Hi Vasi, Thanks for your feedback. Can you point me to these traces that could be repositioned ? I'm planning to manufacture it with Seeedstudio. Minimum requirements are 6mil space and 6mil width. I used 10mil for traces, sometimes 16mil for power traces.
Cheers, Seb 2011/2/5 funlw65(Vasi) <[email protected]> > Very nice looking board, I like it. Still, hard to made. Some traces > can be manually repositioned to have a little more space between them. > If is about 8mills traces-space then better to have them in a less > number - a reduced number of fabrication errors ... > Anyway, I like it (good to have two rows of connectors - can be > combined with male-female ones). > > Vasi > > On Feb 4, 11:59 am, Sebastien Lelong <[email protected]> > wrote: > > Hi guys, > > > > So...I'm back, after several tries. > > > > It was possible to keep most features, specifically providing 2 voltages, > 5V > > and 3.3V. This was quite a mess though, mostly Xbee requires 3.3V, and > > possibly voltage shifter on inputs (datasheet says it's not 5V tolerant, > but > > some report it is in reality). So I removed 5V regulation, and kept only > > 3.3V, making this board more 3.3V devices friendly. If Xbee isn't wanted, > > then one would just put an AMS1117-5V instead of 3.3V version. > > > > I worked again on power supply inputs. There can be 4 sources: USB (5V > > regulated to 3.3V), external (5-9V regulated to 3.3V), serial (no > regulation > > so must output 3.3V, quite rare), and battery (direct, no regulation). I > put > > a fuse after the regulation part. > > > > Since I had some room left, I added a microSD slot, though I still wonder > > how I'll solder it... :) It's on the bottom side. If replacing 3.3V > > regulator with a 5V one, again SD-card won't work. > > > > I doubled shield/breadboard connectors to allow breadboard + shields at > the > > same time. User could also solder some wires to plug the board to > external > > daughter, using external connectors/holes. Shields can also be on top or > > bottom, both, etc... > > > > I may also add another pin header which would include supplied voltage, > > making it available to shields/breadboard (voltage coming from USB, > > external, ...). > > > > Anyway here's the result, see attached files: schematic, PCB, PCB top, > PCB > > bottom (some comments are wrong, sorry). > > > > Feedback appreciated. Highly ! > > > > Cheers, > > Seb > > > > 2011/1/30 vasile surducan <[email protected]> > > > > > > > > > > > > > On Sat, Jan 29, 2011 at 10:49 AM, funlw65(Vasi) <[email protected]> > wrote: > > > > >> I think you will need to design two boards. One supporting USB uCs and > > >> second for serial uCs. Keep 1206 smd components, otherwise you must > > >> provide the board assembled. And this is because of 5x5mm limit. > > > > >> Try > > >> to see how many features you can put on a single type of board. > > > > > all you need... > > > > >> Vasile > > > > >> On Jan 29, 6:03 am, Sebastien Lelong <[email protected]> > > >> wrote: > > >> > Hi guys, > > > > >> > Here's my last version, including a 500mA fuse (not resettable, but > I > > >> only > > >> > have this one in my eagle lib), a rectifier diode for reverse > polarity > > >> > protection, onboard LED moved to RC2 (CCP1 pin). Some remaining > > >> "doubts": > > > > >> > - which package would I need for the diode: DO-214AA, DO-214-AB or > > >> > DO-214AC ? > > > > >> > - I still have doubts about the power supply part. Initially, I > wanted > > >> to > > >> > have power through USB or a battery. The board should handle 3.3V > and > > >> 5V, as > > >> > an option. When using a battery, say 2 x 1.5V AAA cells, I'd need to > > >> bypass > > >> > all regulation (maybe even a pump like this: > > >>http://www.sparkfun.com/products/9216). Using a rectifier diode will > also > > >> > drop the voltage down and may not be compatible. But I could also > use a > > >> 9V > > >> > battery, and thus need 5V and/or 3.3V regulators... and what if 3.3V > is > > >> > bypassed, but not the 5V regulator ? Xbee board will be powered with > 5V, > > >> > instead of 3.3V!!! You guessed it, I want many things and I'm not > sure > > >> which > > >> > is most important at this phase. Any input, advices ? I think when > I'll > > >> > start to create the PCB choices will be easier to make as I discard > > >> options > > >> > to gain room :) > > > > >> > - I added pin headers, 2 x 14 pins, I may add another one > dedicated to > > >> > power pins (like in Medium) if I get enough room (I doubt about it) > > > > >> > In order to save some precious room, I'm thinking of (high priority > to > > >> low): > > > > >> > - removing Reset-via-RTS option and make it always available > (2-way > > >> jumper > > >> > saved) > > >> > - remove two I²C jumpers, always make the board acting as a > master, > > >> and if > > >> > not wanted, just don't solder the resistors > > >> > - remove CTS jumper option (not used often ?) > > >> > - remove power from serial module option, focusing on USB or > battery > > >> > - keep only one regulator, adding an optional resistor to match > > >> required > > >> > 3.3V for Xbee when using 5V reg only. > > >> > - move to 0603 smd components..... > > > > >> > Any feedback highly appreciated! > > > > >> > TIA > > >> > Cheers, > > >> > Seb > > > > >> > 2011/1/25 mattschinkel <[email protected]> > > > > >> > > > Maybe I should just use two different voltage regulator, one > > >> AMS1117/5V > > >> > > and > > >> > > > AMS1117/3V3. Having only one component would have helped while > > >> sourcing > > >> > > > them. > > > > >> > > On one prototype board I bought, there is only a AMS1117/3V3. They > > >> > > assume you want to input > 5v and get 3v output. If you want > another > > >> > > voltage you can put a jumper (just solder) to connect the > input/output > > >> > > of the regulator so your voltage is whatever the input is. > > > > >> > > Matt. > > > > >> > > -- > > >> > > You received this message because you are subscribed to the Google > > >> Groups > > >> > > "jallib" group. > > >> > > To post to this group, send email to [email protected]. > > >> > > To unsubscribe from this group, send email to > > >> > > [email protected]<jallib%[email protected]> > <jallib%[email protected]<jallib%[email protected]> > > > > >> <jallib%[email protected]<jallib%[email protected]> > <jallib%[email protected]<jallib%[email protected]> > > > > > > >> > > . > > >> > > For more options, visit this group at > > >> > >http://groups.google.com/group/jallib?hl=en. > > > > >> > jaluino_v03_bee_schematic.png > > >> > 62KViewDownload > > > > >> -- > > >> You received this message because you are subscribed to the Google > Groups > > >> "jallib" group. > > >> To post to this group, send email to [email protected]. > > >> To unsubscribe from this group, send email to > > >> [email protected]<jallib%[email protected]> > <jallib%[email protected]<jallib%[email protected]> > > > > >> . > > >> For more options, visit this group at > > >>http://groups.google.com/group/jallib?hl=en. > > > > > -- > > > You received this message because you are subscribed to the Google > Groups > > > "jallib" group. > > > To post to this group, send email to [email protected]. > > > To unsubscribe from this group, send email to > > > [email protected]<jallib%[email protected]> > <jallib%[email protected]<jallib%[email protected]> > > > > > . > > > For more options, visit this group at > > >http://groups.google.com/group/jallib?hl=en. > > > > -- > > Sébastien Lelonghttp://www.sirloon.nethttp://sirbot.org > > > > jaluino_v04_bee_schematic.png > > 75KViewDownload > > > > jaluino_v04_bee_pcb.png > > 43KViewDownload > > > > jaluino_v04_bee_pcb_top.png > > 33KViewDownload > > > > jaluino_v04_bee_pcb_bottom.png > > 24KViewDownload > > -- > You received this message because you are subscribed to the Google Groups > "jallib" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<jallib%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/jallib?hl=en. > > -- Sébastien Lelong http://www.sirloon.net http://sirbot.org -- You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
