Mga sisters, unless for the sake of leaning lang, mabubusi yan project. As I mentioned earlier, 12V max lang naman ang kailangan ng computer, plus and minus nga lang, why not use batteries all the way. if yo switch it, it will be only to get the diferrent voltages needed. At kung mahal bumili ng maraming batteries, eh, yung laptop na lang de batterya. yung fren ko, bumili sya ng inverter sa CDR King to charge the laptop pag na drain ang battery. sabi ni T.siopao, iwasan ng raw ang inverter dahil inefficient and of course gastos but to do what you want to do will be very costly in parts and in time nyo.
BK
^ strict requirements kasi sa regulation ang main problem sir. some products can tolerate the 13V+ ng batteries at full charge, pero 'yung iba merong overvoltage protection na hindi sumisindi kapag naka-detect ng 12.8V (12.6V 'yung maximum voltage sa specification ng ATX).
http://www.formfactors.org/developer/specs/ATX12V%20PSDG2.01.pdfmagastos din gawan ng regulator 'yung ibang voltages kung manggagaling sa battery. 5V requires at most 18A and 3.3V requires at most 17A sa 250W ATX. then meron pang -12V.
'yung experiment includes changing only the primary winding (malamang interleaved copper straps ang kailangan), and then changing FET's plus a lot of headache.
mukhang available na lahat sa bin 'yung components ni sis woots 'yung mga kailangan.
based on experience, ang mahirap sa low voltage high current SMPS design is heat management. dami kasing nagbabagong parasitics.
Table 2. DC Output Voltage Regulation
Output Range Min. Nom. Max. Unit
+12V1DC ±5% +11.40 +12.00 +12.60 Volts
+12V2DC (1) ±5% +11.40 +12.00 +12.60 Volts
+5VDC ±5% +4.75 +5.00 +5.25 Volts
+3.3VDC (2) ±5% +3.14 +3.30 +3.47 Volts
-12VDC ±10% -10.80 -12.00 -13.20 Volts
+5VSB ±5% +4.75 +5.00 +5.25 Volts
