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Phreedom Karess
Guest
cheap thing bought at dollar store, at home used used a wallwart 12vdc with a cig lighter style attach, worked fine for year, then i accidentally managed to short the 5vdc output during a quick kludge on a project. now this cheap little thing started putting out 7.6 vdc rather than 5vdc, unbeknownst to me. long story short, i then used it to try charge one of those 'recharge your cell phone' portable batterys. and it toasted it, no more blue light showing charge or redlight showing it is charging. of course, it would, wrong input voltage! dumb eh? i figured there would be some sort of minimal input protection on the battery thing, boy was i wrong. take this little cheap thing apart, inside is a fuse to protect (whatever?) itself from over load, a resistor, a small millihenry inductor and a 6 pin chip that does 'all the work'. (oh and a red l.e.d. to show the output is on). nothing looks remotely cooked or smelled like usual toasted electronics, must be all internally fused or opened? amazing how cheap it was built, gotta give them chinese credit, they know how to slap these things out by the millions and never give a dang about failure modes or protecting dumb end users! ;-))
best way to 'repair' these cheap little things is to go to the dollar store and get another one.
best way to 'repair' these cheap little things is to go to the dollar store and get another one.