Hello everyone, the sentences in the article may not read smoothly because my English level is not high and it was translated using software. However, we have common interests and hobbies,, we love music, DIY, and life.
A month ago, I planned to build a movie theater in my room so that I could watch movies happily.
So I bought a projector and a 150-inch curtain. But the sound effects are not exciting and happy enough. If I bought off the shelf amps and speakers the price would be out of my budget. Since I like electronic products, I have experience in DIY computers before. and was able to achieve my goals and expectations within a limited budget. Thus, the idea of DIY amplifier equipment and speakers was born.
First of all, I chose TDA7850 as the type of power amplifier chip, which supports 4 independent amplification channels. Two such chips can have 8 channels. Realize 7.1 panoramic sound system.
After learning more about the 7850 amplifier on the Internet, I ordered two PCB motherboards. As well as the required capacitors, inductors, connectors, power supplies, wires, speaker units, boxes, and tools needed for manufacturing.
Amplifier PCB and audio input filter mainboard, some capacitors and resistors, and wires.
The multimeter is used to detect whether the circuit, voltage and current are normal. My plan is to use a wooden box to place two power amplifier motherboards, as well as a prescaler and an audio input filter. Therefore, a 7 cm fan is prepared, and the temperature controller is used to control the starting fan to dissipate heat.
6.5-inch woofer,
3-inch midrange unit,
1-inch tweeter
The total power of the power supply is 350 watts. It can connect three devices at the same time, with rated voltage of 15V and maximum output current of 23.3A. I only use it to connect two devices, so the maximum current that each device can get is about 11.56A, which meets the power required by each power amplifier.
Some accessories arrived first, and some are still on the way.
Start soldering some components of the amplifier motherboard. Others will be installed after the courier arrives.
In order to facilitate the replacement of different capacitors later and have different sound effects, I prepared a base for the capacitors.
Only 20 attachments can be uploaded, so I will publish them at the next level later.
A month ago, I planned to build a movie theater in my room so that I could watch movies happily.
So I bought a projector and a 150-inch curtain. But the sound effects are not exciting and happy enough. If I bought off the shelf amps and speakers the price would be out of my budget. Since I like electronic products, I have experience in DIY computers before. and was able to achieve my goals and expectations within a limited budget. Thus, the idea of DIY amplifier equipment and speakers was born.
First of all, I chose TDA7850 as the type of power amplifier chip, which supports 4 independent amplification channels. Two such chips can have 8 channels. Realize 7.1 panoramic sound system.
After learning more about the 7850 amplifier on the Internet, I ordered two PCB motherboards. As well as the required capacitors, inductors, connectors, power supplies, wires, speaker units, boxes, and tools needed for manufacturing.
Amplifier PCB and audio input filter mainboard, some capacitors and resistors, and wires.
The multimeter is used to detect whether the circuit, voltage and current are normal. My plan is to use a wooden box to place two power amplifier motherboards, as well as a prescaler and an audio input filter. Therefore, a 7 cm fan is prepared, and the temperature controller is used to control the starting fan to dissipate heat.
6.5-inch woofer,
3-inch midrange unit,
1-inch tweeter
The total power of the power supply is 350 watts. It can connect three devices at the same time, with rated voltage of 15V and maximum output current of 23.3A. I only use it to connect two devices, so the maximum current that each device can get is about 11.56A, which meets the power required by each power amplifier.
Some accessories arrived first, and some are still on the way.
Start soldering some components of the amplifier motherboard. Others will be installed after the courier arrives.
In order to facilitate the replacement of different capacitors later and have different sound effects, I prepared a base for the capacitors.
Only 20 attachments can be uploaded, so I will publish them at the next level later.
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