2014-01-17 00:05 interesting comment from some Imagination 'Technology PR' regarding open source drivers for PowerVR http://www.cnx-software.com/2014/01/10/a80-optimusboard-features-allwinner-octa-core-big-little-soc/#comment-147660 2014-01-17 00:20 wpwrak: was looking at y-box schematics http://downloads.qi-hardware.com/people/werner/anelok/tmp/ybox-draft-20140116.pdf .. can you tell me please why the CON2 GND is connected to VBUS from CON3 and VBUS from CON2 connected to GND of CON3 .... I thought it should be GND - GND and VBUS to VBUS ? sorry bit lost here :) 2014-01-17 00:26 urgh 2014-01-17 00:27 d- and d+ get swapped too 2014-01-17 00:27 the connector is pinned reverse or so 2014-01-17 00:28 seems that some idiot forgot to flip the thing 2014-01-17 00:28 nice find nick 2014-01-17 00:29 wpwrak: *whew* sorry I thought there is a reason behind the switching of those 2 as I'm still new in this kind of things so was not sure whether it's my understanding :) 2014-01-17 00:29 roh: thanks 2014-01-17 00:29 thats what review is all about! :) 2014-01-17 00:30 somebody learns something, and somebody doesnt fry his usb device ;) 2014-01-17 00:30 actually .. lemme check whether the schematics symbol is correct ... 2014-01-17 00:33 wpwrak: you are using this USB connector http://www.digikey.com/product-detail/en/ZX62-B-5PA%2811%29/H11634CT-ND/1993369 and I have this kind of connector http://www.ebay.com/itm/320986999116 that it looks the same in terms of pin connection am i correct ? .... and also when i was playing with my USB LED board I solder the 4 legs not to GND but yours is connected to GND...what is the benefits of connecting the 4 2014-01-17 00:33 leg to GND ? 2014-01-17 00:38 the shield shouldn't float. not sure if just connecting all the shields is ideal but it can't be entirely wrong either 2014-01-17 00:38 symbol looks right. so the routing is indeed wrong 2014-01-17 00:38 nicksydney: thanks a lot ! that saved me some future headache :) 2014-01-17 00:39 will fix it later. gotta run now. 2014-01-17 00:39 wpwrak: no worries....thanks for sharing the schematics it helped me also to learn a number of things of connecting USBs together :) 2014-01-17 00:42 wpwrak: for CC2543 how do you begin in determining what components to connect to which pin when you start designing this ? do you go through and read everything that is in the datasheet ? or there is something like a reference template that is provided by the chip vendor 2014-01-17 00:43 I was thinking if we want to start designing something with a new chip reading through datasheet for someone like me is going to be a nightmare as surely I won't be able to understand all the detail technical specs that is listed inside the datasheet so interested to know what are the normal steps that you take 2014-01-17 00:52 wpwrak: was googling for 2450BM15A0002 and found this http://www.ti.com/lit/an/swra297b/swra297b.pdf ... noticed on page 4 there is a diagram http://ctrlv.in/284141 .... was wondering if the function of L252 shown is the same as the Y-box R2 ? 2014-01-17 00:53 it's so cool..that the discrete components that TI normally used now sits nicely and pretty in 1 single 'small' chip http://ctrlv.in/284144 2014-01-17 01:07 wpwrak: another question...looking through CC2543 datasheet pg 21 under the 'Application Information' section pin 18 is connect to GND while y-box is to 3v3 ... and pin 23 and 24 connect to 3v3 with 220pF and 100nF while datasheet connect pin 23,24 and 29 straight to power (2-3.6v) ? 2014-01-17 01:07 sorry too many questions :) 2014-01-17 01:09 boy oh boy..CC2543 is not cheap eh...digikey selling them for over $6/piece :( 2014-01-17 01:20 wpwrak's battery holder porn http://downloads.qi-hardware.com/people/werner/anelok/tmp/bat-holders.jpg :) 2014-01-17 01:24 jekhor has quit [Ping timeout: 248 seconds] 2014-01-17 01:35 wej has quit [Ping timeout: 252 seconds] 2014-01-17 01:45 dos1 has quit [Read error: Operation timed out] 2014-01-17 02:05 FDCX_ has joined #qi-hardware 2014-01-17 02:07 pcercuei has quit [Quit: dodo] 2014-01-17 02:08 FDCX has quit [Ping timeout: 252 seconds] 2014-01-17 02:19 FDCX__ has joined #qi-hardware 2014-01-17 02:23 FDCX_ has quit [Ping timeout: 252 seconds] 2014-01-17 03:02 nicksydney has quit [Remote host closed the connection] 2014-01-17 03:03 nicksydney has joined #qi-hardware 2014-01-17 03:07 nicksydney has quit [Remote host closed the connection] 2014-01-17 03:08 nicksydney has joined #qi-hardware 2014-01-17 03:09 interesting concept http://www.indiegogo.com/projects/cloudphone-3g-revolutionize-how-you-care 2014-01-17 03:09 interesting to make this as open source project :) 2014-01-17 03:13 nicksydney has quit [Remote host closed the connection] 2014-01-17 03:14 nicksydney has joined #qi-hardware 2014-01-17 03:18 DocScrutinizer05: seems like Neo900 can be used for this kind of thing --> http://www.indiegogo.com/projects/cloudphone-3g-revolutionize-how-you-care 2014-01-17 03:18 DocScrutinizer05: just removed all the unnecessary parts that we don't need :) 2014-01-17 03:19 DocScrutinizer05: Neo900 has got Barometer/thermometer ... is the thermometer can be use to measure body temperature too ? 2014-01-17 03:42 nicksydney: (selecting cc2543 pins) well, first i have a look at what functions are in the chip. then i select the ones i need. e.g., UART in SPI mode for SPI and a timer output for the clock that goes to the KL25 2014-01-17 03:43 then there are often various pins one can select for one function. so i try to pick something that looks low on conflicts and where the order of signals on both ends matches 2014-01-17 03:43 this is just heuristics. sometimes i find that my choice wasn't all that great and i reassign them later on 2014-01-17 03:43 what you mean by "looks low on conflicts and where the order of signals on both ends matches" ? 2014-01-17 03:44 "low on conflicts" = not in an area where lots of things come together (if i have a choice) 2014-01-17 03:45 "order of signals" = if chip 1 needs to talk to chip 2 and chip 1 has the signals A B C D in this fixed order but i can configure different orders for chip 2, then i should try to find something close to A B C D as well 2014-01-17 03:45 else i have a lot of crossed signals 2014-01-17 03:46 the signals A B C D you are referring to is SPI et al ? 2014-01-17 03:47 (L252) yes, that's the matching/tuning circuit. their LC combination is a bit unusual. but i guess they know what they do :) 2014-01-17 03:49 the values in the tuning/matching circuit depend on lots of hard to calculate factors. sometimes you don't need anything. so it's all trial and error. for the prototype, i don't plan on making a lot of RF optimization experiments. but i include space for the components in the circuit, so that it can be tuned if needed. 2014-01-17 03:51 (pin 18) that looks like a bug in TI's schematics ;-) 2014-01-17 03:52 (other pins) note the fine print in the data sheet: "Power Supply Decoupling Capacitors are Not Shown" 2014-01-17 03:53 (pin 18)..how do you deduce it's a bug ? is it because the pin is labelled VDD so it should not be to GND ? 2014-01-17 03:54 in anelok/anelok, run dsv ccsch 2014-01-17 03:54 that's their reference circuit. that's the one i used as a basis for power. and it has pin 18 ad VDD, 2014-01-17 03:55 like the data sheet does almost everywhere. but yes, it's a not very nice bug in ti's documentation. 2014-01-17 03:56 (signals A B C D) yes. SPI has lots of them, and the order often has slight variations 2014-01-17 03:59 (dsv) no data sheet found for "ccsch" ? 2014-01-17 04:10 wpwrak: another balun for CC254x http://www.st.com/web/catalog/sense_power/FM139/CL1806/SC1508/PF258444?ecmp=pf258444_enews_stnews_jan2014 :) 2014-01-17 04:15 git pull; make dsv; dsv ccsch 2014-01-17 04:16 "Coated Flip-Chip on glas" argh ;-) 2014-01-17 04:18 no idea whatever that do to the chip :) 2014-01-17 05:29 qwebirc69464 has joined #qi-hardware 2014-01-17 05:29 qwebirc69464 is now known as rjeffries 2014-01-17 05:31 wpwrak cool small e-ink displays: http://www.the-digital-reader.com/2014/01/16/atmel-pervasive-displays-launch-new-diy-kit-w-e-ink-screens/ 2014-01-17 06:17 rjeffries: http://www.seeedstudio.com/depot/204-eink-display-shield-p-1374.html 2014-01-17 06:24 rjeffries has quit [Ping timeout: 272 seconds] 2014-01-17 07:24 very nice for debugging http://www.chipquik.com/store/probes.htm 2014-01-17 08:11 jekhor has joined #qi-hardware 2014-01-17 08:18 xiangfu has quit [Remote host closed the connection] 2014-01-17 08:37 eintopf has quit [Remote host closed the connection] 2014-01-17 08:41 wej has joined #qi-hardware 2014-01-17 08:48 nicksydney: (flip-chip) means it's damnably small ;-) 2014-01-17 08:50 nicksydney: cut ... but the prices are evil 2014-01-17 08:55 xiangfu has joined #qi-hardware 2014-01-17 09:57 lekernel has joined #qi-hardware 2014-01-17 10:37 #s/cut/cute/ # that was typed at resting caffeine levels ... 2014-01-17 10:51 yeah the price is evil ! 2014-01-17 10:51 but nevertheless the idea is really interesting..wish someone will make it more cheaper say like $10 / piece 2014-01-17 10:55 i guess there ought to be something on aliexpress ... ;-) 2014-01-17 11:18 lindi- has quit [Ping timeout: 260 seconds] 2014-01-17 11:26 lindi- has joined #qi-hardware 2014-01-17 11:26 lindi- has quit [Changing host] 2014-01-17 11:26 lindi- has joined #qi-hardware 2014-01-17 11:34 wpwrak: nah nothing there has looked around :) 2014-01-17 11:43 lindi- has quit [Quit: No Ping reply in 180 seconds.] 2014-01-17 11:44 lindi- has joined #qi-hardware 2014-01-17 11:46 nicksydney: no 2014-01-17 11:47 it probably is even useless to probe ambient temperature 2014-01-17 11:48 DocScrutinizer05: was thinking if we strip off all the unneeded features of Neo900 it can be used something like the cloudphone project...probably add some other stuff like heart-rate sensors, temp sensor :) 2014-01-17 11:48 oh well it was just a thought :) 2014-01-17 11:49 I don't like clouds 2014-01-17 11:53 let's not forget penis size. this information is essential for targeted marketing :) 2014-01-17 11:58 uwe_ has quit [Ping timeout: 272 seconds] 2014-01-17 11:59 jekhor has quit [Ping timeout: 245 seconds] 2014-01-17 12:00 uwe_ has joined #qi-hardware 2014-01-17 12:31 pcercuei has joined #qi-hardware 2014-01-17 13:02 wpwrak: found a site with lots of kicad library and footprint http://smisioto.no-ip.org/elettronica/kicad/kicad-en.htm 2014-01-17 13:19 wej has quit [Ping timeout: 252 seconds] 2014-01-17 13:21 wej has joined #qi-hardware 2014-01-17 13:36 ah, nice, with 3D drawings. i never have the patience for these. 2014-01-17 13:39 xiangfu_ has joined #qi-hardware 2014-01-17 13:39 xiangfu_ has quit [Client Quit] 2014-01-17 14:01 wej has quit [Ping timeout: 245 seconds] 2014-01-17 14:04 lekernel has quit [Read error: Operation timed out] 2014-01-17 14:07 wej has joined #qi-hardware 2014-01-17 14:18 lekernel has joined #qi-hardware 2014-01-17 14:37 nicksydney: that STM balun is growing on me. it seems to have very nice characteristics ... 2014-01-17 14:40 digi-key are getting sloppy, though: Description: "BALUN IPD 500OHM FLIPCHIP". Yeah, as if ;-) 2014-01-17 14:57 eintopf has joined #qi-hardware 2014-01-17 15:13 qwebirc97906 has joined #qi-hardware 2014-01-17 15:13 qwebirc97906 is now known as rjeffries 2014-01-17 15:17 nicksydney a more recent page at Seed: https://www.seeedstudio.com/depot/204-eink-display-shield-p-1374.html (price decrease of 50 pct) 2014-01-17 15:23 jekhor has joined #qi-hardware 2014-01-17 15:57 wej has quit [Ping timeout: 252 seconds] 2014-01-17 15:59 wej has joined #qi-hardware 2014-01-17 16:00 rjeffries has quit [Ping timeout: 272 seconds] 2014-01-17 16:04 wej has quit [Ping timeout: 245 seconds] 2014-01-17 16:05 wej has joined #qi-hardware 2014-01-17 16:30 paul_boddie has joined #qi-hardware 2014-01-17 16:31 rjeffries: Product discontinued. You want http://www.seeedstudio.com/depot/small-epaper-shield-p-1597.html?cPath=34_82 which looks like a remake of the Adafruit board. 2014-01-17 16:33 See also: http://en.qi-hardware.com/wiki/Ben_E-paper 2014-01-17 16:38 arielenter has joined #qi-hardware 2014-01-17 16:45 jekhor has quit [Ping timeout: 246 seconds] 2014-01-17 17:13 dos11 has joined #qi-hardware 2014-01-17 18:01 paul_boddie has quit [] 2014-01-17 18:09 lekernel has quit [Remote host closed the connection] 2014-01-17 18:10 jekhor has joined #qi-hardware 2014-01-17 18:10 lekernel has joined #qi-hardware 2014-01-17 18:13 pcercuei has quit [Quit: leaving] 2014-01-17 19:50 dos11 is now known as dos1 2014-01-17 20:29 rz2k has joined #qi-hardware 2014-01-17 20:32 rz2k has quit [Client Quit] 2014-01-17 20:33 http://www.dailymail.co.uk/news/article-2540955/Beijing-clouded-smog-way-sunrise-watch-giant-commercial-screens-Tiananmen-Square.html 2014-01-17 20:46 ;-)) 2014-01-17 20:46 i hope the screens are powered by some diesel generators :) 2014-01-17 20:51 wolfspraul has quit [Ping timeout: 245 seconds] 2014-01-17 20:53 wolfspraul has joined #qi-hardware 2014-01-17 21:21 * DocScrutinizer05 reads >>...supports more than 170 langusges<< and thinks http://de.wikipedia.org/wiki/Karibik-Languste 2014-01-17 21:27 wej has quit [Ping timeout: 260 seconds] 2014-01-17 21:53 wej has joined #qi-hardware 2014-01-17 22:36 lekernel has quit [Quit: Leaving] 2014-01-17 23:25 [commit] Werner Almesberger: modules/pads.fpd: add -NOSILK variants; add silk measurements for rectangular pads (master) http://qi-hw.com/p/kicad-libs/76039af 2014-01-17 23:47 and we have http://downloads.qi-hardware.com/people/werner/anelok/tmp/ybox-draft-20140118.* versions 2014-01-17 23:48 made the ground on the RF side a bit nicer, moved the TPs around some more, and added a TP on VBUS, for production testing