5.1 Channel audio preamplifier

Подписаться 776

Просмотров 13 тыс.

50% 1

This project introduces a digitally controlled 5.1 channel audio preamplifier system. This amplifier is specifically designed to increase the gain of the multi-channel PC sound cards.
This preamplifier consists of six TL074/TL072 preamplifier stages and PT2258 electronic volume control. The input stage of this preamplifier consists of six TL074/TL072 buffer stages. The PIC16F886 microcontroller manages the PT2258 electronic volume control IC. All the volume levels and menu options are displayed on HD44780, 16x2 character LCD screen.
This video shows all the steps of this project including, soldering, wiring, and menu system of the preamplifier.
Additional details and all the project files including, firmware, are available at jayakody2000lk.blogspot.com/20....
Content of the video:
00:00 - 5.1 channel preamplifier PCB
00:08 - Soldering PIC16F886 microcontroller
00:27 - Soldering TL074 and TL072 opamp ICs
01:55 - Soldering SMD resistors...
02:39 - Soldering SMD capacitors...
03:18 - Soldering BSS138 and BC817 transistors...
03:44 - Soldering SMD electrolytic capacitors
04:40 - Installing ground isolation jumpers
04:52 - Soldering through-hole type resistors
05:08 - Soldering through-hole type capacitors
05:15 - Soldering 50K trimpot
05:30 - Soldering the bridge rectifier
05:41 - Installing connectors and pin-headers
05:48 - Soldering filter capacitors
06:08 - Making the heatsink
07:02 - Soldering PT2258 IC/socket
07:20 - Preparing the ABS project box
09:28 - Attaching audio input cables to the PCB
09:37 - Attaching audio output cables to the PCB
10:30 - Connecting the 6V transformer to the PCB
10:45 - Mounting transformer and PCB into the box
10:58 - Installing 3.5mm stereo jack sockets
11:15 - Preparing EC11 rotary encoder...
11:29 - Preparing the push switch
11:37 - Connecting AC mains cable
12:14 - Mounting LCD, EC11 rotary encoder, and push switch
13:02 - Building and uploading the firmware
13:58 - Menu system and volume control modes
14:19 - Custom profile mode
15:29 - Reset to default (automatic) volume mode

Наука

Опубликовано:

29 июл 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 23

@saucebosspl 2 года назад

I'd like to drop some comments, I hope you won't mind. 1. I like how nice and tight the layout is. Love it. Also pretty good soldering. 2. TLXXX series opamps are terrible in audio, they have a lot of distortion in high frequency, making them sound harsh and tiring. If you wanna go cheap just use NE5532 (there is no quad package though). If you want to stay FET OPA1642. Also, it's a nice habit to use local decoupling capacitors near opamps (you can use 100nF between power rails). 3. Coupling capacitors should be bipolar electrolytic of much bigger capacitance, then you expect from simple filter calculation. Make them at least 10x, preferably 20x bigger then they need to be. Electrolytics will have significant distortion if there is a signal voltage on the capacitor (and input filter is a voltage divider, so bigger capacitance means lower internal resistance at given frequency, hence lower voltage on a capacitor). All of that and more you all can find in Douglas Self book called Small signal audio design. It's highly recommended! Cheers

@carlosmarmeli2587 11 месяцев назад

Que legal trabalho exelete belíssimo .

@kumargoldking5185 2 года назад

Wow!!!

@crsrinivasan2134 2 года назад

Super

@sandijati6583 4 месяца назад

how many amperes for the transformer? and I also replaced the TL opamp IC with a NE5532, is that possible?

@anasteshbasu5559 Год назад

I'd like buying this pcb how to get one??

@premkxk 2 года назад

This converts stereo into 5.1? How s the surround seperation though?

@DilshanJayakody 2 года назад

No, this needs 5.1 input. According to the PT2258 datasheet, it provides 90dB to 110dB channel separation.

@shamsunder2781 2 года назад

Sir what is the deference between this and remote kit

@DilshanJayakody 2 года назад

Sorry, I'm a bit confused, what did you mean by "remote kit"?

@anukuttan7728 2 года назад

Dolby dts support

@munivelk4424 2 года назад

Is it for Sale

@DilshanJayakody 2 года назад

This is a DIY project. You can order this PCB from www.pcbway.com/project/shareproject/5_1_channel_audio_preamplifier.html. All the build instructions and documentation are available at github.com/dilshan/6ch-af-preamplifier/wiki.

@kathirk773 2 года назад

Price

@DilshanJayakody 2 года назад

This is a DIY project.

@RamKumar-bb4dv 2 года назад

Super brother PDF file please

@DilshanJayakody 2 года назад

Please check github.com/dilshan/6ch-af-preamplifier/blob/main/design/6ch-preamp.pdf. The full documentation is available at github.com/dilshan/6ch-af-preamplifier/wiki

@RamKumar-bb4dv 2 года назад

Sir not coming PDF file please send me

@DilshanJayakody 2 года назад

@@RamKumar-bb4dv Please drop your email address. My email address is available at ru-vid.comabout

@RamKumar-bb4dv 2 года назад

@@DilshanJayakodysir your mail please

@mariappanayyavu8326 2 года назад

Price

@DilshanJayakody 2 года назад

This is a DIY project. You can order this PCB from www.pcbway.com/project/shareproject/5_1_channel_audio_preamplifier.html or download Gerber files from GitHub repository. All the build instructions and documentation are available at github.com/dilshan/6ch-af-preamplifier/wiki.