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 (nobody)...and 222 guests Last 5 registered Oplandisks nothingstar N_loop yipe foxtrotromeo Browse members... |
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Members 8025Messages 2613457 Today 3 Topics 127500 |
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Not sure if i posted this?I remember thinking about it: i just tested another PSU (one of those that powers a keyboard or controller or whatever. An external psu) just like so many before its dramatically over volting. the thing was supposed to give out 12v ...turns out to be 23v!! so if you have a volt meter , its worth checking your psu's , and changing for a regulated psu . all this will do is probably extend the life of your gear. Depends on whether the electronic device itself has a regulator inside. if not? its probably over heating. |
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even if the device has a regulator inside it's rather for filtering out peaks than applying excessive voltage for a long time. 23V is kind of hardcore. are you sure you measured it right ? |
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hello yes, mr sadist. i have a decent meter. its just a crap psu , i think it came from a modem , it is labelled 12v . almost double is insane and i had to post here incase someone has a nice midi keyboard plugged up with a crap psu. certainly worth checking. regulators are used to supply a specific vottage , capacitors are placed either side for smoothing. i've made a regulator box in the past that excepts a range of voltages on the input, and outputs only 9v , with 1000uf and .01 uf caps placed to smooth out the current. this particular psu must have been made as a gift for nside a christmas cracker, it istotal shi*e. |
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Regulators set the voltage to a certain level. Capacitors filter out ripples and variations of the voltage. Most cheap power supplies just have a transformer and diodes with filtering capacitor. This turns mains AC into filtered DC. The AC voltage can vary wildly. The transformer reduces it by a fixed amount, 10:1, etc. Therefore DC can vary. Without a regulator the DC output voltage is pretty unpredictable. A regulator uses its internal transistor "bandgap" voltage to accurately set the output voltage by comparing the output to the accurate reference and adjusting up/down as required, thus making it independent of the input voltage changes. It's worth checking these things, although 23V is probably unloaded. If you connect up a circuit the 23V will drop as current is being drawn. |
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once i got a studio 440 from US (110v) and the current voltage here is 220v, it blows up. |
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lol, that's along the lines, but yes . best to check mains compatibility also : ) i hope you fixed it? |
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