Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Group Buys Members group buys

Group buy: TPA3251_TPA3255 Amplifier board and ADAU1701 DSP Pre-Amp board
Group buy: TPA3251_TPA3255 Amplifier board and ADAU1701 DSP Pre-Amp board
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 15th March 2019, 07:26 PM   #231
Lo_Tse is offline Lo_Tse  Canada
diyAudio Member
 
Join Date: Dec 2006
Quote:
Originally Posted by mixMZ View Post
when aprox do you plan to do next group buy?
Yup, I would be interested to get some boards too. I was out of the country for a few weeks in Feb and forgot to place the order before leaving
  Reply With Quote
Old 15th March 2019, 11:13 PM   #232
jimk04 is offline jimk04  United Kingdom
diyAudio Member
 
Join Date: Jul 2018
Location: North Notts
Dsp received in the UK thanks

Can we get a more detailed instruction or schematic on using the board please.
  Reply With Quote
Old 16th March 2019, 07:47 AM   #233
FogAudio is offline FogAudio
diyAudio Member
 
Join Date: May 2012
Does anyone have an old manual or have prior experience on how to wire up the Amp modules?

Did I read it correctly that J2 is used to switch between single-ended(unbalanced RCA) and differential (balanced XLR) inputs? That appears to be the case based on the Figure 1 labeling but there is not section in the current manual on J2. How are others planning to do this? I would like to build an amp that supports both RCA and XLR so it sounds like I am going to need to get SPDT ON-ON switches for each of my channels to run out to the back of the chassis.

I am also curious about the extra pin outs on the 3E Audio board: GND, CLIP_OTW, Fault, and Reset. Are the Clip/OTW and Fault pins typically used to run extra LED warning lights? Also, what is the maximum Vcc that can be applied to a pull-up resistor on those lines? Would it be ok to use the 12V auxiliary voltage? And what is the maximum current going into the open drain? What is the GND pin for?

The manual says that it supports an "Additional Power on/off reset for Pop noise suppression". How can I take advantage of this? Would an additional delay circuit need be tied to ground (active low) and then be opened (hi-z) to allow the amp to turn on?

Finally, I am putting three discrete 480Watt amps in one chassis. Should I consider adding a softstart circuit in front of the 3 3EAudio SMPS? Or do SMPSes typically not need a soft start because they don't employ large capacitors?
  Reply With Quote
Old 16th March 2019, 11:41 AM   #234
Audio Mo is offline Audio Mo
diyAudio Member
 
Join Date: Jan 2019
Quote:
Originally Posted by 3eaudio View Post
@All

Sorry for late,here comes all DHL tracking number.
all shipment had been done,most of you had already got them.

@Chile,@Russia DHL can't support shipment
there is some strict rule on local custom,so will return payment soon.

Attachment 742732
3eaudio

Just wondering why my boards are being shipped by Aramex and not DHL? Package been sitting in HK for a week now.
  Reply With Quote
Old 17th March 2019, 10:55 AM   #235
Bulibasha is offline Bulibasha  Romania
diyAudio Member
 
Join Date: Feb 2019
Location: Bucharest
Hello,
Managed to sort the noisy 12v amp supply for the DSP, thanks to @FogAudio earlier post, made me curious about testing the pins in the SE -> Diff configuration at the input and BAM! it works, no more noise from the BT module! So now working in balaced (XLR-like) config. Clean sound! Nice sound!
Managed to config the dsp to output to DAC0, DAC1 the full sound but no bass and treble adjustments yet, only volume works.
  Reply With Quote
Old 17th March 2019, 11:11 AM   #236
jimk04 is offline jimk04  United Kingdom
diyAudio Member
 
Join Date: Jul 2018
Location: North Notts
How do we connect and see the settings in the adau1701.

Have connected all up and opened Sigmastudio but I can't 'see' the board
  Reply With Quote
Old 17th March 2019, 01:47 PM   #237
FancyMcJackson is offline FancyMcJackson  Germany
diyAudio Member
 
Join Date: Feb 2019
Quote:
Originally Posted by jimk04 View Post
How do we connect and see the settings in the adau1701.

Have connected all up and opened Sigmastudio but I can't 'see' the board
Try "link compile download" button for your edited scheme, and have a look at the right bottom notifier which should say "active: downloaded" when things go right(temporarily flashed the scheme to device). To get to that point you have to install USBi drivers and do stuff, according to how-to on manual @3e-website(where you got the project files from, i guess thats what youve been missing.). If that's all ready and set u have to write project to EPROM when youre done via sigmastudio/hardware config, right-click on the ADAU1701board to apply permanently.
  Reply With Quote
Old 17th March 2019, 02:58 PM   #238
sphykik is offline sphykik  United States
diyAudio Member
 
Join Date: Aug 2014
Location: NC
Just got the TPA3251 (EAUMT-0140-2-A) hooked up today - single-ended mode using a 24v Meanwell power supply. It sounds great! Noticeably better than the Ebay TPA3116 I was using before. The new board has no noise to speak of.



Looking forward to implementing a better power supply and getting it all into a nice chassis.
  Reply With Quote
Old 17th March 2019, 03:46 PM   #239
Ytheleus is offline Ytheleus  United Kingdom
diyAudio Member
 
Join Date: May 2018
Quote:
Originally Posted by FogAudio View Post
I am also curious about the extra pin outs on the 3E Audio board: GND, CLIP_OTW, Fault, and Reset. Are the Clip/OTW and Fault pins typically used to run extra LED warning lights?

The manual says that it supports an "Additional Power on/off reset for Pop noise suppression". How can I take advantage of this? Would an additional delay circuit need be tied to ground (active low) and then be opened (hi-z) to allow the amp to turn on?
Clip OTW, FAULT and RESET are directly from pins on the 325x chip (I believe) and intended to be used with LEDs. The TI 325x datasheets will give you the full pin specifications. You can also find example sub-circuit schematics for clip and fault lines in the TI datasheet for their 325x EVM boards.

The reset pin can be GNDed, I did it via a switch and a pull down resistor of 1k I think, copying the example on the EVM schematic. I didn't bother with the error lights personally.

So the GNDed state of the reset line means the amp is powered on but silent. So with just a switch to GND via pulldown resistor, for example, you would engage reset before turning power on and off to eliminate switching transients etc. You could also use this in combination with a delayed power-on relay with the NC (normally closed) contact connecting the reset line to GND.

Certainly a reset/mute switch is easy to do and worth having even if you don't get any more elaborate.
  Reply With Quote
Old 17th March 2019, 04:46 PM   #240
Audio Mo is offline Audio Mo
diyAudio Member
 
Join Date: Jan 2019
Quote:
Originally Posted by Bulibasha View Post
Hello,
Managed to sort the noisy 12v amp supply for the DSP, thanks to @FogAudio earlier post, made me curious about testing the pins in the SE -> Diff configuration at the input and BAM! it works, no more noise from the BT module! So now working in balaced (XLR-like) config. Clean sound! Nice sound!
Managed to config the dsp to output to DAC0, DAC1 the full sound but no bass and treble adjustments yet, only volume works.
Thanks can you please be a little more specific what exactly did you do? Sorry Iím new to this
  Reply With Quote

Reply


Group buy: TPA3251_TPA3255 Amplifier board and ADAU1701 DSP Pre-Amp boardHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
SURE ADAU1701 DSP without input board: work? angelodj Digital Line Level 4 Today 03:47 PM
Sure DSP ADAU1701 board with amplifier JAB3-50 sorokin Digital Line Level 27 7th September 2018 10:52 PM
High quality PCB board for amplifier power supply - group buy supernet Group Buys 43 12th October 2015 07:22 PM
FS: Analogue Devices ADAU1701 DSP Board truecolour Swap Meet 2 5th February 2013 12:02 PM
LYNX Power Amplifier Board Group Buy fungustchan Group Buys 5 7th March 2006 09:49 PM


New To Site? Need Help?

All times are GMT. The time now is 04:43 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki