New Digital Pre-Amp

jleaman · 15th May 2004, 09:27 PM

Well it has been about 3 weeks now and i have been talking to a member here on the forum Elkaid. We have been talking back and forth about this new Pre-Amp that uses the PIC18LF452 Chip. I have full details and schematics and ect info. here is the schematic if any one wants the full high resolution one please email me or PM me.

Edit: schematic removed for copyright reasons. Jean-Paul

Claus · 15th May 2004, 09:44 PM

More about this "Digital"preamp can be found here
Digi preamp .

It looks like a very fine and simple preamp with a lot of smart details. A far as I know it was first printed in Elektor.
But to call it a digital preamp. It is a analog preamp with a pic controlled volume control and switch.

Best regards

Claus

jleaman · 15th May 2004, 09:58 PM

I guess i should have said digital being the display is digital and the volume is digital : O) Sorry guy's..

ZERS · 16th May 2004, 11:16 AM

Do you plan to add an active cross-over that could be managed by the µC ?

Claus · 16th May 2004, 12:05 PM

Hi
you can easilly add more pga2311a's and then maybe have Behringer DCX2496 in front of them. That way you don't ruin the S/N ratio at low volume.

Best Regards

Claus

jleaman · 16th May 2004, 04:33 PM

I am but i don't know about any one else.. Im looking at some good balanced line converter's too..

Devil_H@ck · 16th May 2004, 04:49 PM

Quote:

Originally posted by JasonL
I am but i don't know about any one else.. Im looking at some good balanced line converter's too..

Take a look at the INA134 & INA137 from Texas Instruments, they look very easy to use.

jleaman · 16th May 2004, 05:06 PM

i have them LOL.. samples man samples..

jean-paul · 16th May 2004, 05:22 PM

This preamp is in the current editions of Elektor ( Elektuur in dutch ) and I am pretty sure that they don't want this schematic published here. You can visit their website and see the partlist, download the PCB layout and download the software for free. So everything can be had for free except the schematic + article/ready made boards. BTW they sell the PCB's for this project. I checked and publishing the schematic or parts of the schematic in any way is forbidden without permission as it is their sole source of income together with advertisements in the magazine.

PCB layout:

http://elektuur.o4s.com/Elektuur/NL/...e/020046-1.zip

Software for the PIC:

http://elektuur.o4s.com/Elektuur/NL/.../020046-11.zip

If someone wants the schematic he/she can buy the magazine. In the dutch edition it is in the May and April edition. The project is called The Audio Link.

jleaman · 16th May 2004, 05:30 PM

Actually i'm just writing a email to them now stating that i'm going to build there pre-amp and have other put in idea's for further development and stuff..

15th May 2004, 09:27 PM	#1
jleaman Banned Join Date: Apr 2002	New Digital Pre-Amp Well it has been about 3 weeks now and i have been talking to a member here on the forum Elkaid. We have been talking back and forth about this new Pre-Amp that uses the PIC18LF452 Chip. I have full details and schematics and ect info. here is the schematic if any one wants the full high resolution one please email me or PM me. Edit: schematic removed for copyright reasons. Jean-Paul

16th May 2004, 05:22 PM	#9
jean-paul diyAudio Moderator Emeritus Join Date: Sep 2002 Location: The Netherlands	This preamp is in the current editions of Elektor ( Elektuur in dutch ) and I am pretty sure that they don't want this schematic published here. You can visit their website and see the partlist, download the PCB layout and download the software for free. So everything can be had for free except the schematic + article/ready made boards. BTW they sell the PCB's for this project. I checked and publishing the schematic or parts of the schematic in any way is forbidden without permission as it is their sole source of income together with advertisements in the magazine. PCB layout: http://elektuur.o4s.com/Elektuur/NL/...e/020046-1.zip Software for the PIC: http://elektuur.o4s.com/Elektuur/NL/.../020046-11.zip If someone wants the schematic he/she can buy the magazine. In the dutch edition it is in the May and April edition. The project is called The Audio Link. __________________ It's only audio

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15th May 2004, 09:44 PM	#2
Claus diyAudio Member Join Date: Feb 2001 Location: Denmark / Germany	More about this "Digital"preamp can be found here Digi preamp . It looks like a very fine and simple preamp with a lot of smart details. A far as I know it was first printed in Elektor. But to call it a digital preamp. It is a analog preamp with a pic controlled volume control and switch. Best regards Claus

15th May 2004, 09:58 PM	#3
jleaman Banned Join Date: Apr 2002	I guess i should have said digital being the display is digital and the volume is digital : O) Sorry guy's..

16th May 2004, 11:16 AM	#4
ZERS diyAudio Member Join Date: Jan 2004 Location: LYON	Do you plan to add an active cross-over that could be managed by the µC ?

16th May 2004, 12:05 PM	#5
Claus diyAudio Member Join Date: Feb 2001 Location: Denmark / Germany	Hi you can easilly add more pga2311a's and then maybe have Behringer DCX2496 in front of them. That way you don't ruin the S/N ratio at low volume. Best Regards Claus

16th May 2004, 04:33 PM	#6
jleaman Banned Join Date: Apr 2002	I am but i don't know about any one else.. Im looking at some good balanced line converter's too..

16th May 2004, 05:06 PM	#8
jleaman Banned Join Date: Apr 2002	i have them LOL.. samples man samples..

16th May 2004, 05:30 PM	#10
jleaman Banned Join Date: Apr 2002	Actually i'm just writing a email to them now stating that i'm going to build there pre-amp and have other put in idea's for further development and stuff..

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