I needed to assemble a power amplifier. I have S30 speaker systems. Initially I planned to install a ready-made amplifier board into the case. After rummaging through the bins, I found the TDA2616 chip. I removed it from a non-working TV.
Board and circuit
I drew the board in the sprint layout program. The diagram is taken from the documentation. I will use unipolar power supply. I will make it using LUT technology.
tda2616-odnopoljarnaja.zip
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I etched the board, it’s quite compact. I am attaching the project file, it is in the “lay6” format.
Making an amplifier
Drilled holes.
The TDA2616 chip has a single-row design.
The microcircuit was mounted on a small radiator. I will screw the radiator to the body. The pins of the microcircuit are not connected to its body; they can be screwed to the body of the structure. My case will be the box from the computer's power supply.
I solder the components.
My transformer is about 25 volts, the tap is 5 volts. Transformer T60-10. I screwed it into the body, I'll take it off later and paint the body.
The diode bridge was assembled using domestic KD202A diodes. I found small radiators.
Capacitor for rectifier 2200 uF.
I install and solder the diodes.
Connected the network connector. I soldered wires to the amplifier board.
To power the fan and LED indication, installed a separate diode bridge. The bridge is Soviet, with a current of about 1 ampere. With reserve. Fan current and LED do not exceed 200 mA. Light-emitting diode I feed it through a 100 Ohm resistor. I soldered the filter capacitor, whatever it was, it doesn’t matter. There is no need to install a capacitor.
Unsoldered the network button.
I installed a board with a UMZCH chip. I screwed it to the bottom of the case with self-tapping screws. This way the chip will be cooled better. The fan also pulls air slightly. There are slots on top of the body through which air is drawn in. The blue wires go to the input connector. There's nothing military here.
Painted the body black. I duplicated the front panel with a metal plate. The plate was painted red. I thought it was more interesting this way. He riveted her.
Result
Turn it on and check. Light-emitting diode from an old MFP. Network button from an old computer power supply.
This is how the UMZCH turned out. The amplifier has significantly enlivened my speakers, even if you throw a disco. Before this I had a 2*3 watt amplifier. The amplifier was installed near the computer. All components were obtained free of charge from old equipment.
