#robotics Logs

Sep 11 2015

00:05 Kamondelious hmm, wrong window
00:23 theBear heh, why ? (yeah, right window, i guess)
00:24 rue_school I want to make learning state macines
00:26 Kamondelious Sounds fun
00:39 rue_school needs a feedback mechanism
00:39 rue_school pattern matching
00:39 rue_school hmmmm
00:41 rue_school so how do state machines work that can pick sequences out of garble
00:41 rue_school they can comprehend all possabilites at once
00:41 rue_school oh yea
00:42 rue_school so, can you make a self learning state machine that picks words out of a text stream?
00:42 theBear i can do that if i got enough psychadelics in the old blood juice
00:42 rue_school hmm
00:45 rue_school school is becomming concerning, one of the instructors is going odd
00:45 rue_school gnight!
00:46 theBear heh, are you one of the instructors, crying out for help ?
00:48 orlock Sooooo tired
00:48 orlock I had a thought with my microseconds wraparound issue
00:49 orlock time_till_step should always be higher than current_time
00:49 orlock Except, if current_time has wrapped around, in which case it will be lower
00:54 theBear err, it should ?
00:56 orlock hmm
00:57 orlock maybe
00:57 orlock argh too tired to think
02:09 rue_school haha, I'm thinking too much to get to sleep
02:09 rue_school should we trade?
02:29 adam789654123 ill put you to sleep
02:29 adam789654123 :p
02:34 rue_school adam789654123, no its just voltage drop
02:35 rue_school adam789654123, like an led, drops 1.4V when you put current thru it
02:35 rue_school right?
02:36 adam789654123 i was correlating that with the voltage drop of a resistor
02:36 adam789654123 im just going to take your word for it then
02:36 adam789654123 i thought that resistors are what caused voltage drop
02:36 adam789654123 i diddnt know anything else could
02:37 adam789654123 i thought that was the main reason for the usage of resistors
02:37 rue_school with semiconductors, votlage drop isn't about resistance, its just votage drop
02:37 adam789654123 that you see all those little resistors when you open up your tv remote control because of all the little voltage drops or voltage dividers
02:37 adam789654123 ok
02:37 adam789654123 i didnt get that far
02:37 adam789654123 :/
02:38 rue_school if you forward bias a normal diode, it will drop 0.7V
02:38 rue_school an led will be about 1.4
02:38 adam789654123 thats interesting though
02:38 adam789654123 ok
02:38 rue_school a revrese biased 5V zener will be about 5V
02:38 adam789654123 ok
02:38 adam789654123 i understand
02:38 adam789654123 voltage drop without the resistor
02:39 adam789654123 thats actually really useful then, no?
02:39 adam789654123 damn
02:39 rue_school yup
02:39 adam789654123 i remember reading about this stuff, and im like, too bad you have to waist all that energy to divide the voltage
02:39 rue_school you still need resistance to limit the current, just liek for an led
02:39 adam789654123 ok
02:41 adam789654123 so what about these exercises?
02:42 rue_school its comming up with good numbers now
02:42 rue_school kinda
02:44 adam789654123 so like, how, youll give everything but one value for them to calculate?
02:45 adam789654123 or maybe, you could give enerything but two values and find the ranges for those two values
02:45 rue_school no, this generates the whole problem you have to mask it yourself
02:45 rue_school ------------------------
02:45 rue_school Source voltage 34.00000
02:45 rue_school Series resistance 16.93441
02:45 rue_school Series voltage 16.40000
02:45 rue_school Series current 0.96844
02:45 rue_school Series power 15.8825
02:45 rue_school Zener voltage 17.6000
02:45 rue_school Zener current 0.8800
02:45 rue_school Zener power 15.4880
02:45 rue_school Load resistance 199.0000
02:45 rue_school Load current 0.0884
02:45 rue_school Load power 1.5566
02:45 rue_school ------------------------
02:45 adam789654123 damn.....
02:46 adam789654123 that looks like a hard problem
02:46 adam789654123 and you desing the circuit for that?
02:46 rue_school its all for the same circuit
02:46 rue_school its just a zener shunt regulator with a resistor load
02:46 adam789654123 the list specifies a state
02:46 adam789654123 what is the relevance to the problem?
02:46 Jak_o_Shadows I have a friend making a 220 Watt coil
02:47 Jak_o_Shadows Just to make a magnetic field for something he's doing
02:47 rue_school you have to hide some of the values and make the person find them
02:47 adam789654123 ahhhh
02:47 rue_school anyhow, I'm gonna try to sleep again
02:48 adam789654123 one more question
02:48 rue_school the answer is 42
02:48 rue_school the question is 6*7
02:48 adam789654123 apparently no one value can be changed without changing others?
02:48 rue_school yea, thats a whole problem, every value in the circuit
02:48 adam789654123 im just gonna give myself the answer yes
02:48 adam789654123 haha
02:48 adam789654123 ok
02:48 rue_school gnight!
02:48 adam789654123 have a great sleep
02:48 adam789654123 :D
02:51 Jak_o_Shadows I really hope most engineering educators use computer programs to figure out nice values for their problems
02:52 Jak_o_Shadows Those that arn't too lazy to make new questions
06:36 mrdata "nice values" are a give away
06:36 mrdata i use the ugliest, grittiest, least co-operative ones
06:37 mrdata if you dont know your significant figures, you are doomed
06:48 Jak_o_Shadows Nice values make for easier marking, and are you marking calculations, or are you marking an understanding of what's going on
08:35 rue_school just practise problems, no process
08:36 rue_school that one does use nice values, but there are always some that have to be ugly
08:36 rue_school my program rounds off a decimal places on the random numbers
08:36 rue_school ------------------------
08:36 rue_school Source voltage 10.00000
08:36 rue_school Series resistance 0.63417
08:36 rue_school Series voltage 1.30000
08:36 rue_school Series current 2.04991
08:36 rue_school Series power 2.6649
08:36 rue_school Zener voltage 8.7000
08:37 rue_school Zener current 2.0100
08:37 rue_school Zener power 17.4870
08:37 rue_school Load resistance 218.0000
08:37 rue_school Load current 0.0399
08:37 rue_school Load power 0.3472
08:37 rue_school ------------------------
08:37 rue_school so voltage is always to the volt, series voltage is only 1 place, zener voltage is just 1 place
08:44 rue_school or something
08:47 rue_school http://www.radio-electronics.com/info/power-management/linear-power-supply-psu/linear-regulator-shunt-zener-circuit-01.gif
08:47 rue_school thats the circuit for it
08:54 SpeedEvil was that a question?
13:48 deshipu innovation!!11!one! https://www.indiegogo.com/projects/erle-spider-the-ubuntu-drone-with-legs/#/story
13:52 elektrinis-hme again
14:04 deshipu let's take a cheap chinese hexapod kit, put a raspberry pi with open source OS and open srouce software on it, and sell it
15:26 wolfmanjm yea it is amazing what people will fall for :)