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Old 8th January 2010, 04:56 PM   #1
dukep is offline dukep  United States
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Default Chip amp for Beginners, LM4766

I have designed a board for a more complete connection of Ipod to speakers.
It has the preamp, amp and ability to evolve. Please review the group buy thread; chipamp with potential.

I need some more interested persons to get quantity pricing.
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Old 9th January 2010, 02:24 PM   #2
rajudp is offline rajudp  India
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Default Lm4766

can you post the circuit and board picture
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Old 10th January 2010, 02:11 AM   #3
qusp is offline qusp  Australia
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a more complete connection of ipod to speakers than what? an LOD provides every connection needed for audio, this sounds reads like marketing spin, but i'll go check it out to see what you are on about

edit: went and checked it out, looks interesting enough and I might grab a bare board to build for a present, but its hardly ipod specific and without a dock for ipod it will not get the best out of the ipod. I can provide complete modern wiring pinout for devices up to the ipod touch 3G and iphone 3GS without accessory warning. I would include the option for an ipod dock if I were you rather than just 3.5mm input jack. the stock parts are interesting for entry level, but the choice of opamps (not chip amp part) could be better with very little extra cost IMO

Last edited by qusp; 10th January 2010 at 02:40 AM.
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Old 11th January 2010, 12:16 PM   #4
dukep is offline dukep  United States
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Yes, it is marketing spin... The intent is for the builder to choose his / her best source, and wire the board for that. So, on that point you are right.. it is not specific to the Ipod.

My design focus is to provide and better path to amplification of Ipod/ mp3/ cpu than some of the 'soon to be landfill' types. It is a good entry level integrated amp.

I have some interested in 1/4 in -or- xlr microphone inputs -or- phono. I'm personally interested in the phone stage, since my Thorens really wants to be heard again.

Thanks, please send pin-outs.. It would be good to have the source and pin out for the IPOD. I personally only have a simple mp3 and laptop computer with headphone out. I can still add it, nothing fixed in stone. The circuit boards and parts are on order.

What is the best op-amp? see 10 page discussion on another thread. The choices are infinite. I selected a good one well known, ne5532a (guaranteed low noise version). It should be matched well to the LM4766 in distortion and noise.

Certainly the creativity and knowledge of the builder must come into play. I'd say the board and lm chip perhaps best suits you.
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Old 12th January 2010, 02:29 PM   #5
troystg is offline troystg  United States
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To me this appears to be more of a "mini-system" along the NAD lines... Connect whatever in, and a pair of speakers and you are set. If you need more, grow the system. It can morph to a function as the heart really sophisticated system.

I have an order in for a "kit" and will comment on versatility and quality once it is built. Until then I can observe that it looks to be well designed and VERY handy. Already I see uses on my desk, the two kids rooms, the workshop bench.....
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Old 21st January 2010, 12:48 PM   #6
dukep is offline dukep  United States
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Default Board in...

1st board is under construction, amp works well

Please inquire under the group buy if intested in this chip amp board.
Attached Images
File Type: jpg stereo80 1st buildc.jpg (86.1 KB, 503 views)
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Old 21st January 2010, 01:15 PM   #7
dukep is offline dukep  United States
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Default this board has a preamp!

Builders may want the board for the preamps --the preamp section has 7 dual opamps for your consideration/ creativitiy.

the preamp can be configured for multiple functions, eq, crossovers etc.

I have made allowances for the use of variable regulators, 317/337, for lower noise and voltage control. It is a bit of cutting, add 4 resistors, but easy.
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File Type: bmp stereo 80 preamp.bmp (96.3 KB, 132 views)
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Old 24th January 2010, 11:00 AM   #8
dukep is offline dukep  United States
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Default Boards available

The boards are available for this preamp & chipamp
I've a-massed enough parts for 20+ kits, you'll need to add a case.

further info is at dukescreations.com
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Old 6th February 2010, 11:04 PM   #9
dukep is offline dukep  United States
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Default PCB's and Kits ready, are you?

Please review the buckets of info on the web site to determine if this is the proper DIY for your next build.

dukescreations.com
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Old 22nd February 2010, 11:19 PM   #10
dukep is offline dukep  United States
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Default Kits and boards here

Well,
I have 90+ circuit boards and chips still waiting for a home. Please review the web site if interested in 40w/ch with a clean preamp in a small compact unit.

Duke
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