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Old 2nd June 2012, 11:19 PM   #91
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Quote:
Originally Posted by jean-paul View Post
You can use a 50V shunt supply with russian teflon caps if you like but don't be surprised if your DAC will stay eternally silent

Since someone connected it straight to a transformer I just know I have to be repeating that it needs 5V DC ... let alone that questions will arise if it can be used with LiPo batteries (that are 3.7V).....
You mean a black background, right?
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Old 2nd June 2012, 11:25 PM   #92
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Seriously, since building this DAC I understand what is meant with a "black background" but with music in this case.

BTW did I mention the DAC needs a 5V DC 250 mA to 1A power supply ???
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Last edited by jean-paul; 2nd June 2012 at 11:34 PM.
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Old 2nd June 2012, 11:57 PM   #93
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I am very much looking forward to enjoying the long hours you guys have spent working this out. I amsure itwill be well worth the wait. Cheers for the effort!
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Old 4th June 2012, 03:30 PM   #94
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All -

Here is the final list of members in the Group Buy. Please take a moment to review the sheet and let me know if you find any errors.

BOM has been added to the first post of this thread.

The board has been sent for manufacturing and ES9023 ordered. Lead time for manufacturing is 11 business days + 2 days for shipping.

In the next few days I will send and email to all participating members with the shipping address.

Thanks
Subbu
Attached Files
File Type: pdf ES9023 DAC PCB Group Buy - Final.pdf (44.1 KB, 77 views)

Last edited by unixdeveloper; 4th June 2012 at 03:57 PM.
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Old 4th June 2012, 03:47 PM   #95
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''You will need a metal casing, not wood not plastic but metal be it aluminium or steel, copper''

Paul mine work great in cheap plastic box.
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Old 4th June 2012, 05:03 PM   #96
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It will work even better in a metal enclosure. And if it is not your DAC that works better it will be other electronic devices in its vicinity that will. Basic principles are eh ... basic principles. Electronic devices with high frequencies should be shielded and a bonus of shielding is that RF from outside can not get in the DAC too. You might be lucky when your petrol car runs on Diesel but it will run better on petrol.

Ah I almost forgot: the DAC needs a 5V DC 250 mA to 1A power supply
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Last edited by jean-paul; 4th June 2012 at 05:15 PM.
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Old 5th June 2012, 12:21 AM   #97
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Default HOORAY!

Thank you, Subbu and Jean-Paul for posting the much-anticipated bill of materials. I immediately dove in, and populated a new project at Mouser with the materials.

Now, I have a small question/favor to ask of our gracious hosts, or any other builder who is more knowledgeable about electronics than me (which is most of you).

I like to buy from Mouser over DigiKey, but three items are not available from Mouser. I selected what I think are the most similar items. I was hoping someone could take a look at the substitutions I've selected and tell me it they're a good choice. I'm sure I'm not the only one with this question, just the first to ask.

R14, R15 (Jumpers)
Digi-Key: RES 0.0 OHM 1/8W SMD 0805 - MCU08050Z0000ZP500
My substitute: CRCW08050000Z0EA Vishay/Dale Thick Film Resistors - SMD

U3 (3.6V low dropout regulator)
Digi-Key: MIC5205-3.6YM5 TR Micrel Inc | 576-1260-1-ND | DigiKey
My substitute: LP2985IM5-3.6/NOPB National Semiconductor (TI) Low Dropout (LDO) Regulators

U4, U5, U6 (3.3V low dropout regulator)
Digi-Key: MIC5205-3.3YM5 TR Micrel Inc | 576-1259-1-ND | DigiKey
My substitute: LP3990MF-3.3/NOPB National Semiconductor (TI) Low Dropout (LDO) Regulators

Also, Mouser has a feature which lets people with accounts share projects. If anyone would like me to share my project with them, send me a PM with the name and e-mail address you have on file with Mouser. It could save some time populating your project or shopping cart.

-Byron
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Old 5th June 2012, 02:18 AM   #98
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Byron,

Sure you can use the substitutes mentioned above.

For R14, R15 you can just jumper them with solder. We added that resistor if some one wanted to experiment with different values.

The component values will differ for the regulator section if you go with LP2985 series. I will make an update to the BOM with appropriate component values for the different regulators.

Regards,
Subbu
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Old 5th June 2012, 04:55 AM   #99
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Quote:
Originally Posted by unixdeveloper View Post
All -

Here is the final list of members in the Group Buy. Please take a moment to review the sheet and let me know if you find any errors.

BOM has been added to the first post of this thread.

The board has been sent for manufacturing and ES9023 ordered. Lead time for manufacturing is 11 business days + 2 days for shipping.

In the next few days I will send and email to all participating members with the shipping address.

Thanks
Subbu
Hi Unixdeveloper,

Based on your list, it shows that I haven't sent you my shipping address. As far as I know, I already emailed you this information last June 1st. If you did not received it, then let me know so I can email it to you again.

Thanks,
Fred
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Old 5th June 2012, 05:40 AM   #100
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Quote:
Originally Posted by ByronInLawrence View Post
Thank you, Subbu and Jean-Paul for posting the much-anticipated bill of materials. I immediately dove in, and populated a new project at Mouser with the materials.

Now, I have a small question/favor to ask of our gracious hosts, or any other builder who is more knowledgeable about electronics than me (which is most of you).

I like to buy from Mouser over DigiKey, but three items are not available from Mouser. I selected what I think are the most similar items. I was hoping someone could take a look at the substitutions I've selected and tell me it they're a good choice. I'm sure I'm not the only one with this question, just the first to ask.

R14, R15 (Jumpers)
Digi-Key: RES 0.0 OHM 1/8W SMD 0805 - MCU08050Z0000ZP500
My substitute: CRCW08050000Z0EA Vishay/Dale Thick Film Resistors - SMD

U3 (3.6V low dropout regulator)
Digi-Key: MIC5205-3.6YM5 TR Micrel Inc | 576-1260-1-ND | DigiKey
My substitute: LP2985IM5-3.6/NOPB National Semiconductor (TI) Low Dropout (LDO) Regulators

U4, U5, U6 (3.3V low dropout regulator)
Digi-Key: MIC5205-3.3YM5 TR Micrel Inc | 576-1259-1-ND | DigiKey
My substitute: LP3990MF-3.3/NOPB National Semiconductor (TI) Low Dropout (LDO) Regulators

Also, Mouser has a feature which lets people with accounts share projects. If anyone would like me to share my project with them, send me a PM with the name and e-mail address you have on file with Mouser. It could save some time populating your project or shopping cart.

-Byron
Parts were chosen on their specs notably the regs. Using the parts in the BOM will save us from a lot pages solving possible issues. I think that is the reason BOMs are made.

Be glad you have Digikey over there and just order the parts there. If there is a reg with similar qualities it would be ADP151 but there does not exist a 3.6V version of that one. I used ADP151 on an all 3.3V version and results are very good. One needs to omit the 470 pF bypass caps. The ES9023 performs better on 3.6V.

This is my last reply on the typical questions "can I use this for that ?". I don't know if this is a cultural thing but in any case I get pretty tired of PM with questions like: " can I use square wheels instead of round wheels" and some days after that" my car drives fine with square wheels". I certainly do not want to be a annoying type of guy but we provide a design, a PCB and a chip + BOM + schematic. Now it is up to you to find the subscribed parts and populate the PCB. It can not be asked from us to answer every question on substitutes by people who also expect us to know the outcome of using the substitutes too !
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Last edited by jean-paul; 5th June 2012 at 05:52 AM.
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