIONING
.jpeg)
This project is powered by a voltage of 12VDC and its input is the audio jack tip, that is to say that from a computer or cell phone we can amplify the audio and at the output we again have the output to headphones. This project works very well and has a good quality. very professional audio
The TDA2822M integrated circuit is a stereo amplifier in an 8-pin MINI-DIP package. Its most frequent use is in radio amplifiers, small game consoles, home computer speakers, among others. It can work with voltages from 3 volts to 12 volts DC. Of course, if we plan to use it as a headphone amplifier, it is not necessary to use such high voltages. 5 volts is more than enough. We can also feed it with the voltage from the computer's USB port. In the same way you can work with speakers and with the 5 volt voltage that the USB port of the computer delivers.
We will obtain an acceptable and pleasant sound.
The zobel network consists of a 4.7 ohm resistor and a 0.1 uF capacitor (104). These two components go in parallel to each output, and in series between the two of them.
On the other hand, the 10K resistor that is on the right side is to discharge the voltage when the amplifier is turned off and thus avoid long noises when removing the current supply.
ELECTRONIC COMPONENTS
- 2 AUDIO CONNECTOR
- 1 POT DUAL 20K
- 3 RESISTORS 10K 1/4W
- 2 RESISTORS 4,7ohm 1/4W
- 1 JACK DC
- 1 CAPACITOR ELECTROLITO 1000UF16V
- 2 CAPACITORS ELECTROLITO 22UF16V
- 2 CAPACITORS ELECTROLITO 220UF16V
- 1 CI TDA 2822
- 2 CAP 100NF (104)
- 1 PCB
CHARACTERISTICS
- VIN 12VDC
- IMAX 100mA
- COMPUTER OR CELLPHONE AUDIO AMPLIFIER
- PROFESSIONAL SOUND
- ECONOMIC CIRCUIT
- EFFICIENT
EASYEDA
Once the project is finished with all the respective tests, we carry out the PCB design and we will obtain the routed tracks and the 3D image of how our finished PCB would look.
JLCPCB
.jpeg)
Once the pcb is designed, we will send our friends from JLCPCB to manufacture our PCB.
5pcbs only $2
JLCPCB number 1 PCB manufacturing company worldwide professional pcbs and excellent finish.
GERBER PCB:
https://mega.nz/file/rcQygALY#JPti-JQtI5FFZW6P4d8067lo4lf0wwkija-Vd8xHenc
you can get your pcbs in different sizes and colors.