Instructables

Power Supply unit for arduino power and breadboard

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Step 6: Finished

Picture of Finished
you can open up the power supply unit 

 
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To anyone wants to make this, be very careful because these PSU have very hight wattage (400 W and more) and this could be lethal!
This is really interesting as know-how, but remember that a good switching psu from the Bay is very cheap, compact, and safe!
Side note, I think you mean Lethal at 400W, because of the high output of the +5V & +3.3V voltages could essentially fry the thin wires on the PC-Board in an instant (If shorting the supply.).. Or, are you referring to the working voltages of the primary input side? (the filter capacitors on the Input side usually have a working voltage of 200V-DC, so yes, THIS is Lethal too!) A good rule of thumb, ALWAYS allow the supply to sit for at least 10-15 Minutes, before opening. This should provide more than ample time for the input capacitors to discharged. (most supplies have a bleeder resistor across them.) These cannot be mistaken. they're the LARGE canisters and will say anything from 200WV to 240WV for the voltage.. Yes, this IS a serious warning! contact with the pins of these capacitors, unless they've discharged will literally kick you to the floor, and could possibly stop your heart if the voltage is allowed any path across the heart. (I.E. in one hand, to the other on the other arm.)
zeros762 years ago
Very good information, utile.


Thanks.