I forgot to say, this is amazing. Is there a wiki page up for this exciting project?
In London a few weeks back I saw a usb bike led lamp for 30 pounds! That's like $60 for a light! Jon On Fri, Nov 25, 2011 at 6:25 AM, Adam Wang <[email protected]> wrote: > Hi list and Ya Nuo, > > Since there's one project hosted by Deng Ya Nuo, I temporarily named it as > "Led Power Supply" here; If Ya Nuo thinks it's not good to fully express > it. You can just correct. :-) > > I cleaned up and copied some v1.0 files under: > http://downloads.qi-hardware.com/hardware/led_power_supply/v1.0/ > > A quick way to know what features/functions it have, see: > > http://downloads.qi-hardware.com/hardware/led_power_supply/v1.0/doc/manual__2X1M.jpg > > V1.0 demo pictures: > > http://downloads.qi-hardware.com/hardware/led_power_supply/v1.0/doc/001_demo_board.jpg > > V1.0 video: > > http://downloads.qi-hardware.com/hardware/led_power_supply/v1.0/doc/0012_demo_board.ogv > > From your txt boms, I tried to put all parts's datasheet link: > Haven't finished all, just needs some feedback from you; then couples days > I can fill them all up. ;-) > u403 main board bom is made: > > http://downloads.qi-hardware.com/hardware/led_power_supply/v1.0/bom/u403.ods > u401 is small so not filled them up yet. > > *some feedback for u403*: > > (Mechanical): > > 1. placing four mechanical holes at each corner on board is good to > assemble with case if need. > > 2. placing terminal blocks(Test Point)'s front hole can be parallel with > board edge to equip with future possible use case. > > e.g. LTP3, LPT5 > > (BOM): > > 1. > > From http://www.irf.com/ there's only two options about IRF350: > > > > https://ec.irf.com/v6/en/US/adirect/ir?cmd=catSearchFrame&domSendTo=byID&domProductQueryName=IRF350 > > one is AUIRF3504, Automotive Q101 40V Single N-Channel HEXFET Power > MOSFET in a TO-220AB Package, the other is IRF350, 400V Single N-Channel > Hi-Rel MOSFET in a TO-204AE package. But from your v1.0 mounted picture, > you indeed used TO-220 package not TO-204, so I am wondering what the real > p/n is you're using? or do you have that datasheet? > > If you bought them from ShenZheng incredible small electronic markets, > there may have a lot vendors that they don't provide datasheet that met to > your real part. > > > 1. > > U26, U27: what brand and p/n? > 2. > > U28, U29: TL431, what brand and p/n? > 3. > > C30 ~ C41: there's no 0805 package with 22pF @ 25V general purpose > capacitor in YAGEO and TDK categories, so I suggest to arise the rating > voltage to 50V then easily to source. > 4. > > C1 ~ C9: 16V or 25V? 1000UF or 680uF? What's the final voltage you > want? > 5. > > All VCs the pitch of lead has 10mm and 20mm width co-layouted. > > VC1, VC4, VC5: > > you reserved two differences of footprint for lead pitch, 10mm and > 20mm width. Actually this still have another option is 15mm pitch for lead. > > For example: > > Panasonic ECQU2A104KLA: > > http://datasheet.octopart.com/ECQU2A104ML-Panasonic-datasheet-24943.pdf > > this vendor also have: > > http://www.lianshuo.com/c-mpx.htm > > YC1's footprint now is about 12.5mm lead spacing/pitch, > > a option is Murata DE2E3KH222MA3B > > http://datasheet.octopart.com/DE2E3KH222MA3B-Murata-datasheet-87078.pdf > > but this type is 7.5mm only. If you've got real part number on hand from > you, let me know so that I can find substitudes. > > 1. > > I didn't find R94. Could you point me? > 2. > > 1206 1R should be only 40pcs not 60pcs > > > *feedback for u401* > > (layout): > > 1. placing four mechanical holes at each corner on board is good to > assemble with case if need. > > 2. R1 collides with VC2 capacitor. There's two footprints > co-layouted together, not sure which final type you'll use. > > 3. R23 collides with TR2 transformer's footprint, since there's no > datasheet of TR2 I can see, so if you have it then a review can be helpful. > > 4. The AC line traces may being large for real needs. > > 5. How do you think to connect u401with u403? Do you think they can > be hooked together in stack way? > > Since you're working on V2.0, if any info revised or updated above in > V2.0, no need to reply soon. Thanks. > > Hope one in list here can also bring some more idea or comments to you. > > Regards, > > adam > > > > > > > > > > > > > > > -- > Regards > Adam > > _______________________________________________ > Qi Hardware Discussion List > Mail to list (members only): [email protected] > Subscribe or Unsubscribe: > http://lists.en.qi-hardware.com/mailman/listinfo/discussion > -- Jon Phillips 王✳爻气 http://fabricatorz.com ✳ skype: kidproto ✳ irc: rejon +1.415.830.3884 (global) ✳ +86-187-1003-9974 (beijing)
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