#robotics Logs

Oct 30 2018

12:47 PM mrdata-- is now known as mrdata_
02:25 PM patr0clus is now known as s3nd1v0g1us
05:45 PM patr0clus is now known as s3nd1v0g1us
07:39 PM rue_mohr: I need flood lights
07:39 PM rue_mohr: how much light can $1500 get me?
07:43 PM mrdata_: a lot
07:43 PM mrdata_: how many lumens do you need
07:44 PM mrdata_: LED lighting with very high numbers exist
08:09 PM rue_mohr: huh, wrong question
08:09 PM rue_mohr: it was supposed to be
08:09 PM rue_mohr: how much light can 1200w get me
08:10 PM rue_mohr: strange conceptual error
08:10 PM rue_mohr: what does it say about how the brain works
08:24 PM mrdata_: rue_mohr, on digikey you can to a search for LED lighting that has very high lumens per watt
08:24 PM rue_mohr: yup, and from china I can buy them for pennies a watt
08:24 PM rue_mohr: tho, most of the watts go into the dead dies...
08:28 PM SpeedEvil: You can get 1kW halogens for $1/tube.
08:28 PM mrdata_: i see them at > 200 lm/W
08:28 PM rue_mohr: hmm
08:29 PM SpeedEvil: So, 1.5MW or so of light, 21 million lumens.
08:29 PM SpeedEvil: Or the equivalent of a hundred kilowatts of LED.
08:29 PM rue_mohr: have to make sure to turn that one off over night
08:30 PM mrdata_: https://www.digikey.ca/product-detail/en/samsung-semiconductor-inc/SPMWHT541ML5XAR0S6/1510-2182-1-ND/6569493
08:32 PM rue_mohr: 2.75*0.2
08:32 PM rue_mohr: 0.5w ea
08:32 PM rue_mohr: say, 18V supply
08:33 PM rue_mohr: or, 19.5
08:33 PM mrdata_: each of these is 200 mA; at 212 lm/W, then to get 21 Mlm, you would need 100,000 of them... 19 kW
08:33 PM SpeedEvil: https://www.aliexpress.com/item/100W-150W-200W-Driverless-Smart-IC-Beads-Lamp-White-High-Power-COB-LED-Chips-AC-220V/32831882482.html - 100W for $12, so 12kW of LEDs, about 1.2Mlm
08:33 PM mrdata_: err, 20 kW
08:33 PM rue_mohr: 7s
08:33 PM rue_mohr: hmm
08:33 PM rue_mohr: say 40w
08:33 PM SpeedEvil: The above will only need wired to the mains.
08:33 PM rue_mohr: 11p
08:33 PM rue_mohr: 7s11p = 77 leds
08:34 PM SpeedEvil: But, will also overheat in 10s or so
08:34 PM rue_mohr: $23 for 40W led
08:35 PM rue_mohr: 8100 lm
08:36 PM rue_mohr: arg, my eyes are snapping shut and I'm hearing things,
08:36 PM rue_mohr: this dosn't lead to long spells of conciousness
08:36 PM SpeedEvil: rue_mohr: poultergeists.
08:37 PM rue_mohr: "This is my todo list, if your going to posses me, some of these things better well be done when your finished"
10:19 PM flav0r: whats up dudes
10:20 PM mrdata_: nm
10:20 PM flav0r: try harder !!
10:22 PM flav0r: i wonder how much this POS costa pple to make
10:22 PM flav0r: https://www.apple.com/shop/buy-ipad/ipad-pro
10:24 PM flav0r: dont worry for ONLY $200 you can add a keyboard cover
10:32 PM SpeedEvil is now known as Guest67105
10:33 PM patr0clus is now known as s3nd1v0g1us