#robotics Logs
Feb 11 2012
#robotics Calendar
00:00 XSerpentX yep
00:00 rue_mohr yea, UPS cable.
00:00 XSerpentX i shall use it for my noose
00:00 rue_mohr ok, can you work out which end is the pc end where 2 and 3 are used
00:00 rue_mohr chop off the ups end, and use the wires?
00:01 XSerpentX ya
00:01 XSerpentX guess that is a good idea
00:01 XSerpentX well
00:01 XSerpentX wait
00:01 XSerpentX it says null modem on them
00:01 XSerpentX ?
00:01 rue_mohr so 2<--->3
00:01 rue_mohr 3<---->2
00:01 rue_mohr ?
00:01 rue_mohr 5<---->5
00:02 rue_mohr iirc ups cables do not have 5<->5
00:03 rue_mohr 222 2200pf... 2.2nF.... m u n p.....0022uF...
00:03 rue_mohr well?
00:03 XSerpentX ok
00:03 XSerpentX so
00:03 XSerpentX i think
00:03 XSerpentX i fucked up
00:03 XSerpentX i think i thought
00:04 XSerpentX pin 1
00:04 XSerpentX was where pin 5 is
00:04 XSerpentX like i had them all backwards
00:04 rue_mohr cool
00:04 XSerpentX i guess the diagrams i was looking at
00:04 XSerpentX were pointing as tho
00:04 rue_mohr mirrored
00:04 XSerpentX they were from in the cable
00:04 XSerpentX ya
00:04 rue_mohr so want to try 2-3 jumper again?
00:05 XSerpentX ya
00:05 rue_mohr we WILL get to step 2!
00:05 XSerpentX k rehooking up
00:05 rue_mohr eventually
00:07 XSerpentX ya so
00:07 XSerpentX i just booted up realterm
00:07 XSerpentX and shorted 2-3
00:07 rue_mohr you didn't blow it up yet?
00:07 XSerpentX the real 2-3 :|
00:07 XSerpentX and echo works
00:07 rue_mohr yay!
00:07 rue_mohr ok, now!
00:08 rue_mohr were gonna positivly identify the transmitt pin FIRST
00:08 rue_mohr so!
00:08 XSerpentX it's null modem
00:08 rue_mohr which of 5 to 2 or 5 to 3 lights an led!
00:08 XSerpentX so pin 2
00:08 rue_mohr just do the led test!
00:08 XSerpentX right
00:08 XSerpentX k
00:08 rue_mohr make sure :)
00:09 XSerpentX 2
00:09 XSerpentX very SMALL flicker i should add
00:09 rue_mohr ok
00:09 rue_mohr so!
00:09 XSerpentX for every keypress
00:10 rue_mohr yes, thats absolute positive confirmation
00:10 rue_mohr want to take a break for a min?
00:10 e_mohr needs more
00:10 XSerpentX ya tea break
00:10 XSerpentX brb
00:10 rue_mohr get a drink/hit your head on a wall/pet the cat
00:26 XSerpentX ok
00:26 XSerpentX back
00:26 XSerpentX so u think my trans can handle the +-12v
00:26 XSerpentX it says u can put 12v for vcc
00:26 rue_mohr no
00:26 XSerpentX right now i just have 5v
00:26 rue_mohr use the 232
00:26 XSerpentX k putting it thrue
00:26 rue_mohr ok
00:26 XSerpentX i'll loopback it
00:26 XSerpentX first
00:26 XSerpentX to make sure it's all good
00:27 rue_mohr so, your pin pc2 goes to your ...
00:28 XSerpentX ok
00:28 rue_mohr so, your pin pc2 goes to your max232 8
00:28 XSerpentX max232 tied in and working
00:29 rue_mohr working, perfect
00:29 rue_mohr I think that deserves a break
00:29 rue_mohr just kidding :)
00:29 rue_mohr ok
00:29 rue_mohr so, now we can put your two rf modules into the mix
00:29 XSerpentX ok
00:30 rue_mohr know what to do?
00:30 rue_mohr so now we will be looping thru the rf
00:30 XSerpentX ok RX netduiono is live
00:30 XSerpentX my survo's r all powerd up
00:30 XSerpentX they are ready to kill
00:30 rue_mohr no netduino
00:30 XSerpentX now i'll put the ttyl thrue the trans
00:30 XSerpentX and send manual commands
00:31 rue_mohr both serial modules on the computer
00:31 rue_mohr transmitter on tx, and reciever on rx
00:31 rue_mohr both to the max232
00:31 XSerpentX hmm
00:31 rue_mohr no netduino
00:31 XSerpentX that's
00:31 XSerpentX genna ok
00:31 XSerpentX i guess if u say so
00:31 rue_mohr then we can make sure the modules will do serial properly
00:31 XSerpentX they do
00:32 rue_mohr sure sure
00:32 rue_mohr test it!
00:32 XSerpentX it's tough to move the rx curicuitry
00:32 XSerpentX it's got survoe's and
00:32 XSerpentX everything
00:32 XSerpentX i could run a wire back
00:32 rue_mohr can just unplug it?
00:32 XSerpentX it's about 3 ft tho
00:32 rue_mohr cant put them both ont he breaboard?
00:33 XSerpentX i'm using almost every port on the netduion
00:33 rue_mohr no netduino
00:33 rue_mohr breadboard
00:33 XSerpentX ya they are interconnected
00:33 rue_mohr put both the reciever and transmitter on the breadboard...
00:33 rue_mohr ?
00:36 rue_mohr interesting, sending the wrong tone to an old rc car can cause it to blow up
00:39 XSerpentX lies
00:40 rue_mohr the bridges can be shorted out if you command forward and reverse at the same time
00:40 rue_mohr the control circuit dosn't interlock the two circuits
00:40 rue_mohr er signals
00:41 XSerpentX oh nice
00:41 XSerpentX is it old school
00:41 XSerpentX like PWM signalls
00:41 rue_mohr no its tones
00:41 XSerpentX hmm
00:41 rue_mohr the tone decoder they use is AWESOME
00:42 XSerpentX ok well
00:42 XSerpentX i did this
00:42 XSerpentX i hooked pc tx to max rsin
00:42 rue_mohr they sample the freq into a counter, they drop the 3 least significant bits, and use the remaining 4 bit they have for hte forward/reverse signals
00:42 XSerpentX and then ttlout to RX TX
00:42 rue_mohr theu the max232 right!?
00:42 XSerpentX sorry
00:42 XSerpentX max232 ttlout to transmitter
00:43 XSerpentX then reciever to ttlin
00:43 XSerpentX and then rsout to pc
00:43 XSerpentX and i am getting pages of noise
00:43 XSerpentX i also saw this
00:43 XSerpentX with my netduino's over RF
00:43 XSerpentX so i filtered it all
00:43 XSerpentX for my command line
00:44 rue_mohr as I suspected
00:44 XSerpentX which is that !!!RXD#S#...etc
00:44 rue_mohr they use OOK, which sucks
00:44 XSerpentX i basically look at the RX buffer for R
00:44 XSerpentX when i find an R
00:44 rue_mohr can you get anything other than noise then?
00:44 XSerpentX i test for RXD S X Y F G L
00:44 rue_mohr so continious U
00:44 XSerpentX if i get all those
00:45 rue_mohr see if it goes thru ok
00:45 XSerpentX then i assume that data is intact
00:45 XSerpentX k
00:45 rue_mohr (U is 01010101)
00:46 XSerpentX uh
00:46 XSerpentX i want to say no
00:46 XSerpentX but
00:46 XSerpentX with all this noise
00:46 XSerpentX it's hard to say
00:46 rue_mohr capital U right?
00:46 XSerpentX like the noise is flooding in
00:46 XSerpentX ya
00:46 rue_mohr hmm
00:46 XSerpentX i also tried to send my command signal
00:46 XSerpentX it's really tought to see it tho
00:47 XSerpentX alot of this funcky F
00:47 rue_mohr OOK just means they turn the transmitter on and off
00:47 XSerpentX lame
00:47 rue_mohr so when its off, you get noise, and when its on you dont
00:47 XSerpentX but for a fact
00:47 XSerpentX oh
00:47 rue_mohr so, you want to use FSK, which will help
00:47 XSerpentX i heard u for RF u should put a signal at least 200ms
00:47 rue_mohr cause the transmitter is on 'all the time'
00:48 rue_mohr did you say it has a carrier detect and an RX?
00:48 rue_mohr onteh rf reciever?
00:48 XSerpentX um
00:48 XSerpentX no
00:49 XSerpentX are u talking about valid transmission?
00:49 XSerpentX the pin
00:49 rue_mohr duno
00:49 XSerpentX no
00:49 rue_mohr sounded like you said it has a carrier detect pin
00:49 XSerpentX they recomend u hook it up to a encoder/decoder IC set
00:49 XSerpentX to help with the noise and such
00:49 rue_mohr yes
00:49 rue_mohr want to know how to do FSK easy?
00:50 XSerpentX does it start with buying a FSK IC set
00:50 rue_mohr no
00:50 XSerpentX u mentioned a 555 timer
00:50 XSerpentX and a 74..
00:50 rue_mohr a 555 can encode the data
00:50 XSerpentX 749
00:50 rue_mohr and, the arduino CAN decode it
00:50 rue_mohr or use a LM567, which are a bit trickey
00:51 XSerpentX ok, is that easier then just buying the HT12E and D IC's?
00:51 XSerpentX which are 1.25$
00:51 XSerpentX now for the record
00:52 XSerpentX i can recieve signals even thrue the noise
00:52 rue_mohr the only problem with using the ardiono is that you have to ... oh wait, heh, you COULD use an interrupt to decode the serial and feed it back to the uart via an io pin, hah
00:52 rue_mohr its up to you
00:52 XSerpentX like i would like a perfect connection
00:52 rue_mohr yup
00:53 rue_mohr you can use someones chip, or arduino code
00:53 rue_mohr sorry
00:53 rue_mohr mic
00:53 rue_mohr the fire alarm is reminding me about supper agian
00:54 XSerpentX i don't know about bringing a regular i/o pin into rs232
00:54 rue_mohr you can use someones chip, or microcontroller code
00:54 XSerpentX i kinda tried this and it was kinda messy
00:54 rue_mohr XSerpentX, think of this
00:55 rue_mohr you take the rf module to an io pin thats on a counter in the chip...
00:55 rue_mohr you have a timed interrupt check the count of the counter and reset it
00:56 rue_mohr if its between a and b you ouput a 0 to a pin if its between b and c you ouput a 1 to the pin
00:56 rue_mohr "the pin" is jumped to the serial rx line ON THE SAME CONTROLLER!
00:56 XSerpentX right
00:56 rue_mohr the hardware on that pin decodes the serial data and it all looks like a perfectly normal serial connection
00:57 jadew are there any components that do exact current limiting? as far as I can tell, I can't rely much on a transistor, cuz I'm not sure what kind of current it will allow
00:57 rue_mohr for the transmitting side, you just make a 555 oscillator with a resistor connected to the CV pin that you put the serial in, the CV line going high/low causes the 555 to change freq
00:58 jadew with hfe 60-160, it can be anything
00:59 rue_mohr http://knol.google.com/k/-/-/1f4zs8p9zgq0e/wwzw6z/current-source-5.jpg
00:59 XSerpentX hey rue
00:59 rue_mohr to make a fixed current, you apply a fixed voltage across a fixed resistance
00:59 XSerpentX if i plug this ttlout into my netduino
00:59 XSerpentX will she blow
00:59 jadew thanks, but wouldn't that suffer from the same thing?
01:00 XSerpentX like direct
01:00 XSerpentX from pc rs232 to max232 to ttlout to netduino RX in
01:00 jadew hold on, let me see if I can make sense of the schematics
01:00 rue_mohr XSerpentX, use a series 470ohm resistor
01:00 rue_mohr jadew, the zener is a fixed voltage
01:00 rue_mohr jadew, the 68 ohm is a fixed resistnace
01:01 rue_mohr jadew, therefore, the votlage across the 68 ohm resistor is fixed
01:01 rue_mohr therefore there is a set current thru the 68 ohm resistor
01:01 rue_mohr the collector current and the emitter current of the transistor are 'the same'
01:02 rue_mohr so that means there is a fixed current on the load, nomatter what its resistance is
01:02 rue_mohr (provided its within the voltage limits of the circuit)
01:02 rue_mohr XSerpentX, get my answer in there?
01:02 jadew I see
01:04 XSerpentX ok
01:04 XSerpentX so that worked
01:04 XSerpentX so that res
01:04 XSerpentX dropped it down to 3.3v right
01:04 XSerpentX it works rue
01:04 XSerpentX after ...4 hours
01:04 XSerpentX it WORKS >:E
01:04 rue_mohr it limits the current so that any protection circuit isn't fried
01:04 rue_mohr :)
01:05 XSerpentX ok so next
01:05 XSerpentX i'm genna run ith thrue the RF
01:05 rue_mohr 555 and some software?
01:05 XSerpentX no
01:05 rue_mohr heh
01:05 XSerpentX just straight rs232
01:05 XSerpentX from pc
01:05 XSerpentX to max
01:05 XSerpentX to netduino RX
01:06 XSerpentX oh shit sone
01:06 e_mohr looks at the reverse engineered RC-car circuit and scratches his
01:06 XSerpentX shit son shit
01:07 XSerpentX so i just want u to know
01:07 XSerpentX i am going to take over the world
01:07 rue_mohr I still dont get how the freq sampler works
01:07 rue_mohr XSerpentX, yes, but long after ME!
01:07 rue_mohr ahahhahahahahaha
01:07 XSerpentX i should let u remote in
01:07 XSerpentX and i'll set up a webcam
01:07 XSerpentX so u can see this work
01:08 XSerpentX it's awesome
01:10 rue_mohr :)
01:12 XSerpentX man
01:12 rue_mohr isn't it great when it works?
01:12 XSerpentX there is nothing cooler then controlling a pan/tilt kit from ur mouse
01:12 XSerpentX ya
01:12 XSerpentX but that mirrored thing
01:12 XSerpentX like...seriously
01:13 rue_mohr I HAVE to try that feedback trick with the serial, thats such a coool idea
01:13 XSerpentX brb i gotta go show my gf
01:14 rue_mohr haha good luck
01:14 XSerpentX she'll totally not be interested
01:14 XSerpentX but still
01:18 rue_mohr ok I think I seee
01:18 rue_mohr a high pass filter, a buffer...
01:19 rue_mohr maybe a low pass...
01:23 XSerpentX she says good job
01:24 XSerpentX and that it's time for bed
01:24 rue_mohr she likes novels and stories about traveling across sea
01:24 rue_mohr ;)
01:24 XSerpentX ya..and friggan Edward Collins
01:25 rue_mohr ask her about the story she's reading
01:25 rue_mohr maybe she will return the fav and ask what the things are stuck in the holes
01:25 XSerpentX well, i usually show her stuff i do
01:26 XSerpentX i kinda stopped after the 5th time she came down
01:26 XSerpentX and sh'es like "WHOAALLY SHIT IT's BLINKING"
01:26 XSerpentX i had one netduino talk to the other and count binary on it
01:27 XSerpentX so lesson learned, counting in binary is not the way to a womens heart
01:27 XSerpentX :)
01:27 XSerpentX night rue
01:28 rue_mohr :) night
03:17 rue_shop2 "I'll take 'crystal oscillators' for 4Mhz Alex"
03:33 rue_shop2 wow dos 6.22 boots FAST on a 1.2G machine with 640M of ram
03:35 rue_shop2 faster even than linux off a 512M SDD
03:36 rue_shop2 ok as its 1:30am I'm going to bed
04:12 rue_mohr 2 noow
04:23 rue_mohr hmm what can I make an 8085 do thats usefull
05:46 robko01 hi every one did some one use ROS (ros.org)
10:56 rue_mohr robko01, what?
11:11 robko01 did someone use ROS (http://ros.org)
11:12 robko01 robotics OS
11:13 Tom_itx rue_mohr did you fix the rs232 dilemma yesterday?
11:13 Tom_itx and wtf are we doing in class today?
11:16 rue_mohr robko01, nobody uses operating systems for microcontroller robots :)
11:17 rue_mohr you just write the program and it goes
11:17 rue_mohr Tom_itx, after he found pin 1 on the db9 it all fell togethor really quick
11:17 rue_mohr class depends on who the heck shows up
11:18 rue_mohr the arm is an ongoing project
11:18 rue_mohr there is stuff to take apart
11:18 rue_mohr and I have a few robots ready for some programming
11:19 Tom_itx cool, i'll pack a sack lunch and be up in a jiffy
11:19 rue_mohr :)
11:19 rue_mohr bring the lathe
11:19 Tom_itx hah
11:19 Tom_itx you might retract that if you saw how old it was
11:19 rue_mohr no
11:20 Tom_itx it still turns semi round parts though
11:20 rue_mohr I"m used to having to fix tools before I can use them
11:22 rue_mohr hey do you have a circuit simulator?
11:23 rue_mohr I thought I had one and I cant remember the name of it
11:27 robko01 rue_mohr, i thought that if u are robotisits then u must know ROS
11:27 rue_mohr I use Linux on my robots
11:27 rue_mohr lots of software available
11:33 robko01 so ROS is meta OS for Ubuntu
11:34 robko01 it is runing on Panda Board and Beagle Board
11:39 Tom_itx rue_mohr, no just what comes with national etc for switchers
12:07 rue_shop2 I really like these robot computers I set up that boot in sub 5 seconds
12:08 rue_mohr 9.143
15:14 rue_mohr fly is just as vulgar as ever
15:27 rue_mohr !time
15:27 tobbor My watch says its 13:24 Sat Feb 11 2012
15:27 Wulong !date
15:27 rue_mohr today
15:29 jadew http://dumb.ro/toolbox/time can do today, yestearday, today + 2 days, etc
15:30 jadew next week 01:00
15:30 rue_mohr if I'm gonna finish my cnc I need to go buy a drill bit
15:31 rue_mohr I need a twist drill larger than 1/2"
15:31 peepsalot rue_mohr, what did you mean about "2x the thread size"?
15:31 rue_mohr is the screw is 1/4" thick I'd use a 1/2" thick disk
15:32 peepsalot ok
15:33 rue_mohr then you just use prethread rod for the leadscew
15:34 peepsalot right
15:34 peepsalot well, in my case i think i will try to thread a stepper motor shaft directly
15:35 peepsalot to keep it compact
15:36 rue_mohr what you making?
15:36 peepsalot rue_mohr, i'd like to make a worm gear based filament extruder for a reprap 3d printer
15:36 rue_mohr oh cool!
15:37 rue_mohr I'm prolly gonna make a head for my new cnc machine
15:37 rue_mohr as it runs g-code anyhow
15:38 Tom_itx rue_mohr it does?
15:38 peepsalot rue_mohr, most reprap people use one like this: http://www.youtube.com/watch?v=8phnxLaNbW0&list=UUX3D0b7Y5kIUz_OQnq5nouA&index=1&feature=plcp
15:38 Tom_itx where did you get a controller that did that?
15:39 rue_mohr all reprap stuff
15:39 peepsalot rue_mohr, RAMPS?
15:39 rue_mohr ramps?
15:40 Tom_itx rue_mohr you should get one of those arm discovery boards
15:40 rue_mohr free?
15:40 peepsalot that's the electronics that a lot of repraps use
15:40 Tom_itx they want me to design a daughter board for it
15:40 Tom_itx not free for you
15:40 Tom_itx sorry to say
15:40 rue_mohr I'm building my own, I'm using DC motors on the new one
15:40 Tom_itx steffanx just got a couple
15:40 Tom_itx dc would be faster yes
15:41 Tom_itx i'd like to do that
15:41 rue_mohr yep
15:41 rue_mohr use my servo code
15:41 Tom_itx i just got new steppers for mine though
15:41 Tom_itx more torque than what i had
15:41 Tom_itx it was a good improvement
15:42 rue_mohr still slow I bet... :)
15:42 Tom_itx better than it was
15:42 Tom_itx quite a bit actually
15:42 rue_mohr I love the copyright infringement capabilities of reprap
15:42 rue_mohr like making legos
15:43 rue_mohr Tom_itx, yes
15:43 Tom_itx maxbots makes a nice reprap
15:43 Tom_itx google mendlemax
15:43 Tom_itx it's an A frame
15:44 rue_mohr no when I saw they use Gcode I decided to just use my new cnc
15:44 rue_mohr I want to get the 3/4" drill for that today
15:44 rue_mohr meaning I have to do it now
15:44 Tom_itx i'm gonna go out for a bit
15:44 Tom_itx bak in maybe an hr
15:45 Tom_itx they are starting to interest me but i'm not sure i'll build one
15:45 Tom_itx i have 3 steppers i could use on it easily
15:46 Tom_itx nema23
15:46 Tom_itx the ones i took off my sherline would be more than adequate
15:46 Tom_itx although i'm not sure if they'd be fast enough
15:46 Tom_itx i suppose you could step up the ratio on one of those since there's little load on the table
15:47 Tom_itx bbl
15:55 peepsalot there's #reprap and #mendelmax channels on here btw if you guys are interested
16:20 rue_shop2 not yet
16:20 rue_shop2 but I'd like to show them how lego makes assembly instructions
16:20 rue_shop2 ;)
16:21 rue_shop2 ok I am the proud new owner of a 5/8" and 3/4" twist drill set
16:21 rue_shop2 $30 later
16:21 rue_shop2 so now I can drill the hole to finish the machein!
16:51 rue_shop2 I fail to understand how these things happen
16:51 rue_shop2 I went to get a screwdriver and next thing I know I'd built an FSK modulator
16:51 rue_shop2 I dont know what screwdriver I was even going for
16:52 e_shop2 plays with the FSK modul
16:52 rue_shop2 2400 baud
16:52 rue_shop2 240 bytes/sec
16:53 rue_shop2 2.4Khz
16:53 rue_shop2 hmm
16:53 rue_shop2 I dont need much play in the freq
16:53 rue_shop2 I could prolly go 4 bit
16:54 rue_shop2 so if 8 is the breking point
16:54 rue_shop2 0-8 8-15
16:55 rue_shop2 so 12 is a good center count for a high
16:55 rue_shop2 and 4 is a good centerpoint for a low
16:55 rue_shop2 12 *2400
16:55 rue_shop2 so I want 28Khz high freq
16:55 rue_shop2 ok
16:58 SolarNRG Can you see any use in microwave smelting aluminium cans into gears?
17:02 SolarNRG Please have a look and tell me what you think: www.youtube.com/watch?v=-44TOyzI4ic
17:05 Steffanx Nice SolarNRG
17:06 SolarNRG There's a recipe here: http://home.c2i.net/metaphor/mvpage.html
17:06 SolarNRG I've asked #chemistry they say refractory cement and ground up magnetite would work as a cruicible!
17:06 Steffanx Just get yourself a shitload of aluminium foil?
17:06 SolarNRG Make sure you tape up the air holes in the microwave
17:06 SolarNRG Bean cans!
17:06 SolarNRG Beer cans
17:06 SolarNRG Coke Cans
17:06 Steffanx Without the paint?
17:06 SolarNRG Go out on recycling day and get them
17:06 SolarNRG what paint?
17:07 SolarNRG On the cans?
17:07 Steffanx My coke cans don't get red by itself..
17:07 SolarNRG Sandpaper!
17:07 SolarNRG Easy
17:08 Steffanx I want to see him make something useful
17:08 SolarNRG I just thought if you had a robot that could collect recycling bins (uniform size) and another microwave bot that puts cans in, pours molten aluminium out and a load of molds on a conveyor belt you'd have a free factory
17:09 SolarNRG I thought gears would be good
17:09 SolarNRG gearbox shells maybe
17:09 SolarNRG aircraft parts?
17:09 SolarNRG Tubes
17:10 Steffanx lol :P
17:10 Steffanx @ robots
17:11 SolarNRG It'd be a self sufficient robot hive. The more bean cans they collect, the more robots there are
17:11 SolarNRG And on estates where alcoholism is rife, they would thrive!
17:12 Steffanx Here beer cans get recycled anyway.. so that robot would be useless here :)
17:12 Steffanx *coke canes too etc.
17:16 SolarNRG Yes but you send the robots out on recycling night before the bin men get to the recycling bins
17:16 Steffanx Yeah :P
17:17 Steffanx It's called .. stealing
17:17 SolarNRG Not from an unguarded, unlocked bin it isn't
17:17 SolarNRG And robots are beyond the remit of the law
17:17 SolarNRG A robot has not yet been charged with a crime
17:18 Steffanx True, but robots are CONTROLLED by someone, so .. no won't work
17:19 SolarNRG It all breaks down however if some drunken man walking home late night sees a robot with two webcams, an aerial and a box of beer cans driving up the pavement decides to kick the thing to bits because he's high on ketamine and thinks the robot is an alien invader
17:19 SolarNRG Hypothetically, do you think if the town was swarming with robot beercanstealer, eventually the police would follow one back to my back yard?
17:19 Steffanx You are also on beer and ketamine isn't it?
17:19 Steffanx aren't you
17:19 SolarNRG I stopped doing Ketamine a long time ago
17:19 SolarNRG Regretamine
17:22 Steffanx Oh, i read about that in a comment on that video about that solar tracker :P
17:22 SolarNRG Yeah
17:23 SolarNRG which one?
17:23 Steffanx http://www.youtube.com/watch?v=CReRQb_UZj0 that one?
17:23 SolarNRG Yeah, pain isn't it?
17:24 Steffanx I've no idea. I'm not into stuff like that
17:24 rue_shop2 hard drives, lawnmowers, alot of stuff is made of aluminu
17:24 rue_shop2 !assist images
17:24 tobbor Possibly http://eds.dyndns.org/~ircjunk/images
17:25 rue_shop2 http://eds.dyndns.org/~ircjunk/projects/smelter/p1020002.jpg
17:25 rue_shop2 http://eds.dyndns.org/~ircjunk/projects/smelter/p1020016.jpg
17:25 rue_shop2 mileage may varry
17:26 Steffanx And what's that?
17:26 rue_shop2 my aluminum smelter
17:26 Steffanx Something for on your wall?
17:26 rue_shop2 and a sprocket I treied to cast
17:26 Steffanx A clock?
17:26 rue_shop2 its a special sprocket for track made of hinges
17:27 Steffanx And I guess it worked very well
17:27 rue_shop2 hah that was one of the first tries, other stuff I did came out way better
17:28 SolarNRG That's really good rue!
17:29 SolarNRG I was thinking about trying the microwave method
17:29 Steffanx What did you use to get the shape right rue_shop2 ?
17:30 Steffanx plaster mould or what ever it's called?
17:31 SolarNRG I thought refractory cement would be better
17:31 rue_shop2 http://eds.dyndns.org/~ircjunk/projects/smelter/p1020009.jpg
17:31 rue_shop2 http://eds.dyndns.org/~ircjunk/projects/smelter/p1020010.jpg
17:31 rue_shop2 http://eds.dyndns.org/~ircjunk/projects/smelter/p1020013.jpg
17:32 rue_shop2 packed around with sand, the metal burns out the foam as is goes in
17:32 Steffanx Just.. sand?
17:32 rue_shop2 proper casting sand would be awesome
17:33 SolarNRG Any tips on smelting aluminium techniques?
17:34 moriarty why would you want to do that, when you can just buy?
17:34 rue_shop2 if you make a stainless crucible, carefull, the oxides on the top eat stainless
17:34 Steffanx I think i'll prefer a good 3d printer
17:34 moriarty there's an excess capacity at the moment
17:34 rue_shop2 buy what?
17:34 rue_shop2 sprockets for track made of door hinges?
17:34 rue_shop2 where do you buy that?
17:35 Steffanx In rue's shop2
17:35 SolarNRG How could you 3d print aluminium? It oxidizes, you've got to keep a lid or a layer of slag on top to stop it catching fire
17:35 Steffanx No, no aluminium :P
17:35 rue_shop2 the preference to just buy things helps move industry to china
17:35 rue_shop2 aluminum wont catch fire
17:35 SolarNRG Just buying stuff from China will be the death of us all
17:35 SolarNRG ??
17:36 Steffanx Yep, incl. the chinese themself
17:36 Steffanx ves
17:36 moriarty speaking of china...
17:37 moriarty http://www.innovationnewsdaily.com/images/i/1031/i02/ipad-value-distribution-120119d-02.jpg?1327015583
17:37 moriarty i'm reminded of this :-)
17:37 SolarNRG Can I pour a little bit of molten aluminium into a mold then wait 10 minutes then pour a little bit more or would that make the cast really weak?
17:37 SolarNRG Do I have to melt enough aluminium all in one go to make the complete cast
17:37 rue_shop2 you cant multi-pour, they wont stick togethor
17:38 SolarNRG So if I wanted to cast 155mm gears, I would need to smelt more than enough aluminium in one go to do that
17:38 SolarNRG ??
17:38 Steffanx Yes, that's what he said
17:38 rue_shop2 yup
17:39 Steffanx but … in the video the guy doesn't do it 'in on go' either
17:40 Steffanx moriarty .. can't blame apple :P
17:40 Steffanx You would've done the same
17:42 SolarNRG If you can't fit enough bean cans into the crucible in one go, can you melt a bit, keep it molten then just keep adding bean cans until you have enough?
17:44 SolarNRG Would that work?
17:44 Steffanx rue_shop2 is the expert :)
17:44 Steffanx I'm gone, good night
17:45 SolarNRG Night steffanx
18:23 m_itx pulls up a c
18:24 Solaris Maybe you should design a robot to push that chair in for you to save you the brain and body poweR?
20:04 XSerpentX i can't get my main engine to turn over
20:04 XSerpentX it's a larger DC motor
20:04 XSerpentX probably either 5.6v or 7.2
20:05 XSerpentX when i try to activate it, my whole circuit goes dead
20:07 Tom_itx don't power it from the same circuit
20:08 XSerpentX it's causing like induction right
20:08 Tom_itx batteries?
20:08 XSerpentX the dc motor
20:08 XSerpentX like noise and such
20:08 Tom_itx maybe
20:09 XSerpentX i wanna make a battery back
20:09 Tom_itx add some semi large caps
20:09 XSerpentX what i'm thinking
20:09 XSerpentX is i should have 8 AA's
20:10 XSerpentX 4 in series with the other 4
20:10 XSerpentX so to make 6V
20:10 XSerpentX and however much mA that makes
20:10 XSerpentX then have a 9v power my electornics
20:10 XSerpentX and voltage regulate it
20:10 XSerpentX for the 5v compoenents
20:11 XSerpentX and have my motor controllers source power from the 6v pack
20:11 XSerpentX my servo's say they only want 5.5v max tho
20:12 XSerpentX but i'm thinking with all the other motor draw..they should be ok?
20:12 XSerpentX i bet the AA's won't measure 6v anyways
20:12 XSerpentX maybe 5.85v
20:13 XSerpentX what i'm worried about is my motor controller can only handle 1.2A
20:13 XSerpentX i'm thinking my dc motor needs more
20:14 Tom_itx you measure stall current and build for that
20:14 XSerpentX hmm
20:14 XSerpentX how do i do that
20:15 XSerpentX i need a variable current somehow?
20:15 XSerpentX and then see when the motor turns?
20:15 Tom_itx stall the motor with an ammeter hooked to it
20:15 rue_mohr so I think I'm fine to play with making rf gear for 33.33Mhz, 40Mhz, and 100Mhz
20:15 rue_mohr which is awefull convenient
20:15 rue_mohr cause it just happens...
20:16 XSerpentX cool
20:16 XSerpentX uhh so Tom, how do you mean make the motor stall
20:16 XSerpentX use resisters?
20:17 XSerpentX when i put it directly on the power supply
20:17 XSerpentX at 5v
20:17 Tom_itx either find a data sheet on it or stall it
20:17 XSerpentX so continually lower the current until it stalls?
20:17 XSerpentX via resisters?
20:18 XSerpentX or a pot?
20:19 Tom_itx put the shaft in a vise and apply voltage to it with an ammeter hooked to the circuit. measure the stall current before you burn up the motor. it's kinda tricky
20:19 XSerpentX oh
20:20 XSerpentX ok, what will the stall current tell me
20:20 XSerpentX it's max current requirement?
20:21 Tom_itx basically yes
20:21 XSerpentX ok
20:21 Tom_itx if your stall current is 1A and your motor driver is designed for 1.2A it won't blow it up
20:22 Tom_itx you'd likely want fuses in the circuit anyway though
20:22 XSerpentX ok
20:22 XSerpentX ya i think i'm at the point i need to add supporting electronics
20:22 XSerpentX like large caps
20:22 XSerpentX fuses
20:23 XSerpentX well i think i'm screwed tho
20:23 XSerpentX well i need a bigger motor controller
20:23 XSerpentX cuz my current one, will not teven turn it
20:23 XSerpentX it does work on little ultra light dc motors tho
20:23 XSerpentX maybe i need more voltage..
20:24 XSerpentX the motor controller is rated for up to 50v
20:24 XSerpentX and i am only putting 5v thrue it
20:24 Tom_itx it likely has a minimum too
20:25 XSerpentX is it safe to hook up a AA battery to this dc motor straight?
20:25 Tom_itx i would imagine so
20:25 XSerpentX same with 9v too right
20:25 XSerpentX i can do some experiments
20:25 XSerpentX to see what makes it go
20:26 XSerpentX ok
20:26 Tom_itx 9v won't last long
20:26 XSerpentX safty glasses on
20:26 XSerpentX well i am planning on using
20:26 Tom_itx and keep track of how dead your batteries are
20:26 XSerpentX 8x AA's
20:26 XSerpentX they are all brand new
20:28 XSerpentX well
20:28 XSerpentX 9v turns it'
20:28 XSerpentX so 4 in parrall outta do it
20:28 XSerpentX well wait
20:29 XSerpentX i'm genna hook up the 9v as my motor controllers output supply
20:29 XSerpentX see if it turns according to my commands
20:41 XSerpentX hmm
20:41 XSerpentX this doesn't make much sense
20:41 XSerpentX according to the internet
20:41 XSerpentX 9v's put out about 300mA
20:42 XSerpentX and my 9v direct connection is able to turn the motors slowly
20:42 Tom_itx not for very long
20:42 XSerpentX right
20:42 XSerpentX so when i use the 9v
20:42 XSerpentX as the output supply on my motorcontroller
20:42 XSerpentX it can't spin it
20:43 XSerpentX my motor controller is rated for 1.3A
20:43 XSerpentX which should be more then this 9v can supply
20:50 XSerpentX i think what i gotta do
20:50 XSerpentX is i gotta do a 1 on 1 with this motor controller
20:50 XSerpentX i'm genna try a 12v load supply
20:51 XSerpentX completely separate circuit
20:51 XSerpentX see how it fares
21:13 rue_shop2 I learn the damndest tricks reverse engineering rc-car pcb's
21:45 rue_shop2 XSerpentX,
21:46 rue_shop2 my I been playing with OOK
21:46 rue_shop2 me and my scope just discovered something
21:46 rue_shop2 if the signal is idle for less than 3ms you dont get static cause the reciever dosn't unlock
21:50 eadthem rue_shop2 witch cars?
21:51 rue_shop2 which means, if you transmitt U when you are not transmitting anything else, the reciever may never unlock
21:51 rue_shop2 eadthem, 27Mhz
21:52 rue_shop2 random pile of junk
21:52 eadthem o transmitters
21:52 rue_shop2 I'm gonna try making a reciever for 33.33Mhz cause I have osc modules for that
21:52 rue_shop2 and I can OOK them with a 74LS00
21:52 rue_shop2 which I can FSK with a 555
21:53 rue_shop2 I can then use an avr to demodulate it and feed it back into its serial input for serial decoding
21:53 theBear yeah, i OOKed and FSK'd your mum last night !
21:53 theBear sorry, reflex
21:54 rue_shop2 pff
21:54 theBear i'm sure your mother is lovely rue, she bought up a nice boy
21:54 rue_shop2 do you have any rf modules?
21:54 theBear err, brought up?
21:54 rue_shop2 have any 33.33Mhz computer crystal oscs?
21:54 theBear not really, i got an old board from an rc car, but i been borrowing parts off it for over 15 years and lost the matching one
21:54 theBear i can probly make a osc like that if i HAVE to
21:55 rue_shop2 was it 27Mhz do you think
21:55 theBear ooh, not talking to me :)
21:55 rue_shop2 I think you over there might use odd freq's
21:55 rue_shop2 theBear,
21:55 rue_shop2 yea
21:55 theBear don't think you can use between about 25 and 40mhz here anymore
21:55 rue_shop2 in america its comms for various fast food shops
21:55 theBear they remind me of 'old' rc car crystals (when you just popped a new one in the back of the transmitter) and those vhf controllers are long banned/unusable here, from memory the dtv is what killed them
21:56 rue_shop2 or was it baby monitors
21:56 theBear whats name ?
21:56 rue_shop2 name?
21:57 rue_shop2 the way I see it, 20, 25, 33.33 40 50 80 100 266 Mhz are all computer noise
21:57 rue_shop2 }:)
21:57 rue_shop2 so I have one computer that happens to throw off 2W of noise! so!?
21:59 rue_shop2 ok I need to try to adjust the freq on this
21:59 rue_shop2 from 27 to 33 Mhz
21:59 rue_shop2 wonder if it'll go that far
22:03 rue_shop2 hah, almost too easy
22:03 rue_shop2 It almost hit the right freq as the ferrite lug unscerwed so much it fell out
22:06 rue_shop2 need an output amp
22:06 e_shop2 looks for an RF c
22:20 theBear there's a little birdhouse/cuckoo clock looking thing on the neighbors garden fence... apparently it makes the dog not bark, and sometimes when he goes crazy the lady adjusts it somehow and he calms down.... is it something as cruel and unusual as a loud-sound-activated-electronic-dog-whistle ?
22:25 Triffid_Hunter theBear: probably
22:25 theBear good god
22:26 theBear he was a fine dog, always goes quiet for me after the first time we met and had a chat, i mean, we're neighbors after all... thing is, being a big dog he's not real happy about being locked in a tiny yard alone all day, or being in a tiny yard while idiots pass by shrieking laughter like retarded cockatoos and don't even acknowledge him in his own front yard...
22:26 theBear big... MAYBE a rottweiller, maybe with a bit of something even floppier and bigger in tehre
22:29 Tom_itx rots are good dogs
22:44 theBear generally... i find most dogs are good if you aren't an asshole and/or idiot
22:45 zhanx evening
22:45 eadthem rue_mohr you can also use 72mhz
22:45 eadthem 54 is also popular iirc
22:45 eadthem well both popular for RC
22:45 eadthem these days most pepole are moving to 2.4Ghz
22:46 theBear heh, if rue does RC it must stand for Robot Control now :)
22:47 zhanx it does
22:49 theBear awesomeness !
22:49 theBear i'm finally back into RC !
22:49 theBear i was thinking just a couple days ago, my 'rc buddy' i used to work with has all these kickarse little cars and things, afaict he's only been out driving maybe 5 times in the 3 years i known him !
22:50 theBear but surely he has a secret double life
23:01 rue_shop2 yaaaay I have it retuned to 33.33Mhz!
23:01 rue_shop2 it was easy!
23:02 e_shop2 stands infront of and brushes away behind him a large pile of half rewound and destroyed rf c
23:10 rue_shop2 whats AM freq range...
23:12 Tom_itx 535 kilohertz to 1,700 kilohertz
23:13 rue_mohr ah, I'z thinking 54 to 160
23:13 rue_mohr er 540 to 1.6
23:14 rue_mohr so 700Khz is right in the AM band..
23:19 Tom_itx http://reboot.fcc.gov/spectrumdashboard/searchSpectrum.seam
23:21 Tom_itx that chart doesn't cover AM
23:30 XSerpentX back
23:30 rue_mohr I know what I'm doing but I dont know why
23:30 XSerpentX i had to go to a movie with the girls
23:30 XSerpentX that one with stupid radcliffe in it
23:30 rue_mohr why am I playing with rf reciever/tranmitter sets?
23:31 rue_mohr I think I know how to up the bandwidth of my reciever
23:31 XSerpentX so rue, about that 3ms
23:31 XSerpentX i read something like that too
23:31 XSerpentX basically, don't let ur shit idle
23:31 XSerpentX i read <500ms
23:32 rue_mohr k
23:32 XSerpentX i think it depends on your TX/RX set
23:32 rue_mohr your module is better than mine
23:32 rue_mohr so send repeated U when idle
23:32 XSerpentX right now i am transmitting at 50ms
23:32 rue_mohr I'm learing how to make the reciever/transmitters from scratch
23:33 XSerpentX oh..yeah
23:33 XSerpentX i been there
23:33 XSerpentX but..it's really tweaky
23:33 rue_mohr not really
23:33 rue_mohr I have a scope and freq gen
23:33 XSerpentX for $6 i'll just buy a tuned module
23:33 rue_mohr which is pretty important
23:33 rue_mohr 6!
23:33 rue_mohr huh
23:34 XSerpentX u got cheaper?
23:34 Tom_itx those rentron ones?
23:34 rue_mohr well my stuf is FREE
23:34 XSerpentX samples?
23:34 rue_mohr no I strip stuff and make it
23:34 XSerpentX oh yeah, i guess i could do more of that
23:34 XSerpentX i mainly just strip motors and gears from printers
23:35 rue_mohr I'm learning things...
23:35 XSerpentX IC's i get samples or buy
23:35 Tom_itx http://www.rentron.com/PicBasic/RemoteControl.htm
23:35 XSerpentX yeah, u gotta tune your pots
23:35 XSerpentX and use inductors
23:36 XSerpentX i'm a bit ashamed, but i am actually a graduated electronics engineer
23:36 XSerpentX but i've made my money in computers and servers
23:37 XSerpentX it's unfortunatly true what they say about school
23:37 rue_mohr a 74ls00 turns a 33.33Mhz osc module into an OOK generator
23:37 XSerpentX like algebra..the most math i do these days, is type my invoices :/
23:37 rue_mohr just designing a transmitter amp
23:38 XSerpentX that's cool
23:38 XSerpentX rue, what do you do for a living?
23:39 rue_mohr electrician
23:39 rue_mohr :)
23:39 XSerpentX cool
23:39 XSerpentX what city r u from
23:39 rue_mohr canada
23:39 XSerpentX city
23:39 Tom_itx rue's a country boy
23:39 XSerpentX grey county?
23:40 XSerpentX i'm assuming ontario
23:40 rue_mohr sechelt
23:40 rue_mohr is a name you can find on a map
23:40 XSerpentX oh bc
23:40 XSerpentX that means ur what 6 hours ahead of me
23:40 XSerpentX i'm from ontario
23:41 rue_mohr ah
23:41 rue_mohr so you spell colour properly
23:41 XSerpentX so shit man
23:41 XSerpentX i guess
23:41 rue_mohr and say roof correctly
23:41 XSerpentX i have issues with english and grammer
23:41 XSerpentX it's so flawed
23:41 rue_mohr english is a really scerwed up language
23:41 XSerpentX so i'm not so keen on pointing out grammerical or spelling mistakes
23:41 XSerpentX and they change it to whatever the fuck anyways
23:42 XSerpentX u know they added "lol" to the dictionary
23:42 XSerpentX i still do "alot"
23:42 XSerpentX they can suck my dick
23:42 XSerpentX the languages evolves on how people use it
23:42 rue_mohr uswe nice language tho ok?
23:43 XSerpentX ye
23:43 rue_mohr ok I'm gonna go make this band pass out of a 4069 to see if it really does work or if this datasheet is on acid
23:43 XSerpentX how do u get so many IC's
23:43 rue_mohr I take stuff apart
23:43 Tom_itx txtng will be added to the dictionary otherwise the coming generation will not have a clue
23:43 XSerpentX oh salvaging
23:44 rue_mohr and collect stuff from estate cleanouts
23:44 XSerpentX hmm
23:44 rue_mohr do YOU want a tube of z80's?
23:44 XSerpentX yeah, i got my gf to organise my resisters :)
23:44 XSerpentX in one of those slot things from canadian tire
23:44 rue_mohr "pretty" "ugly" :)
23:44 rue_mohr no, I jest
23:44 XSerpentX my girl is pretty
23:45 XSerpentX i'm lucky to have landed her
23:45 XSerpentX she has model friend too
23:45 XSerpentX that i get to hang out with
23:45 rue_mohr I'm starting to really consider giving up and dieing alone
23:45 XSerpentX ya love and relationships can be really messed up
23:45 rue_mohr what kinda idiot puts the capacitor there...
23:45 Tom_itx possibly not a bad idea
23:46 Tom_itx nobody is stupid enough to disclose the truth about relationships else the human race would become extinct
23:46 XSerpentX it depnds on what kinda person u are to rue
23:47 XSerpentX Family, Popularity, Romance, Knowledge, Money
23:47 XSerpentX i am Knowledge
23:47 XSerpentX and my secondary is Money
23:47 XSerpentX what about u guys
23:48 XSerpentX and Power
23:48 XSerpentX 6 kinds of people
23:49 XSerpentX i'd say, it seems you put alot of time and energy or talent points, into electronics and technology
23:49 Tom_itx knowledge is power
23:50 XSerpentX so hot girls put alot of time into their looks and popularity and romance
23:50 XSerpentX i find, the hottest girls are really geeks about makeup and looking good, and clothing and style
23:51 XSerpentX i find also, it starts with you
23:51 XSerpentX your going to have to make a concious attempt and allocate alot of skill points to things that will get you girls
23:52 XSerpentX just like you put effort into figuring out electronics
23:52 XSerpentX u need that same effort
23:52 XSerpentX and make yourself fit, healthy and work on your personality
23:53 XSerpentX now you should note, that I don't think there is anything wrong with your personality
23:53 XSerpentX but you'll have to develop a different one for girls
23:54 XSerpentX like how you deal with girls is different then how you deal with tech guys like us
23:54 XSerpentX it may take you a while to sort this out, much like how much time it took you to get this good at electronics
23:54 XSerpentX work on your fitness too if you a fatty
23:54 XSerpentX and take vitamins
23:55 XSerpentX try to be dynamic also
23:56 XSerpentX don't always be a lil bitch, show you care, be friendly, be romantic, but not always
23:56 XSerpentX sorta like how guys tend to like variaty in there chicks, girls like a lil interest or excitement in their guy so be interesting
23:57 XSerpentX but..not like bipolar or passive-aggressive
23:57 XSerpentX or wierd
23:57 Tom_itx are you profiling a robot?
23:58 XSerpentX lol i wish i could teach my robot to be passive-aggressive!
23:59 XSerpentX oh and rue, sometimes it's just the chicks in your city or area
23:59 XSerpentX sorta like how certain cities in north carolina develop a high level of racism