#avr | Logs for 2015-12-31

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[07:24:25] <Lambda_Aurigae> hoppy nude beer!
[07:24:30] <Lambda_Aurigae> it's next year somewhere already!
[12:08:12] <Krampus> damn, is it the 31st?
[12:22:59] <Lambda_Aurigae> in some places.
[12:23:04] <Lambda_Aurigae> in others it's only january 1st.
[15:31:28] <studdentt> can't find my arduino >.>
[15:32:35] <Lambda_Aurigae> good for you.
[15:32:39] <Lambda_Aurigae> those things should be lost.
[15:34:56] <studdentt> but i needed it to troubleshoot a uC program D:
[18:11:01] <Jartza> https://www.youtube.com/watch?v=_1Wo3QKTgiw
[18:12:40] <Lambda_Aurigae> hoppy nude beer.
[18:16:58] <xrlk> anybody make an avr-powered quadcopter
[18:17:14] <Lambda_Aurigae> how can an avr power it? that's what batteries are for.
[18:17:17] <inkjetunito> frohes neues Jahr
[18:17:23] <xrlk> true Lambda_Aurigae
[18:17:42] <Lambda_Aurigae> avr controlled, yes, there have been several...most use ardweeny though.
[18:17:58] <xrlk> hmm
[18:18:07] <xrlk> arduino is not my thing
[18:18:46] <Lambda_Aurigae> there was an avr based drone autopilot.
[18:19:30] <Lambda_Aurigae> it started out on avr then moved to stm32
[18:19:31] <xrlk> have u ever made one
[18:19:53] <xrlk> i'm pretty uncertain when it comes to the hardware
[18:20:53] <Lambda_Aurigae> no clue who this u person is.
[18:21:56] <Lambda_Aurigae> there are dozens of hardware platforms you can base it on.
[18:22:29] <Lambda_Aurigae> or you can build it all from scratch with motors and such.
[18:23:01] <xrlk> i'd rather just pick a platform based on certain specs
[18:23:07] <Lambda_Aurigae> only quad I ever built was a tethered one.
[18:23:11] <xrlk> and focus on the software
[18:24:08] <Lambda_Aurigae> fed power up at 1000Hz 400V on some thin wire then downconverted to 5VDC at the quad.
[18:24:27] <Lambda_Aurigae> low current, high frequency, high voltage up the wire.
[18:25:49] <Lambda_Aurigae> used a very thin multistrand 2-conductor wire spool...got almost 300 feet altitude dragging the wire up.
[18:26:48] <Lambda_Aurigae> used a 6dof mems gyro and inertial sensor for stability sensing and an avr to run the balance and control.
[18:26:55] <Lambda_Aurigae> but didn't do much in the way of flying around.
[18:26:58] <Lambda_Aurigae> it was just up and down.
[18:27:49] <xrlk> that's all I care about right now
[18:28:10] <Lambda_Aurigae> we did that some,,,12 years ago.
[18:28:20] <xrlk> wow
[18:28:30] <Lambda_Aurigae> the mems guidance sensor was like 300 dollars back then.
[18:28:57] <Lambda_Aurigae> if we had batteries then like we have now we wouldn't have had to do the power tether.
[18:28:58] <xrlk> i bought a shitty 6dof gyro on aliexpress for a few bucks
[18:29:29] <Lambda_Aurigae> used a 2.4GHz camera.
[18:29:34] <xrlk> I've never used it
[18:29:58] <Lambda_Aurigae> the idea was for doing aerial photography without having to hire a plane.
[18:30:24] <xrlk> that's roughly what i'm trying to accomplish
[18:30:38] <Lambda_Aurigae> I think the guy I helped ended up getting 450 or so feet altitude with the wire but he changed wire after I left the project.
[18:31:27] <Lambda_Aurigae> 450 feet is above hobby altitude as I recall.
[18:32:12] <xrlk> ah
[18:32:18] <xrlk> is that from then
[18:32:20] <Lambda_Aurigae> so borderline legal....I suspect if you have a light on it then it is fine but I don't remember all the rules for such.
[18:32:21] <xrlk> or new legislation
[18:32:36] <xrlk> with the police state oversight on quadcopters
[18:32:46] <Lambda_Aurigae> 400 feet was regular hobby altitude for RC aircraft for many many years.
[18:33:14] <Jartza> so
[18:33:28] <Jartza> 2016 doesn't look much different than 2015
[18:33:33] <Jartza> same snow
[18:33:34] <Lambda_Aurigae> never does.
[18:33:40] <Lambda_Aurigae> SSDF
[18:33:48] <Casper> in the usa, any aircraft of more than .55lbs must be registered
[18:34:06] <Lambda_Aurigae> yup.
[18:34:25] <Casper> but they fucked up the description
[18:34:25] <xrlk> like a decade ago I had a toy RC airplane
[18:34:28] <Lambda_Aurigae> actually, by the rules, I believe it is the pilot that needs to be registered with the pilot's registration number on the craft being flown.
[18:34:32] <xrlk> one you tossed and then controlled
[18:34:33] <Casper> they talk about unmanned aircraft
[18:34:35] <xrlk> would that be a now
[18:34:38] <xrlk> *drone
[18:34:46] <Lambda_Aurigae> xrlk, yes, it's now a drone.
[18:34:47] <Casper> without specifying what unmanned mean....
[18:35:04] <Lambda_Aurigae> all RC aircraft over half a pound,,with or without camera, is considered a drone these days.
[18:35:13] <xrlk> ok
[18:35:34] <Lambda_Aurigae> used to be a drone was an autonomous craft.
[18:35:46] <Lambda_Aurigae> but the drone definition has changed of late.
[18:43:24] <Lambda_Aurigae> now drone and UAV are the same thing.
[18:43:55] <Lambda_Aurigae> any unmanned aircraft is considered such. and anything over 0.55 pounds needs a registration number.
[18:48:51] <Lambda_Aurigae> to answer the question asked on the subject first,,,yes, there are AVR based quadcopter controllers out there...one must just search.
[18:49:11] <Lambda_Aurigae> most of them are arduino based, however, because it's the IN thing.
[19:01:22] <Jartza> nothing wrong with using atmega, though :)
[19:01:54] <Lambda_Aurigae> nope.
[19:07:22] <Jartza> well. nothing wrong in using arduino, either, if that's how you get stuff done.
[19:07:31] <Jartza> I just personally don't want to use it. too bloaty.
[19:07:55] <Lambda_Aurigae> autopilots for full size aircraft were done with processors a lot less powerful than an atmega32 back in the day.
[19:08:03] <Jartza> yep
[19:08:32] <Lambda_Aurigae> hell, the guidance computer for the apollo missions was less powerful than an attiny85.
[19:10:34] <Jartza> not even comparable in any level
[19:10:47] <Jartza> less powerful than vic-20
[19:13:32] <Lambda_Aurigae> actually, it seems to have had 12 to 32 K words(12 bit) of memory..but only ran just over 1.024MHz.
[19:13:33] <Jartza> Lambda_Aurigae: thought about that microchip little sram chip a bit more
[19:13:38] <Lambda_Aurigae> or right at 1.024MHz
[19:13:46] <Jartza> I might give it a try
[19:13:53] <Jartza> 480x240 pixels
[19:13:53] <Lambda_Aurigae> is a nifty little chip.
[19:13:56] <Jartza> 16 colors
[19:14:03] <Jartza> 80x30 characters double buffered
[19:14:15] <Jartza> (or 480x240 pixels graphics)
[19:14:50] <Jartza> but I was thinking about the "double buffering"
[19:14:59] <Jartza> I might actually make it a bit more interesting
[19:15:11] <Jartza> like, double-width-pixel-line-buffer
[19:15:29] <Lambda_Aurigae> with enough extra ram you can do some fun scrolling effects too.
[19:15:42] <Jartza> where you could actually set the viewport to any place horizontally in that double-screen-wide space
[19:15:50] <Lambda_Aurigae> yup.
[19:15:59] <Lambda_Aurigae> can do double wide and double high with enough ram.
[19:16:05] <Lambda_Aurigae> then scroll all over.
[19:16:58] <Jartza> that 1Mbit chip could give that 480x240x16 as double
[19:17:10] <Jartza> and 480x240 could nicely do 80x30 with 6x8 pixel font
[19:17:21] <Lambda_Aurigae> yup.
[19:17:50] <Jartza> I'm also fiddling a bit more with attiny85 pwm
[19:17:54] <Jartza> it seems to be quite nice ;)
[19:18:05] <Jartza> thinking of clocking the sram from pwm :D
[19:18:37] <Jartza> that could be very very neat trick too
[19:18:43] <Lambda_Aurigae> yup.
[19:18:51] <Jartza> because slowing down clock... you get zoom!
[19:19:49] <Lambda_Aurigae> hehe.
[19:20:56] <Lambda_Aurigae> at least horizontal zoom.
[19:21:00] <Jartza> yes
[19:21:15] <Jartza> well, vertical is easy too. just redraw lines
[19:21:36] <Jartza> anyways with 240 vertical resolution you need to redraw each horizontal line twice
[19:21:45] <Jartza> then just draw it 3 times... or 4... or 5
[19:21:55] <Lambda_Aurigae> yup.
[19:24:17] <Jartza> not sure if attiny85 is a good chip to control that all, but whatta heck
[19:24:43] <Lambda_Aurigae> not like it was the perfect chip to make a VGA controller with to start with either.
[19:24:44] <Lambda_Aurigae> but,,,
[19:30:27] <Jartza> well yea :D
[19:39:57] <Jartza> which reminds me, I need to update the BW version of that "ansitester" too
[20:04:18] <Jartza> mmkay
[20:04:18] <Jartza> https://www.youtube.com/watch?v=Vw5xGuLFy8Q
[20:06:55] <Jartza> it's not that bad in B/W either
[20:27:55] <Xark> Nice. Like a TRS-80 in "wide character" mode. :)
[20:31:22] <Xark> (E.g. https://imgur.com/uwoI8ya )
[20:35:20] <Jartza> Xark: the graphics-mode is inspired by TRS-80 too :)
[20:35:44] <Xark> Right. :)
[20:35:57] <Jartza> instead of character, a byte in that character place is drawn as 2*4 pixels