On Sun, Feb 12, 2017 at 2:30 PM, Internet <internet@devpi.de> wrote:
First look at PCB3 is finished, it is of course possible I am missing something. Anyways, following caught my eyes:
- the usb otg charger ic has two capacitors between regn and ground, total value: 11.5uF, datasheet says 1uF. probably no issue though
- 10k thermistor for the otg charger is connected to voltage divider and through another thermistor to bat-v (fuel guage), datasheet says it should be connected to ground (i am not to sure about the guage though, reference application is pretty chaotic and complex)
- status leds should be connected to sys-v (nothing to do if dvcc = sys-v)
- EOMA68-5V0 is not connected to anything, this results in an unpowered card on pcb1 (which is bad); should probably be connected to vcc-5v0)
- level shifter is completely unnecessary because lcd-vcc = vrefttl = 3v3; connect 10k pullup resistors to vrefttl and add pullup for chg_irq to vrefttl
TI bat IC is 1.8v.. wasn't happy with that.
- because eoma68-i2c is not used on this pcb remove pullups
_great_. encourages me to take a look and check.
I hope this helps and if I misunderstood something, please let me know. The fuel guage circuit is more complex than expected, I let you know if there is an issue.
Do you want me to put all this on rhombus-tech.net? If so, could you give me some instructions where and how to put it?
http://rhombus-tech.net/community_ideas/laptop_15in/pcb2/ then just work it out, put whatever you feel is appropriate and i'll review it and move / adjust if necessary.
Additionally, to edit the pages I need some kind of account creation password …
ah! sorry, i added that recently after there were attacks on the page -- it's "passwordreqd"
Julius Lehmann
On 11.02.2017 15:00, Luke Kenneth Casson Leighton wrote:
On Sat, Feb 11, 2017 at 1:33 PM, Internet <internet@devpi.de> wrote:
You are absolutely right. Putting comments separately is the best thing to do. I just found the edit button on rhombus-tech.net ;), this should definitely make things easier ...
yay, magic. also stops duplication and AOL-style me-too postings. if anyone remembers the AOL bbs...
l.
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