demonjester Posted February 1, 2013 Share Posted February 1, 2013 (edited) When I received my alfa router I was so excited to get a dc barrel to usb I spliced the dc barrel off, and made my own usb cable with it. My problem is I did this before flashing pineapple (was waiting on uart at the time) Will it be ok if I used the usb and hooked it into a ac adapter when I go to flash my router? Edited February 1, 2013 by demonjester Quote Link to comment Share on other sites More sharing options...
no42 Posted February 1, 2013 Share Posted February 1, 2013 USB to AC sounds bad! USB is typically 5 volts. AC is usually around 110v(us) 220-240v(europe) Guess it depends on your adapter's current (Amp-age) and output Voltage. I'd be very careful! Excessive voltage will cause breakdown and arcing, either between separate exposed contacts (especially little points of solder), or through an insulating or dielectric barrier (for example, the dielectric in a capacitor). Excessive current is generally caused by excessive voltage. Passive components have a specific, fixed resistance; the current through them is determined by Ohm's law, I = V/R. Excess current can cause overheating and burn-through of components, leading to open circuits. Quote Link to comment Share on other sites More sharing options...
demonjester Posted February 1, 2013 Author Share Posted February 1, 2013 well i mean i have usb to ac adapter that has a usb port on it. Quote Link to comment Share on other sites More sharing options...
no42 Posted February 1, 2013 Share Posted February 1, 2013 Unless you know its output volt-age and amp-age, I would advise against it. I have heard that people who have used the wrong adapters with the raspberry pi, and have ended up blowing their device. Your risk! Not mine. Quote Link to comment Share on other sites More sharing options...
telot Posted February 1, 2013 Share Posted February 1, 2013 Its easy to test with a voltmeter - pick one up at fleet farm/home depot for $10 and be sure :) Over amperage won't hurt a thing - the device will pull what it needs. If its a AC to USB adapter, it'll also be just fine, as its 5V. I'm not quite sure what the problem is here... telot Quote Link to comment Share on other sites More sharing options...
airman_dopey Posted February 2, 2013 Share Posted February 2, 2013 USB to AC sounds bad! USB is typically 5 volts. AC is usually around 110v(us) 220-240v(europe) Umm, regardless of voltage, USB is DC.... Quote Link to comment Share on other sites More sharing options...
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