Simple Audio Amplifier
Making a simple sound amplifier with your own hands. We will need the following: 1) Coil: L1 5 μH 2) Resistors: R1, R3 2.2 kΩ; R2, R5 22kOhm; R4 680 Ohm; R6 2.2 Ohm; R7 10 Ohm. 3) Capacitors: C1, C4- 4.7 μF-25V; C3-22 uF-25V; C3-22 uF-25V; C5-0.47 μF-25V; C6, C7-1000 microfarad-35V. 4) Microcircuit: DA1 TDA2050 Also for soldering it is necessary to purchase: ceramic soldering iron, solder, fiberglass laminate, ferric chloride, flux (rosin), speaker (for testing amplifier performance), 10 V power supply (“crown”), wires, connector, radiator (at first the chip will not heat up much, but cooling is recommended), glossy photo paper. Now the most interesting thing is preparation for work. Here is the diagram of our device:Now we need to do the wiring that is easiest to do in the sprint layout program. After the wiring is ready to print on our photo paper (the printer must be a laser!). Then we impose a printed fragment on our board and iron it for 5-10 minutes. Then we lower it under water and with light movements we clean the paper. Now we need to etch the board.To do this, we take ferric chloride and add it to the slightly warmed water and dip the board there (in no case do not use dishes intended for eating!) The etching process takes from 10 minutes to 5-8 hours, it all depends on the amount of solution and temperature water. After the board is wicked we scrape off the paint layer, as a result of which our paths will become copper. Now we have to solder the elements. First, we drill holes for our elements, after which it is recommended to lubricate the tracks with flux. After that, according to the scheme, we insert all the elements and solder them. At this, our work goes into the final stage, the test for performance.By connecting the power, the speaker and connecting the jack to the device with a connector 3.5 mm, you will hear your favorite music. For convenience, you can come up with a case for your device, an example of the case you can see below.
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