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[05:46:51] <darsie> hi
[05:47:22] <darsie> How variable is the watchdog timer frequency at constant V,T?
[05:47:44] <darsie> At 1 s intervals.
[05:48:34] <darsie> not per cycle
[05:59:11] <darsie> The datasheet says "1024K (1048576) cycles 8.0 s" but 1024*1024/128E3=8.192 s.
[05:59:47] <darsie> So the 1 s interval is actually more like 1.024 s.
[06:00:07] <darsie> which is correctly rounded in the data sheet to 1.0 s.
[06:14:46] <darsie> boo
[06:30:02] <Lambda_Aurigae> yeah..everything is powers of 2 there.
[06:30:18] * twnqx is powerless instead :(
[06:30:37] <Lambda_Aurigae> watchdog timer is derived from main clock source as I recall but would have to look that up again.
[06:31:04] <twnqx> http://media.digikey.com/photos/Cree%20Photos/MCE4CT-A2-0000-00A5AAAA1.jpg ain't that a beauty
[06:31:42] <Lambda_Aurigae> so, being constant depends on your clock source...if you run from the internal RC oscillator then it can change depending on voltage and temperature quite a bit..as much as 3% I think..maybe more.
[06:32:03] <Lambda_Aurigae> twnqx, RGBI LED?
[06:32:17] <twnqx> RGBW (white), yes
[06:32:41] <Lambda_Aurigae> yeah...you meant what I know.
[06:32:44] <twnqx> i might buy a few of those
[06:32:56] <twnqx> even at 4€/piece
[06:32:58] <twnqx> ;X
[06:33:03] <twnqx> just because they are so beautiful
[06:33:12] <LeoNerd> RGBWs are nice. Though for e.g. stage lighting, you really want RGBWAs :)
[06:33:20] <LeoNerd> That horrible red+green mix doesn't make a nice amber
[06:33:26] <Lambda_Aurigae> what's the A?
[06:33:32] <Lambda_Aurigae> oh.
[06:33:52] <twnqx> that baby eats 350mA/color
[06:33:56] <twnqx> for a total of 9.5W
[06:34:03] <Lambda_Aurigae> my RGA LEDs are awesome...
[06:34:23] <Lambda_Aurigae> +/- RED, -/+ GREEN, ~ AMBER
[06:34:32] <Lambda_Aurigae> 2 pins.
[06:35:55] <LeoNerd> Eh.. that's not -really- amber, though. That's a mix of a spot wavelength of red and a spot wavelength of green that human eyes thinks looks about amber-ish
[06:36:09] <Lambda_Aurigae> hehe
[06:36:10] <Lambda_Aurigae> yeah.
[06:36:12] <LeoNerd> It doesn't work very well as a surface illuminator
[06:36:17] <Lambda_Aurigae> but they look pretty good.
[06:36:33] <LeoNerd> They look -terrible- on painted surfaces, via CCD cameras. :)
[06:36:35] <Lambda_Aurigae> well, these are rather old 5mm LEDs.
[06:36:46] <Lambda_Aurigae> at least 20 years old.
[06:36:59] <Lambda_Aurigae> I have,,something like 2000 give or take.
[06:37:10] <Lambda_Aurigae> probably take as I've used a few over the years.
[08:14:44] <LeoNerd> So... my SMT component order has arrived. All I have to say is: who did I let talk me into hand-soldering 0603s? ;)
[08:14:54] <LeoNerd> In hindsight I'm thinking I should have done 0805s for the lot...
[08:16:18] <twnqx> come on
[08:16:29] <Tom_itx> oh fooey!
[08:16:29] <twnqx> i did 01005 by hand (ok, i just wanted to try it)
[08:16:55] <LeoNerd> SOIC8 and SOT23s look fine though
[08:17:05] <twnqx> 0603 are huge :P
[08:17:08] <darsie> Lambda_Aurigae: The watchdog timer is a separate timer.
[08:17:10] <Tom_itx> LeoNerd, seriously... you will be glad you did
[08:17:13] <twnqx> you'll get used to them i nno time
[08:17:54] <twnqx> just remember to oversize the pads (in length) a bit for manual soldering
[08:18:17] <Tom_itx> meh
[08:18:45] <Tom_itx> ... maybe i did mod the eagle pads for mine. i'd have to look
[08:19:35] <Tom_itx> i think all i did was make the overall footprint smaller so the 'keepouts' weren't so wide
[08:20:07] <Tom_itx> been too long to remember really...
[08:27:41] <Tom_itx> one key to hand soldering is plenty of flux
[08:27:53] <Tom_itx> i use a flux pen and coat the pads first
[08:28:50] <Tom_itx> LeoNerd, get those tools i posted the other day from DX... they will help
[08:28:56] <LeoNerd> Tools?
[08:29:02] <twnqx> ... for stuff like that?
[08:29:17] <specing> LeoNerd: 0603 is childs play
[08:29:22] <Tom_itx> smt boxes and tweezers
[08:29:23] * twnqx uses flux on tqfp or tssop or similar, but on passives?
[08:29:27] <LeoNerd> Oh.. random thoughts: in Eagle, if I place a 0603 resistor, it thinks it can route the rounding plane through the gap inbetween, but if I place a 0603 cap it doesn't. Anyone any idea why?
[08:29:28] <specing> they can't choke on them like on 0803
[08:29:57] <twnqx> LeoNerd: larger keepout, or larger separation for power dignals?
[08:30:10] <Tom_itx> LeoNerd, probably minor pad differences don't allow the trace tolerance
[08:30:22] <LeoNerd> I'd hope both were using the same device shape. Actually I can check
[08:30:49] <LeoNerd> Oh. Interesting. The caps are C0603, the resistors are R0603
[08:31:19] <Tom_itx> :)
[08:31:28] <LeoNerd> From the Eagle 'resistor' library
[08:32:34] <Tom_itx> about half the time anymore i'll pull parts from other schematics i've already drawn so i don't honestly know if i've modded mine or not
[08:32:54] <LeoNerd> Ahhhhyes; very subtly different geometries in the package definitions, even though they're basically identical
[08:32:57] <LeoNerd> Well that's upsetting :/
[08:33:03] <Tom_itx> haha
[08:33:35] <Tom_itx> never mod a stock lib component.
[08:33:43] <Tom_itx> make a new one and put it in your own lib
[08:33:47] <LeoNerd> Hm? They're both stock
[08:33:52] <LeoNerd> Well, yah indeed
[08:33:58] <Tom_itx> if you ever upgrade then you'd be screwed
[08:38:11] <STS_Patrik> do you guys limit the amount of solder by partial mask on DFN thermal pads?
[08:39:07] <Tom_itx> http://tom-itx.ddns01.com:81/~webpage/boards/atmega32u4/atmega32U4_3.jpg
[08:39:10] <Tom_itx> that's how i did it
[08:39:36] <Tom_itx> and yes you can make the stencil pad smaller
[08:40:19] <STS_Patrik> had a few faulty DFN regulators where i suspect not enough paste got through the stencil for the pins, and the amount on the thermal pad lifts the whole component
[08:40:36] <Tom_itx> yeah
[08:41:09] <Tom_itx> i think the holes help wick some of the solder out of the way
[08:41:52] <STS_Patrik> found TI application note
http://www.ti.com/lit/an/sloa120/sloa120.pdf but they said nothing bout limiting it
[08:42:37] <Tom_itx> some parts may be glued on during pick n place too
[09:00:46] <LeoNerd> Tom_itx: (et.al):
https://www.youtube.com/watch?v=lrDyUj7ZfVI this makes it look easy enough. Would you recommend that way?
[09:08:52] <Tom_itx> i suppose you could
[09:09:03] <Tom_itx> i put it in place and stick both ends
[09:09:16] <LeoNerd> Hmmmm
[09:09:27] <LeoNerd> I liked the look of sticking one end entirely before doing the other
[09:09:27] <Tom_itx> he's got too much solder on the iron though
[09:09:38] <Tom_itx> well i stick one end too
[09:09:51] <Tom_itx> the flux under it will help wick the solder in place
[09:10:43] <Tom_itx> i put a dot of solder on the iron and touch where the part meets the pad
[09:11:05] <Tom_itx> the flux helps alot
[09:15:53] <Tom_itx> http://www.digikey.com/product-detail/en/CW8400/CW8400-ND/768491
[09:15:54] <Tom_itx> or such
[09:16:31] <Tom_itx> they discontinued the one i have because it's not RoHS
[09:17:35] <Tom_itx> http://www.digikey.com/product-detail/en/835-P/473-1033-ND/949475
[09:29:18] <theBear> they discontinued me cos i'm not rohs, one of gods special prototypes, too strange to live, too rare to die
[18:17:53] <LeoNerd> I think the time has come for me to actually order my board. I've stared at it in Eagle about a billion times. I've just now done a paper print to check all the components line up over it. I can't really think of anything left other than to hit the big red Go button. Which is actually purple. And labeled "Order"
[18:19:06] <N1njan33r> You should do this!
[18:43:49] <Tom_itx> LeoNerd, all the connectors etc have plenty of clearance?
[18:44:41] <LeoNerd> Yup. They're outlined on the board as well
[18:45:22] <Tom_itx> purple button time...
[18:45:51] <LeoNerd> Ohcrap. I just saw a bug. It's in .... the text on the silkscreen
[18:46:00] <LeoNerd> It calls itself an HVPP , when it's HVSP. Oops
[18:46:03] <Tom_itx> seeeee....
[18:46:07] <Tom_itx> i told you!
[18:46:52] <Tom_itx> you'll find at least one more after you push the purple button...
[18:47:16] <Tom_itx> i take it it's laen's board service?
[18:47:17] <N1njaneer> It gets easier as time goes on. :)
[18:47:45] <Tom_itx> i actually emailed him a time or two on a couple i did early on
[18:47:51] <Tom_itx> was able to catch it..
[18:48:10] <Tom_itx> since then he's gotten the web interface
[18:51:36] <LeoNerd> OSHpark
[18:51:49] <Tom_itx> yeah
[18:52:00] <Tom_itx> same guy
[23:05:14] <rue_house> "and forth came a day when all code was but just a copy and paste of other code, and thus keyboards were reduced to but the control, c, v, enter, and F1 keys (less windows keyboards that also included alt and delete)"
