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How to build a 24V Power Supply from 2 ATX PSU
Hi Fadi, Your 2 power supplies can be seen as a pair of 12 volt batteries when the DC ground is isolated. If one battery is a large car battery and the other one is a smaller motorcyclel battery you can only draw the amount of energy out that the smaller battery can provide. Even if you have 2 similar car batteries, one might be older or weaker than the other. The weaker battery will provide as much power as it can and no more. The extra capacity of the bigger battery (or PSU) counts for nothing when they are connected in series. Don't forget your power supply provides the power and the load takes what it needs - the power supply can never push extra power into a load and damage it. Please take care with the high voltage side of these power supples.Electricity only kills you once. J
I'm very interested in this design but there is one problem that I see with it: the parts of these psu were rated for a specific amount of Watts. By putting the second one in series, I'd be doubling the voltage and the overall wattage that's being loaded on it. These actually expensive psus I'm working with and I can't afford to blow one up. How does one go about verifying if the PSU can handle the doubled wattage?
Yeas, but even though the amperage stays the same, the total wattage is doubled b/c voltage is doubled, if at some point down the line he halfes the voltage with a resistor, he'll have double the amperage.
This is cool...! I was wondering...did you use a waterpump?
Why do you need 2 PSU when you can use only one. Just use +12V and -12V on P1 connector.
yup 3 psu for 36v .Remove earth conection on PSU B and PSU C.Change PSU C 12v rail caps from any 16v - 25v to 50V (2200mF) for example
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