#qi-hardware IRC log for Thursday, 2016-10-27

arossdotmedont supose anyone knows anything about the dps-700GB A server power supply. the info i had for pin out seams to.. well not work. my current plan is to get a diff one and sell on this one unless someone happens to know the magic needed :)00:08
arossdotmei yet 2.*v and 3.*v out on 2 pins so i guess it sorta works. theres a dent in it on the bottem00:09
arossdotmeunless it was sold faulty to me :( idk00:09
arossdotmefor 12v mainly 500w+ power supplys 2rd hand server power supplys are really cheap! £10-20 compared to nice, know to work, low noise meanwell brand psus00:11
arossdotmewhich cost £100+ new and hard to get 2rd hand00:11
DocScrutinizer0524V is a real 30V like 12V is a real 15V11:16
DocScrutinizer05>>Typical (daily) charging: 2.282.4 V (depending on temperature and manufacturer's recommendation)<< https://en.wikipedia.org/wiki/Leadacid_battery#Voltages_for_common_usages11:29
DocScrutinizer05that's 2.4V * 611:29
DocScrutinizer05= 14.411:29
eintopfI thought 12 V battery would be 12 V11:30
DocScrutinizer05widespread misconception11:31
eintopfand such tolerance also applied to notebook batteries?11:32
DocScrutinizer05notbook battery are LiIon cells which have a usual top voltage of 4V1 or 4V2 and a discharge end voltage of 3V5 or even 3V011:33
DocScrutinizer05do your math11:34
DocScrutinizer05they are even *labeled* sometimes 3V7 and sometimes 4V1 or 4V211:34
DocScrutinizer053V7 is more honest thaan 4x11:35
DocScrutinizer05NiMgCo? (the most usual chemistry) has a nominal 3.7V and max 4.2V, for the (new) LiFeP the voltage from cell chemistry is different11:46
DocScrutinizer05arossdotme: huh? BMS? dps-700? no idea what you're talking about11:50
arossdotmesorry BMS =battery protection circuit11:50
arossdotmedps-700 was a model of computer server PSU11:51
DocScrutinizer05and what was your question abozut that dps-700?11:55
arossdotmeDocScrutinizer05, thx for the link, prev tried that wiring. no success... wonder it was DOA or if i fried it trying :/14:07
arossdotmehmm i guess ill try again but with a load resistor connected to 12v pwr out14:07
DocScrutinizer05add a load incandecent lamp from your car ;-)14:09
DocScrutinizer05like that 50W front lamp14:10
DocScrutinizer05it makes for a at least semi-decent load14:10
arossdotmeoh btw got a nice 100w led https://www.aliexpress.com/item/2016-NEW-10pcs-Cree-Xlamp-XP-G3-Series-XPG3-S4-LED-Chips-LEDs-Diode-Cool-White/32702230953.html14:11
DocScrutinizer05wut 100W??14:11
arossdotmei think its one of the most efficient currently around14:11
DocScrutinizer05wow, mad14:11
arossdotmereally bright14:11
arossdotmesun glasses are a must XD14:12
arossdotmeif you put plastic in front of it it 1-3cm then it melts or paper burns14:12
DocScrutinizer05100W cooper PCB (SIC!)14:12
arossdotmegot a old cpu copper heatsink + fan14:13
arossdotmethe domes of the leds get too hot to touch14:13
arossdotmethe copper heatsink plate gets warm... just dont put fingers near the leds 14:19
arossdotmebtw with the DPS-700GB i assume the 12v "pins" are connected together and not separate rails?15:04
arossdotmefound out why i dont work, the bloody transformer is in peaces! was wondering why there was rattling inside!15:18
--- Fri Oct 28 201600:00

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