My new LM4781 6-channel project

microJean · 3rd September 2004, 08:38 AM

I've just finished the board for my new 6-channel audio amplifier, with microcontroller. The amplifier is controlled via infra-red and some buttons and has a 4-line LCD.
I also used LM1973 - 3 channel digital controlled volume circuit.
Here are the schematics and pcb's layers.

http://www.microjean.go.ro/sch.gif - schematic
http://www.microjean.go.ro/top.gif - top layer
http://www.microjean.go.ro/bottom.gif - bottom layer
http://www.microjean.go.ro/silk.gif - silk-screen

maxw · 3rd September 2004, 01:29 PM

post pics when its built

SheldonD · 3rd September 2004, 02:41 PM

I get 403 forbiffen on all ypur pics and you do not accept email

maxw · 3rd September 2004, 03:06 PM

Quote:

Originally posted by SheldonD
I get 403 forbiffen on all ypur pics and you do not accept email

Try clicking the links to the pics then adding a space to the end of the URL and then pressing enter

SheldonD · 3rd September 2004, 04:42 PM

thank you, that works fine, i have not hit this
before is a hiddden character I guess

Alphas · 9th October 2004, 08:17 AM

wow

Please post the finished product as soon as possible!

PGPfan · 22nd October 2004, 08:03 AM

Newbie to the board, but just wanted to say that this is indeed a very impressive project. Any updates?

Thanks!

-PGPfan

microJean · 22nd October 2004, 06:43 PM

I've made a lot of changes. I'll post the updates soon...maybe monday.

It's stil in a project fase because I want to think a lot about it... rush is baaad!

There's a new processor, temperature sensor, PWM controlled fan, LCD, keyboard, infrared and now I'm working on the opto-mecanical volume control (almost like the mecanical ball-mouse technology).

roibm · 22nd October 2004, 07:19 PM

How do you plan build the boards?

microJean · 23rd October 2004, 08:05 AM

I'll send the gerber files to a PCB manufacturer in Bucarest

.
But as I said before, no rush. It's a single board witch will be the pattern for the case construction (all connectors for inputs, buttons and speakers are planted on board)

3rd September 2004, 08:38 AM	#1
microJean diyAudio Member Join Date: Dec 2003 Location: Romania	My new LM4781 6-channel project I've just finished the board for my new 6-channel audio amplifier, with microcontroller. The amplifier is controlled via infra-red and some buttons and has a 4-line LCD. I also used LM1973 - 3 channel digital controlled volume circuit. Here are the schematics and pcb's layers. http://www.microjean.go.ro/sch.gif - schematic http://www.microjean.go.ro/top.gif - top layer http://www.microjean.go.ro/bottom.gif - bottom layer http://www.microjean.go.ro/silk.gif - silk-screen

3rd September 2004, 02:41 PM	#3
SheldonD diyAudio Member Join Date: Feb 2004 Location: North of Toronto	MICROJEAN I get 403 forbiffen on all ypur pics and you do not accept email __________________ Sheldon D

3rd September 2004, 04:42 PM	#5
SheldonD diyAudio Member Join Date: Feb 2004 Location: North of Toronto	MAXW thank you, that works fine, i have not hit this before is a hiddden character I guess __________________ Sheldon D

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3rd September 2004, 01:29 PM	#2
maxw diyAudio Member Join Date: Jun 2004 Location: London	post pics when its built

9th October 2004, 08:17 AM	#6
Alphas diyAudio Member Join Date: Jan 2004 Location: AUDIO	wow Please post the finished product as soon as possible!

22nd October 2004, 08:03 AM	#7
PGPfan diyAudio Member Join Date: Oct 2004	Newbie to the board, but just wanted to say that this is indeed a very impressive project. Any updates? Thanks! -PGPfan

22nd October 2004, 06:43 PM	#8
microJean diyAudio Member Join Date: Dec 2003 Location: Romania	I've made a lot of changes. I'll post the updates soon...maybe monday. It's stil in a project fase because I want to think a lot about it... rush is baaad! There's a new processor, temperature sensor, PWM controlled fan, LCD, keyboard, infrared and now I'm working on the opto-mecanical volume control (almost like the mecanical ball-mouse technology).

22nd October 2004, 07:19 PM	#9
roibm Banned Join Date: Dec 2003 Location: Transylvania	How do you plan build the boards?

23rd October 2004, 08:05 AM	#10
microJean diyAudio Member Join Date: Dec 2003 Location: Romania	I'll send the gerber files to a PCB manufacturer in Bucarest . But as I said before, no rush. It's a single board witch will be the pattern for the case construction (all connectors for inputs, buttons and speakers are planted on board)

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