Hi gays,I have designed two LM4780 pcb projects.One is standard two channel stereo amps,one is in parallel.The boards size is 127mm x 72.5mm,double-sided pcb,single chip.
the prices of small batchs is $20 USD/1PCB,30 pieces boards.If more, prices can also be reduced.
this is parallel layout projects,the standard stereo projects with the size of the parallel similar,same boards.you can use it make a stereo amplifier.
anyone interested?
this is my WIKI page.
-digi
the prices of small batchs is $20 USD/1PCB,30 pieces boards.If more, prices can also be reduced.
this is parallel layout projects,the standard stereo projects with the size of the parallel similar,same boards.you can use it make a stereo amplifier.
anyone interested?
this is my WIKI page.
-digi
for li_gangyi,
shipping to Singapore,no problems 🙂 Do you like the standard or parallel? I can make to order 0.1% resistors for the parallel boards use.Who has better suggestion?
shipping to Singapore,no problems 🙂 Do you like the standard or parallel? I can make to order 0.1% resistors for the parallel boards use.Who has better suggestion?
the fallowing link offer a lm3886 pcb at a price of US 5
http://www.my3c.net/product/detail.asp?ky=&pid=501&sgid=98&gid=7&gid2=&Sort=&Price=
http://www.my3c.net/product/detail.asp?ky=&pid=501&sgid=98&gid=7&gid2=&Sort=&Price=
hi li_gangyi
are you able to get hold of the LM4780s in Singapore?
do let me know where i can get them.
digi01, for $20/pcb, does it come with any components?
are you able to get hold of the LM4780s in Singapore?
do let me know where i can get them.
digi01, for $20/pcb, does it come with any components?
the boards including Input-output interface socket, and the regular screws.
NS 4780 price is $3.25 Qty 1K+,straight from national.I find some distributors of beijing china:
http://www.national.com/contacts/Details/0,1596,China,00.html
the price is good🙂
I like discussing more technological details even more, making this project more perfect. I have designed a 4780 of bridge mode again.
-digi
Looonnnggg tracks
Digi,
All of the paths in your layout are kinda long and so it'll be interesting to see how well this works. I'm worried about mains buzz (ground loops) and poor response due to inductances. Also, what are the component values and types?
Is the board really 3 x 5 inches??? Why so big??
What are the goals of this project?
-Robert
Digi,
All of the paths in your layout are kinda long and so it'll be interesting to see how well this works. I'm worried about mains buzz (ground loops) and poor response due to inductances. Also, what are the component values and types?
Is the board really 3 x 5 inches??? Why so big??
What are the goals of this project?
-Robert
🙂
I use top-down layout technology,and star type ground wire(no ground loops).it's can effective driving away buzz.The shortcoming of this technology is a long track, there are boards to be kept and offer some space for the stars ground
but it have really good performance and looks beautiful.
-digi
I use top-down layout technology,and star type ground wire(no ground loops).it's can effective driving away buzz.The shortcoming of this technology is a long track, there are boards to be kept and offer some space for the stars ground
but it have really good performance and looks beautiful.-digi
I am not clear. . . But I want to make into the real thing, I like pcb layout and design, it is one art in my view.
Hope that there are more responses.
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