| 00:09.27 | SpeedEvil | wishes gold was $20/oz or so. |
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| 15:43.46 | delirus | Does anyone here have experience with kdrive? |
| 15:45.06 | florian | a little bit |
| 15:45.38 | delirus | I have it compiled, but basically just need to know if it will still function if I get rid of all of its dependencies. |
| 15:46.34 | florian | you can disable quite a lot at compile time |
| 15:46.35 | delirus | The kdrive site says "completely self-contained" but is a bit vague, in addition to being quite old. |
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| 15:48.23 | delirus | I'm basically using a gentoo stage to compile a very tiny busybox/x system. And it seems to like pulling in a lot of unnecessary dependencies 8) |
| 15:49.35 | delirus | Oh well. I guess I'll just compile it, test, and remove one package at a time until it doesn't. Thanks. |
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| 18:51.06 | prpplague | GPSFan: don't suppose you know of a good i2c to pwm controller chip? |
| 18:52.48 | SpeedEvil | I vaguely remember some freescale stuff. |
| 18:52.55 | SpeedEvil | Or that may have been CAN |
| 18:53.05 | GPSFan | prpplague, not off hand, I never had need of one. sorry |
| 18:53.26 | prpplague | yea me either |
| 18:53.47 | prpplague | seems like that would be a popular item, but i haven't seen any |
| 18:53.55 | SpeedEvil | There are lots of them - sold as LED drivers |
| 18:54.05 | GPSFan | prpplague, btw wiki updated for 2.6.39, not much new or changed since 2.6.39-rc6 |
| 18:54.28 | prpplague | GPSFan: yea was just about to check the wiki for the .39 release |
| 18:54.35 | prpplague | SpeedEvil: yea thats what i was thinking as well |
| 18:54.49 | prpplague | SpeedEvil: just can't find one that kind of mets the specs i need |
| 18:55.05 | prpplague | SpeedEvil: i am almost considering using an attiny4 |
| 18:55.23 | SpeedEvil | I think the PWM chip I was thinking about from freescale was CAN on reflection. |
| 18:55.38 | SpeedEvil | yeah - it's a bit silly how sometimes that's the cheapest way nowadays |
| 18:56.01 | SpeedEvil | Is this for the backlight for the thingy? |
| 18:56.59 | prpplague | SpeedEvil: yea, for a lvds panel |
| 19:00.23 | SpeedEvil | Or even a pic - only .34 each@100 |
| 19:00.31 | SpeedEvil | attiny may be easier to program I suppose |
| 19:03.59 | prpplague | yesa |
| 19:04.08 | prpplague | at least for me it is |
| 19:10.27 | prpplague | SpeedEvil / GPSFan this might work - http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=568-3237-1-ND |
| 19:10.37 | prpplague | has 4 outputs and i really only need one |
| 19:11.12 | SpeedEvil | :) |
| 19:11.19 | SpeedEvil | Creeping features. |
| 19:12.48 | SpeedEvil | I don't recall seeing anything cheaper |
| 19:15.42 | prpplague | checks for linux driver |
| 19:16.30 | prpplague | yep supported |
| 19:26.38 | prpplague | http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=568-4934-1-ND |
| 19:27.41 | kergoth | hrm, i think its time to buy a pandaboard or beagleboard. getting rusty with real hardware |
| 19:27.43 | kergoth | heh |
| 19:28.12 | SpeedEvil | I assume there are no pwm thingies on the SoC?/// |
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| 19:31.07 | prpplague | SpeedEvil: yes and no |
| 19:31.51 | prpplague | SpeedEvil: yes there are some, but they aren't brought out to the expansion header |
| 19:33.33 | SpeedEvil | Ah. |
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| 21:19.48 | GPSFan | prpplague, I couldn't find one that just had a single output, but in that package, the 9633 isn't a bad solution, cheap & small. |
| 21:20.12 | prpplague | GPSFan: yea i found the PCA9530 |
| 21:20.23 | prpplague | GPSFan: its dual port |
| 21:20.33 | prpplague | GPSFan: i'll use one led point as enable pin |
| 21:20.46 | prpplague | GPSFan: the other as the pwm backlight control pin |
| 21:20.56 | GPSFan | prpplague, swell. |
| 21:21.49 | prpplague | price looks good and both mouser and digikey stock it |
| 21:22.13 | SpeedEvil | :) |
| 21:22.51 | GPSFan | I musta scrolled right by the 9530 ;>P |
| 21:23.27 | prpplague | hmm |
| 21:23.29 | prpplague | interesting |
| 21:23.34 | prpplague | the pca9633 is cheaper |
| 21:24.52 | prpplague | thinks he might go with the pca9633 instead |
| 21:28.09 | SpeedEvil | How many GPIOs are htere free? |
| 21:28.29 | SpeedEvil | 4->R2R->... |
| 21:33.12 | prpplague | SpeedEvil: what were you asking? |
| 21:33.24 | SpeedEvil | LED brightness |
| 21:33.40 | prpplague | SpeedEvil: yes? |
| 21:33.42 | SpeedEvil | 16 levels - R2R DAC and something. |
| 21:33.55 | SpeedEvil | Probably not sane. |
| 21:34.11 | prpplague | SpeedEvil: ahh no, the input is a PWM |
| 21:34.14 | SpeedEvil | Maybe less than 3 lines with tristate. |
| 21:34.27 | prpplague | SpeedEvil: measured duty cycles |
| 21:34.30 | SpeedEvil | I meant with a 555 to convert again. |
| 21:34.36 | prpplague | SpeedEvil: ahh |
| 21:34.44 | SpeedEvil | Sorry - I just woke up after a nap, and am not fully awake. |
| 21:34.51 | prpplague | SpeedEvil: yea i looked at that |
| 21:35.00 | prpplague | SpeedEvil: ends up being too expensive |
| 21:35.26 | SpeedEvil | The cheapest way is probably a PIC, and some programming I suppose, with an external FET. |
| 21:35.40 | SpeedEvil | But another micro o program has its own costs. |
| 21:35.48 | prpplague | really no need for the FET |
| 21:36.10 | prpplague | SpeedEvil: the attiny4 is about $0.70 |
| 21:36.21 | prpplague | SpeedEvil: the pca9633 is $0.84 |
| 21:36.35 | SpeedEvil | oh - I missed that I was coming up with $2ish |
| 21:36.45 | SpeedEvil | ^, |
| 21:36.53 | prpplague | SpeedEvil: and the pca9530 is $0.92 |
| 21:38.05 | SpeedEvil | Probably the better way to go then. :) |
| 21:39.15 | prpplague | SpeedEvil: yea use the pca9633 just bring of the two unused signals to pads |
| 21:39.36 | SpeedEvil | yup. |
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