Electronic transformer for LV Halogen lamp in general use

[VISN]

Hi, I am in need of a 9V 1500ma power supply to replace the switchmode psu that came with my el Cheapo Android tablet PC, until a replacement arrives >3 weeks (amidst the Christmas rush as well).

Up to now I have limited my electronics dabblings to 12V 500ma and I have no transformers around that can provide 1500ma current. Well, apart from the Low voltage Halogen Electronic transformer that puts our 12V, 5A (and I think around 40 KHz ac). Please advise me if I can use these for general electronics work.

*
The other alternative supplies I have is a Laptop brick that provides 15V 3A and an old ATX PSU that was stripped of a working '486 PC. I also have a car adapter that provides variable voltage from 3-12V. I have on hand L200C, LM7809, LM317 regulators, TIP31A 2n3055 transistors lying around, as well as few of MC34063A.

 

[alec_t]

You're spoilt for choice!
If you can identify the potential divider resistors in the ATX PSU which control the feedback to the regulator chip then you can swap one for a pot/trimmer and crank the output volts from +12 down to +9. Heaps of amps available and no wasted power in an external regulator. A side effect is that the fan runs more quietly!