Post by Tom Maneiro on Apr 1, 2005 15:33:22 GMT -5
This remembers something that happened me with a friend this wednesday...
My friend got a Palm Vx from their brother, but he lost the sync/charger base. And the worse thing? The unit has their battery dead (no charge) We did a EXHAUSTIVE research in various points of the city for look that damn base, with no result ("Try searching on Internet, or in Caracas" -Venezuela capital city-, was the final answer on the last store where us checked). Searched on Intertnet... MercadoLibre has only full used systems. And eBay has the charger cable... too expensive!! ($17.99 plus S&H, that would added $20 to ship the thing to Venezuela).
Finally, we surfed the net for some Palm Vx pinouts, and found our answer... i took the charger from my Nokia cellphone (the ACP-7U outputs 3.7v, but Palm only needed 3.3), put the pin 2 on the Palm to positive, pin 10 (GND) to negative, and for our surprise, it worked! A cheapo charger made from a existing Nokia charger and some old IDE cables... god bless Nokia, all their phones uses the damn same old 3.7v lil' charger
After some testing, the unit works OK, i can transfer contacts and calendar notes between my Nokia 3320 and the Palm (any IR and vCard compilant device should work)... and Grafitti(r) is very easy! But my friend has a obscure idea to use their Palm: cheat on exams
EDIT: ACP-7U (the one that comes bundled with almost every Nokia phone since 199?) outputs 3.7v, ACP-8 (the quick charger) outputs 5.7V!
i have a compaq presario 1694 notebook, but no power adapter. ill probably have to go get one of those engineering sketch books from rat shack to make a power supply for it, because its some wierd ass voltage like 19.4 volts.
dont you love compaq and their gay "you can only get parts from us and not 3rd party vendors?" mindset?
take a look at their floppy drives, they use a oval button on the floppy drive with an oval hole in the case so you cant go out and buy a generic floppy drive incase the one in your computer breaks.
thats why i never buy manufacture based pcs, i build my own so that when i want to upgrade something, im not limited to what i can upgrade. want a new motherboard? go out and buy one. with them its like you get what you payed for. total and udder crap.
Last Edit: Apr 1, 2005 16:11:52 GMT -5 by GiGaBiTe
Post by oompa loompa on Apr 1, 2005 22:12:49 GMT -5
cheat on exams
dammit, you can get away with anything in venezuela =P. that's like bustin out a computer and using it as an aid =P
for the compaq laptop, you're not going to find an precision 19.4v power supply unless you make one and regulate it on your own. if i were you, i'd go use like a 16v supply. i tried this once on an ast alptop rated at 20v, but 12v still worked =D (the higher voltages would be for charging the battery, but the ic's and peripherals are always regulated)
you could have a 9v DC with 500 amps adapter, and it wouldnt blow your stuff out.
equipment only draws however many amperes that it needs. as long as the draw does not exceed the output of the transformer, your fine.
if it does exceed the output of the transformer, the tranformer will start generating more heat, and the componets will start to deteroriate. but if you can find some way to keep the transformer cool (ex: bucket of icewater) you can draw alot more amps than it was meant for and still have the transformer work properly. but thats not recommended, because you could cause a fire.
Post by oompa loompa on Apr 6, 2005 15:16:28 GMT -5
you can measure how much current your palm is drawing out by using a cheap multimeter. then, you can know for sure if you're drawing more current than the adapter puts out. but as long of the adapter doesn't melt, you're safe =D