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| Using PC Power supply for 7.5 volt power adapter |
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| DeLuSioNal29:
Hey all, I wanted to wire up my PC speakers directly to my PC's power supply. The power adapter for my PC speakers say "7.5v DC" on it. Do you think I can get away with wiring it up as 7v directly from the power supply? My thought is that I want them to turn on when my power supply comes on. DeLuSioNaL |
| ed12:
try it on your 5volt rail..not the 12v.. or open it up and see what the main filter cap is rated for,and if there is a regulator in there..7.5 is a odd voltage,but as a rule i would see it if it is going into a 5v reg. ed |
| DaOld Man:
12 volt + and 5 volt + (red and yellow wires) will give you 7 volts. I don't like doing this, but I have heard of others doing it. How much current do the speakers need? Switching to experimenters mode: Measure voltage from yellow to red, I think red yellow will be negative, but make sure, my head's a little fuzzy right now. Once you have polarity hammered, hook it up and try it. |
| lilshawn:
+5 red to NEG and +12 to POS gives 7 volts. the current carrying capability is that of the smallest current channel you are using IE: if you wanted 10 volts and you used the red +5 volt and the white -5 volt line (to get 10 volts) the +5 volt line is capable of delivering 60 amps, but the -5 volt line is only capable of delivering 175 milliamps, your 10 volt "line" you created is only capable of driving 175 milliamps. handy dandy chart...print that sucker out: |
| ed12:
which both ideas are perfect expcet 1 little thing u CANNOT USE THAT SAME POWER SUPPLY TO POWER THE TOWER gee i wonder why u say..??? hmm 12v 5 volt..your carzy ed..welp think again that pesky little thing called common ground... biacth as it is... ed |
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