#robotics Logs

Jan 21 2020

12:10 AM hasioehrchen is now known as katsumi
02:51 AM rue_bed: I SO need sleep right now...
03:02 AM mrdata: so do i
03:03 AM mrdata: but i must drink some water; i'm too parched
03:03 AM mrdata: this will however cause delay
08:48 AM goppo: on delta robots, anyone know if the force due to weight of the base exerted on each rod is the same regardless of the position of the base?
10:49 AM deshipu: the base doesn't move?
11:25 AM kline: deshipu, im interpreting that as the delta bot being suspended and the "base" being the platform on which you put the end effector
11:28 AM deshipu: then the force is not the same
11:28 AM deshipu: it's proportional to the distance between the head and the column
11:29 AM deshipu: you can think about it as a lever
11:30 AM deshipu: --.----`-------------.--
11:30 AM deshipu: ^-- in this diagram, the force on the left support point will be greater than the one on the right one, assuming the force acts down at `
03:47 PM Jantz is now known as jantz
05:44 PM flyback: so rue_*.*
05:45 PM flyback: BMCC
05:45 PM flyback: SO anyways
05:45 PM flyback: my dad cut the phone wires going to the garage
05:45 PM flyback: cause just use wireless or cell
05:45 PM flyback: he ran then when he had to dug up the entire yard and run a power cable from house to garage almost 40 yrs ago
05:45 PM flyback: I told him not to cut it off completely
05:46 PM flyback: and I was going to reuse the 2 wires even though it's shitty 2 wire speaker shit
05:46 PM flyback: because it's still 2 wires between the house and garage
05:46 PM flyback: could carry data
05:46 PM flyback: one problem
05:46 PM flyback: read what I said
05:46 PM flyback: and notice the wire is unshielded
05:46 PM * flyback looks at the led dimly lit off the speaker cable just from induction
05:46 PM flyback: duah
05:47 PM Tom_L: dig it up and put in a 3" conduit
05:47 PM Tom_L: then you can put whatever you want in
05:48 PM flyback: not my house :)
05:48 PM flyback: it's just a sshame I was going to run i2c or sommething over it
05:52 PM veverak: hmmm
05:53 PM veverak: maybe rry so,e differential stuff?
05:53 PM veverak: try
06:20 PM logb0t_ is now known as logb0t
07:38 PM flyback: http://cowlark.com/fluxengine/index.html
07:38 PM flyback: love mine
07:38 PM flyback: well worth the $15 around total for each
08:38 PM flyback: Tom_L, given all the complex shit we deal with work and hobbies every day
08:38 PM flyback: I decided to make a crystal radio :)
08:38 PM flyback: doing a double one
08:39 PM flyback: first one generates enough current to power a 1 germanium transistor rf or audio amp
08:39 PM flyback: it's going to suck at my folks house
08:39 PM flyback: but I can get wdve at least
08:39 PM flyback: which is downtown
08:39 PM Tom_L: done that 2x
08:40 PM Tom_L: one as a kid and once for my kid
08:40 PM flyback: I didn't know you can do shortwave and even fm on them
08:40 PM flyback: you catch the edge of the fm signal it sounds like shit
08:40 PM flyback: but you can hear it
08:40 PM flyback: I forget how it works
08:40 PM flyback: neat thing
08:40 PM flyback: as a kid
08:40 PM flyback: I had absolutely 0 knowledge of how radio worked
08:40 PM flyback: or computers or electricity
08:41 PM flyback: I found by screwing around if I used a audio isolation transformer from my electronics lab
08:41 PM flyback: I could use normal headphones
08:41 PM flyback: recentely found out it's because it does impedience mathcing
08:41 PM Tom_L: i had a xtal earpiece
08:41 PM flyback: you can use a old mains transformer even
08:41 PM Tom_L: actually i had 3
08:41 PM Tom_L: come to think of it
08:42 PM flyback: these were 1/2 off yesterday
08:42 PM flyback: so I bought two
08:42 PM flyback: oh he kept the low price only raised it $2
08:42 PM flyback: http://www.bgmicro.com/CAP1420.aspx