#robotics Logs

Jun 27 2014

09:19 rue_more I'm starting to think that 80% of commercial screws are m3
09:57 SlaveToTheSauce except those damn deceptive 1/8" ones!
13:11 MrCurious briliant. got timing belt and matching wheels, and turns out i have 4 beefy steppers that have compatible pattern to the timing belt!
14:11 GuShH rue_more: sorting.... screws...
14:11 ShH hands rue a plastic
14:29 deshipu guys, what do you think? http://oi62.tinypic.com/2reiec7.jpg
14:30 SlaveToTheSauce i have never seen white servos before
14:31 SlaveToTheSauce also you have bad taste in distros :V
14:31 deshipu they are from hobby king
14:31 deshipu SlaveToTheSauce: well, I use xubuntu
14:31 SlaveToTheSauce i rest my case!!
14:31 SlaveToTheSauce got a video of it walking?
14:32 SlaveToTheSauce ive never quite gotten my head around a quadruped gait
14:32 deshipu the thing is, I added the extra 4 servos for the feet, and now it draws too much power from my power bank, so I ordered a lipo and UBEC, and they will come on Monday
14:32 deshipu there are several gaits, it's quite fun
14:33 deshipu I had it doing the "rowing", where it sits on the ground, moves all feet forward together, liftes itself, moves forward, and sits back on the ground
14:33 deshipu for more complex ones I need the feet servos
14:34 deshipu also, the legs are a little too close together for it to be very stable, so I will have to make small steps
14:34 deshipu but I'm learning a lot
14:34 SlaveToTheSauce cool
14:35 SlaveToTheSauce what're the electronics?
14:36 deshipu pololu maestro 18 talking through the serial with a raspberry pi
14:36 deshipu I have a gyro sensor that I want to hook up to the pi via i2c, but didn't do it yet
14:38 SlaveToTheSauce just a gyro? won't be of much use in this sort of application, they drift too much
14:38 SlaveToTheSauce with an accelerometer (or just an accelerometer) would do though
14:39 deshipu it's a 9-axis gyro with accelerometer
14:39 SlaveToTheSauce ah yeah ok you're set then
14:39 SlaveToTheSauce should call it an IMU or MARG array or something then because the gyro is only a third of it :)
14:39 deshipu but programing it will be quite some work :)
14:40 SlaveToTheSauce yeah sensor fusion is something i am currently procrastinating on
14:40 deshipu what I want is to use the gyro to know when the leg touches the ground
14:40 deshipu and to keep it level on unlevel terrain
14:40 deshipu but first, the basics, inverse kinematics
14:41 SlaveToTheSauce you may be better off with switches on the feet but I dunno
14:41 deshipu yeah, that's no challenge :)
14:41 deshipu I will see how far I can get
14:42 deshipu in the worst case, I will just use the accelerometer to wildly flail all the legs when it's picked up
14:42 SlaveToTheSauce excellent
14:42 SlaveToTheSauce got anything in mind for feet? i imagine it slips around a lot with just meccano beams
14:42 deshipu red pieces of rubber
14:43 deshipu but I didn't find the right ones
14:43 SlaveToTheSauce me neither
14:43 deshipu some rubber caps for screws or something, I need to go hunting to a hardware store
14:43 deshipu I have a red rubber band, I could cut it, make holes and attach witch screws
14:43 SlaveToTheSauce they kind of need to be pointy for the ik to be valid, but sufficiently rubby things are usually...also squishy
14:44 deshipu I'm not sure how much precision I need
14:45 deshipu in the worst case, I will give up on IK and just hardcode some dance moves into it
14:45 SlaveToTheSauce ik is definitely worth it, being able to move it around arbitrarily rules
14:47 SlaveToTheSauce https://www.youtube.com/watch?v=TXvZWTZWN8A here's my hex
14:47 deshipu wow, with a cemera, cool
14:48 deshipu do you do any image processing?
14:48 deshipu or is it just for remote control?
14:48 SlaveToTheSauce not other than h.264 encoding
14:48 SlaveToTheSauce i plan on doing vision-based SLAM but it won't be with those cameras
14:52 deshipu how do you trasmit it? wifi?
14:52 SlaveToTheSauce yep
14:56 deshipu makes sense
14:56 deshipu with all the ready to use stuff for it
15:01 SlaveToTheSauce i think it's because the servos aren't designed to actuate things with a large moment of inertia, like the whole leg consisting of 3 more servos
15:02 SlaveToTheSauce they have plenty of torque but their control loop isn't stable in those circumstances
15:02 deshipu ah, so they get a positive feedback loop
15:02 SlaveToTheSauce yeah
15:03 SlaveToTheSauce i am looking at designing my own servo driver boards with fancier interfaces than that dumb pwm line
15:03 SlaveToTheSauce allowing for position and torque feedback, etc
15:03 SlaveToTheSauce ready-made servos with those features are ridiculously expensive
15:04 deshipu well, I opened my servos, and they have a whole potentiometer inside of them, so I could solder an extra wire in there, I think
15:04 deshipu just to check the position
15:05 SlaveToTheSauce yes that is an option, assuming you don't introduce noise or perturb the voltage in the process
15:06 deshipu I know they did it in some open hardware hexapod
15:06 SlaveToTheSauce are you thinking of openservo perhaps?
15:07 SlaveToTheSauce those boards are like $20 each
15:07 SlaveToTheSauce twice as expensive as my servos were in the first place
15:07 SlaveToTheSauce and with 24 of them that really adds up :/
15:07 SlaveToTheSauce think i can hit a unit cost of $9-10 in a run of that size if i roll my own
15:09 deshipu no, I think it was something called Spidey
15:10 deshipu https://github.com/RobotsWar/Spidey
15:11 deshipu but I might be mixing them up
15:15 SlaveToTheSauce i had no idea there were dynamixels at that price point
15:15 SlaveToTheSauce i guess they've only been out for a couple months
15:16 deshipu I think I mixed it up after all
15:16 SlaveToTheSauce yeah they're off the shelf servos, Dynamixel XL-320
15:16 SlaveToTheSauce 20 bucks though, pretty reasonable
15:17 deshipu my servos are like $5 a piece :P
15:17 SlaveToTheSauce yeah those are little 9g-class ones though right
15:17 SlaveToTheSauce you can get those for <$2 :p
15:17 deshipu 2.5kg torque
15:18 SlaveToTheSauce that is a unit of mass, not torque!
15:18 deshipu http://www.hobbyking.com/hobbyking/store/__23486__HK15148B_Digital_Servo_19g_2_8kg_0_14s.html
15:18 deshipu well, they use it here
15:19 SlaveToTheSauce hobby sites use awful nonsensical data
15:19 SlaveToTheSauce they mean kg*cm which is STILL not a unit of torque but eh close enough
15:21 deshipu well, as long as they are consistent and I can compare them
15:21 adam789654123 what is metric for torque, mayb cm/ft or something?
15:21 adam789654123 uhh
15:21 deshipu newton :)
15:21 adam789654123 what is metric for torque, mayb wt/ft or something?
15:21 adam789654123 ok
15:21 SlaveToTheSauce torque is force*distance
15:21 adam789654123 forgot
15:21 adam789654123 ohh
15:21 adam789654123 been awhile
15:22 adam789654123 i should refesh
15:22 SlaveToTheSauce and mass and weight are not the same thing
15:22 adam789654123 yeah, i remember about that
15:22 adam789654123 just dont remember why
15:22 adam789654123 oh
15:22 deshipu gravity varies
15:22 adam789654123 mass is volume
15:22 SlaveToTheSauce because the acceleration due to gravity changes depending on where you are
15:22 adam789654123 right?
15:22 deshipu adam789654123: no
15:22 SlaveToTheSauce ahhhhhhwhat
15:22 adam789654123 grrr
15:23 adam789654123 so my mass changes in outerspace i guess
15:23 deshipu adam789654123: mass is inertia, pretty much
15:23 adam789654123 ok
15:23 deshipu adam789654123: and weight is the force by which it is pulled down
15:23 adam789654123 does the mass of the same object change say, on another planet?
15:23 deshipu adam789654123: take a baloon
15:23 adam789654123 ok
15:24 SlaveToTheSauce the mass doesn't change, but the weight does
15:24 deshipu adam789654123: it has negative weight, but positive mass
15:24 adam789654123 i see
15:24 SlaveToTheSauce mm i guess those cheap dynamixels actually are pretty wimpy
15:25 adam789654123 but mass is not volume though
15:25 adam789654123 right?
15:25 SlaveToTheSauce correct
15:25 deshipu adam789654123: no
15:25 adam789654123 so there is something im not getting about the concept
15:25 deshipu adam789654123: mass is not volume, volume is mass times density
15:25 adam789654123 yeah
15:25 SlaveToTheSauce rated for 0.39 Nm which is 3.9 kg*cm....the ones i am using are rated for 15kg*cm and are probably a bit less but not that much less
15:25 adam789654123 need to refresh
15:26 adam789654123 in physics these things have quantifiable meanings
15:26 adam789654123 its really cool
15:26 adam789654123 its just been awhile since i thought in that way
15:26 SlaveToTheSauce rigor is very nice.
15:26 adam789654123 and played with calculation and stuff
15:26 adam789654123 it was fun
15:26 deshipu adam789654123: it's funny how you only have like 3 real units, all the rest can be expressed as combinations of these
15:27 adam789654123 yeah
15:27 adam789654123 but i dont remember what the fundamental ones were
15:27 SlaveToTheSauce it's actually 7
15:27 SlaveToTheSauce and there are several different systems with different base units
15:27 adam789654123 like joules was high up in abstraction
15:27 deshipu well, at the minimum you need time and distance
15:27 adam789654123 right
15:27 SlaveToTheSauce http://en.wikipedia.org/wiki/SI#Base_units
15:27 deshipu or time and mass
15:27 adam789654123 yes
15:28 deshipu hmm
15:28 adam789654123 is mass one of the fundamental ones though?
15:28 SlaveToTheSauce yes
15:28 adam789654123 ok
15:28 adam789654123 so time, distance and mass
15:28 deshipu well, you can pick any, reallty
15:28 deshipu really
15:28 deshipu they can be expressed as combinations of each other
15:28 SlaveToTheSauce okay i guess cgs is acutally based on the 3
15:29 SlaveToTheSauce cgs is really fucked when you want to cover anything related to electrodynamics though
15:29 SlaveToTheSauce like there's nearly-fundamental derived units that are the square root of another unit
15:29 SlaveToTheSauce gets very messy
15:30 adam789654123 yeah
15:30 deshipu hmm, you can express distance in time and mass though, no?
15:30 SlaveToTheSauce huh?\
15:30 adam789654123 well, im interested in the calucations, and considering the implications, and it gets you interested in, well, how you might use the relationships, and yadayada
15:30 deshipu like "how far will a 1kg fall in 1s"
15:31 adam789654123 exactly
15:31 SlaveToTheSauce "on the surface of the earth at a particular altitude and latitude"?
15:31 SlaveToTheSauce gravitational acceleration is not constant we just covered that!
15:31 SlaveToTheSauce you've got a very arbitrary implicit measurement in there
15:31 adam789654123 or what is the relationship between the power an appliance consumes and the action of a weight over a given period of time
15:31 deshipu hmm, ok, so for acceleration you need distance and time
15:32 deshipu I guess you can't reduce the distance out of the equation then
15:32 adam789654123 i think actually acceliration was like as far as i got
15:32 SlaveToTheSauce http://en.wikipedia.org/wiki/SI_base_unit the actual article is a bit more clear i guess
15:33 adam789654123 like i was trying to calculate accelerations, and play with the concept of acceleration, and i got kind of, well, roadblocked a bit
15:33 deshipu a set of mutually independent dimensions
15:33 deshipu ok
15:33 deshipu noted
15:33 SlaveToTheSauce you need basic calculus to make the concept walk adam789654123
15:33 deshipu adam789654123: you actually just need to grasp derivatives
15:33 adam789654123 yeah
15:33 SlaveToTheSauce otherwise you're just memorizing dumb equations that don't mean anything conceptually
15:33 adam789654123 never took calculus
15:34 deshipu adam789654123: all physics is basically just derivatives
15:34 adam789654123 but hey, probably pick it up alot easier now
15:34 adam789654123 having tried to do it without knowing it
15:34 SlaveToTheSauce between differentiation/integration and unit analysis you can get a LOT of stuff done
15:34 adam789654123 yeah
15:34 SlaveToTheSauce across a dozen fields
15:34 adam789654123 ive done some derivites
15:34 adam789654123 but just on my own
15:34 adam789654123 i think it was to calculate the tangent of a parabola
15:34 adam789654123 does that sound correct?
15:35 SlaveToTheSauce yes
15:35 adam789654123 very eloquent things, these derivatives
15:35 SlaveToTheSauce now, acceleration is the derivative of velocity is the derivative of position
15:35 adam789654123 ill plan to roll my sleeves up with this stuff
15:35 SlaveToTheSauce and you can see how cleanly it all fits together
15:35 adam789654123 ok
15:36 adam789654123 well, not yet anyway, but if you point me in the right direction, i think i can get it one day
15:36 adam789654123 i mean, i kind of get it
15:36 adam789654123 but its not really fair for me to say, i get it
15:36 deshipu adam789654123: have you seen those quadcopters balancing a pole on them, or such?
15:36 adam789654123 more like, i get what your saying
15:36 adam789654123 no
15:37 deshipu adam789654123: all done with derivatives and integrals
15:37 adam789654123 but they are very impressive
15:37 adam789654123 balancing a pole?
15:37 adam789654123 you have a link?
15:37 deshipu https://www.youtube.com/watch?v=pp89tTDxXuI
15:38 SlaveToTheSauce and that's applied control theory, which is a couple steps past this stuff
15:38 SlaveToTheSauce still very much in the same domain though
15:40 adam789654123 WOW!!!!!
15:40 adam789654123 im saving that sh*t!
15:40 deshipu right, you have to adjust for physical world
15:40 adam789654123 but im blown away how it all glues together
15:41 adam789654123 i understand about the difference between theoretical and defacto
15:41 deshipu SlaveToTheSauce: by the way, I love your prototype with pencils :)
15:41 adam789654123 but it is really something to see theoretical physics used to a such splendid extent
15:42 adam789654123 or application
15:42 adam789654123 really fricken cool
15:42 SlaveToTheSauce hehe
15:42 SlaveToTheSauce i still have it mostly-assembled but some of the pencils are unglued
15:42 SlaveToTheSauce i pick it up and let it flop around under its own weight to remind myself of my progress for morale purposes
15:43 deshipu SlaveToTheSauce: I wonder why they made the servo mounts the way they did, they are pretty much useless and I always end up gluing the servos to something anyways
15:43 SlaveToTheSauce yes they're damn awful
15:43 SlaveToTheSauce the answer is they were never intended to drive legs
15:43 deshipu I suppose they make sense for planes
15:44 SlaveToTheSauce yeah they're designed for aerodynamic control surfaces linked by stiff wires hooked through the horn
15:44 SlaveToTheSauce and i guess rc car steering, dunno what that mechanism looks like though
15:45 SlaveToTheSauce but yeah nothing where the servo spline is actually a weight bearing rotational axis
15:46 SlaveToTheSauce the ones i use have a little protrusion on the opposite side that fits into a bushing in the bracket though, so it actually works for that purpose without any hairpulling
15:46 deshipu I was considering drilling a hole in there in mine, and putting a screw there
15:46 deshipu there is space inside them
15:46 adam789654123 i cant get over that video!
15:46 deshipu adam789654123: have you seen the airplane flying in the garage?
15:47 adam789654123 no
15:48 adam789654123 uhhggggg
15:48 deshipu adam789654123: https://www.youtube.com/watch?v=B42SW84eT0o
15:48 adam789654123 haha
15:48 adam789654123 awsome
15:50 adam789654123 the derivative thing makes sense, with that pole balancing thing
15:50 adam789654123 i mean
15:50 adam789654123 wait
15:50 adam789654123 i have to think about it more
15:51 SlaveToTheSauce there's a few steps in between
15:51 SlaveToTheSauce think about cannonballs and satellites first :)
15:51 adam789654123 im imagining the path of the pole as following a parobola
15:52 adam789654123 but we would be intereste in the orientation of the pole
15:52 adam789654123 and its path
15:52 SlaveToTheSauce nope
15:52 adam789654123 grr
15:52 adam789654123 oh well
15:52 SlaveToTheSauce well yes to the latter, but no the dynamics are a bit more complicated than that
15:53 adam789654123 yeah
15:53 deshipu it's such a shame the laser scanners are so expensive
15:53 adam789654123 that was my, sort of double take
15:53 SlaveToTheSauce building one is on my ever-expanding list deshipu
15:55 adam789654123 thats rc place is intereriting
15:55 adam789654123 i like how they used a virtual reality model also
15:56 deshipu there was some project to make a relatively cheap lidar, I think it was http://www.robotshop.com/en/rplidar-360-laser-scanner.html
15:56 adam789654123 so i guess the 2d images would give the plane information on where it was oriented
15:56 adam789654123 on the virtual map
15:57 adam789654123 any they would program the path on the map that the plan should feasibly be able to take
15:57 adam789654123 very interesting
15:57 deshipu adam789654123: now imagine it applied in the army, and it gets scary
15:57 deshipu adam789654123: for indoor homing missiles
15:57 adam789654123 i hear ya there
15:58 adam789654123 thats aways the way it goes, no?
15:58 adam789654123 somebody makes something cool, somebody else is figuring how they can kick other peoples ass with it
15:58 adam789654123 f*ckers
15:58 deshipu hopefully, the military people are getting too thick and the technology too complex for them to catch up ;)
15:58 SlaveToTheSauce lol that's a load of crap
15:59 adam789654123 its hard to say, right
15:59 adam789654123 who, me?
15:59 deshipu no, me
15:59 adam789654123 hmmm
15:59 SlaveToTheSauce no the military not being at the forefront of technology
15:59 SlaveToTheSauce is very far from correct
16:00 deshipu well, they have a little bit more requirements with respect to reliability and sturdiness
16:00 adam789654123 i also think it depends on the technology
16:00 deshipu also, you can do the same thing just getting a bigger missile and shooting through the wall, so why bother
16:00 deshipu it's cheaper that way
16:00 deshipu they are very practical
16:02 adam789654123 but yeah, im pretty sure there are military people who are very interested in applications for such technology
16:02 adam789654123 they are not exclusive though, in this regaurd
16:02 adam789654123 i wonder what other uses something like that could have
16:02 deshipu mapping interiors?
16:02 adam789654123 hmmm
16:03 adam789654123 i thought the quadrochoppers would be great for surveying
16:03 adam789654123 yeah
16:03 deshipu finding people in dangerous places?
16:03 deshipu quadcopters are power hungry
16:03 deshipu airplanes are much more efficient
16:03 adam789654123 im sure
16:03 adam789654123 ok
16:03 adam789654123 i handnt thought about it
16:03 adam789654123 but that makes sense
16:03 adam789654123 alot of sence
16:04 adam789654123 how about local delivery service?
16:05 adam789654123 you and your buddies can shuttle things to one another via the plane
16:05 SlaveToTheSauce the only advantage an aircraft has is being able to cover large distances by clearing obstacles at altitude
16:05 deshipu I'm a big fan of ballistics in that domain
16:05 SlaveToTheSauce a ground-based robot will still be way more efficient and effective and reliable for indoor stuff
16:05 deshipu SlaveToTheSauce: provided the floor is intact
16:05 deshipu but yeah
16:05 deshipu and not a walking one too
16:05 adam789654123 i guess its largly pushing the envolope, but not going to have direct application
16:05 adam789654123 but it shows how close the tollerances are
16:05 deshipu treads or some hybrid drives
16:05 adam789654123 thats pretty impressive
16:07 adam789654123 planes would be faster too
16:07 deshipu not indoors
16:07 adam789654123 so if you had a shuttle service, the planes could be far supperior
16:07 adam789654123 outdoors
16:07 adam789654123 say
16:07 deshipu but in the city, between buildings
16:07 deshipu sure
16:07 adam789654123 on a compound
16:07 adam789654123 say a big property
16:07 adam789654123 where you shuttle something around from one place to another
16:07 deshipu well, there was that book by Vernor Vinge, Rainbow's End
16:08 deshipu the guy is a futurologist and the book has a lot of near-future predictions of his
16:08 adam789654123 you're talking to Bob on the cell, or chat, and hes put something together, and shuttles it over to you
16:08 deshipu one of my favorites is the fedex's ballistic delivery gun
16:08 adam789654123 hmmm
16:09 deshipu they just calculate the place, and shoot the package, it lands on a simple parachute
16:09 deshipu it corrects for wind and suchm of course
16:09 adam789654123 haha
16:09 deshipu and has gps
16:09 deshipu it's the cheapest way
16:09 adam789654123 thats a pretty good low tech idea
16:09 deshipu it's actually pretty high tech
16:09 adam789654123 well
16:09 adam789654123 lower then the plane
16:10 deshipu you need the calculations, the gps, etc.
16:10 adam789654123 lower than a robotic plane livery service
16:10 deshipu what's important -- more foolproof
16:10 adam789654123 sure
16:11 deshipu it's a great book, by the way, highly recommended
16:11 adam789654123 foolproof balanced with the advantage it ofers apparently
16:11 adam789654123 i mean
16:11 adam789654123 what could be less foolproof then just walking it over
16:11 deshipu pneumatic mail
16:11 deshipu they still use it in some malls
16:12 deshipu of course you need to maintain the infrastructure then
16:12 adam789654123 its a great system
16:12 deshipu repair and clean it
16:13 deshipu SlaveToTheSauce: have you seen that Boston Dynamics hexapod?
16:13 adam789654123 they used to use pneumatic pressures to send signals in factories
16:13 SlaveToTheSauce they made a hexapod?
16:13 deshipu SlaveToTheSauce: the all-terrain one, with half-wheels
16:13 deshipu SlaveToTheSauce: https://www.youtube.com/watch?v=a0NFrA-Nx4Y
16:13 adam789654123 changes in pressure would indicate a change in some state
16:13 SlaveToTheSauce oh yeah that
16:14 deshipu it's very robust
16:14 adam789654123 must have been a nightmare to maintain
16:14 SlaveToTheSauce yeah. doesn't provide precise control but man does it ever chew through shitty terrain
16:15 deshipu SlaveToTheSauce: I wonder if it wouldn't be better with whole wheels of the same size though
16:16 SlaveToTheSauce wouldn't be able to do stairs
16:16 SlaveToTheSauce smaller protrusions, etc
16:16 adam789654123 o dont think so
16:16 adam789654123 i
16:16 adam789654123 it can pull itself over things
16:16 adam789654123 great design
16:16 adam789654123 we even got to see it flip
16:16 adam789654123 very impressive
16:17 deshipu that's more what the military people want :)
16:19 adam789654123 im heading out soon
16:19 adam789654123 thanks for sharing stuff
16:19 adam789654123 and thanks for giving me a bit of a refersher with the Standart International Units
16:20 adam789654123 peace all
17:44 Loshki Cheaper lidars inside neato vacuum cleaners...
19:53 MrCurious when police initiate a high speed persuit in a city, i wonder why they dont just toggle all trafficc lights to red in all directions to enhance public safety
19:54 ace4016 i don't think all traffic lights have that functionality
19:56 chris_99 mm yeah
19:56 MrCurious some must
19:56 GargantuaSauce i think most do but it's a localized thing
19:56 GargantuaSauce ie the cop car has a coded IR strobe that activates it on demand
19:56 MrCurious just seems like it would make chases easier if they turned the streets in a 10 block radius into parking lots :)
19:57 GargantuaSauce yeah it would make sense
19:57 GargantuaSauce but on the other hand you know some idiot would accidentally leave it on and cripple rush traffic for half an hour
20:01 Tom_itx why not default them to green?
20:10 GargantuaSauce because the cop might want to turn left?
21:55 MrCurious hahaha someone in this game has the name 2girls1worldcup
22:32 Hyratel grrr... how do we not have any rubber cement or anything like? I need some kind of hard glue for a repair
22:38 Tom_itx silicon
22:38 Tom_itx hot glue
22:39 Tom_itx epoxy
22:39 Hyratel hot glue is too soft
22:39 Hyratel it's not a hard glue
22:39 Tom_itx superglue
22:40 Hyratel also it needs to be a self levelling glue
22:40 Hyratel ie, thin enough to flow
22:40 Tom_itx animal glue
22:42 rue_more sweeeet, the 6N137 arrived!
22:42 Tom_itx rue_more do you know about mysql field types?
22:42 rue_more their logic output optos, I think they are fast enough to do pwm over
22:42 rue_more Tom_itx, nope
22:43 rue_more did they not use standard types?
22:43 Tom_itx this has a field type of 'link to file'
22:43 rue_more int float
22:43 rue_more oooh
22:43 Tom_itx but the pdf doesn't open when selected
22:43 rue_more then its value is the contents of the file its pointed to
22:43 Tom_itx i also tried a jpg
22:43 Tom_itx no luck
22:43 rue_more hmm
22:43 rue_more how about txt
22:44 Tom_itx txt shows txt
22:44 rue_more not maulted at all?
22:44 Tom_itx but i need a link to open a file associated with the record
22:44 rue_more do you need to tell the browser what its expexting?
22:44 Tom_itx think: name rue_more, pictureid (ruemohr mugshot)
22:45 Tom_itx there's little documentation for this
22:45 Tom_itx i could try bmp
22:47 rue_more #mysql?
22:47 rue_more mysql might be getting hard to use now that its been bought out by oricle
22:48 MrCurious clever folk use postgresql rather than the mysql toy
22:49 Tom_itx this is an android app
22:50 MrCurious so you want a sql running on android?
22:51 Tom_itx i have several running but this one needs to link a file and open it
22:52 Tom_itx why can't android open .bmp files?
22:52 Tom_itx is it a pissing thing between MS and Google?
22:52 MrCurious http://stackoverflow.com/questions/4340710/hows-to-open-an-bmp-jpeg-image-using-java
22:53 MrCurious should have used lmgtfu
22:56 MrCurious Tom_itx: will that solve it?
22:56 Tom_itx no
22:56 MrCurious sry then
22:56 Tom_itx i'm not sure it's possible with this app
22:56 Tom_itx i was just trying something
22:56 MrCurious who uses bmp anyway?
22:57 Tom_itx i was just trying different file extensions
22:57 Tom_itx jpg didn't work either
23:00 Tom_itx hyperlink type would probably work but i want them stored locally
23:03 Tom_itx png doesn't work eitehr
23:03 MrCurious starting to look like its a different issue
23:03 Tom_itx it sees the file
23:03 MrCurious are you loading files over the net? or from local
23:04 Tom_itx tries to launch it with an app
23:04 Tom_itx but fails
23:04 Tom_itx local
23:04 MrCurious and you verified dthe images are good?
23:04 Tom_itx yep
23:04 MrCurious and permissions are sufficient :)
23:04 Tom_itx dunno about permissons
23:04 Tom_itx i assume they're ok
23:05 Tom_itx i can open them outside this app
23:05 Tom_itx inside, using the same apps they fail
23:06 MrCurious print out the first few bytes of file from the app
23:07 Tom_itx this isn't a big deal really. i can view them another way i just wanted to try this
23:08 Tom_itx this just made it a bit handier
23:09 Tom_itx i think i'll try the hyperlink type once
23:13 Tom_itx hyperlink brings up a website ok