I'm trying to find a source for high amperage low-voltage PSU for some experiments with thermoelectric cooling.
I was reading an old article on a ham-radio site that talks about wiring the +5 rail of three AT power supples (switching) in series to increase the voltage to +15vdc @ XX amps (whatever 5v was rated at)
Does this really work? I can't believe its not dangerous or something, since I can't find any examples of anyone doing it recently.
500 watt ATX (should be the same technology, just with a 3.3v rail?) is like $20 ... so three of those is $60 ... 15 volts, 38 amps, less than $100 sounds like quite a bargain.
of course, 15v is a bit high for most TEC's, would a parallel wired 'bank' of 7812's with heatsinks regulate that down to 12v?
I was reading an old article on a ham-radio site that talks about wiring the +5 rail of three AT power supples (switching) in series to increase the voltage to +15vdc @ XX amps (whatever 5v was rated at)
Does this really work? I can't believe its not dangerous or something, since I can't find any examples of anyone doing it recently.
500 watt ATX (should be the same technology, just with a 3.3v rail?) is like $20 ... so three of those is $60 ... 15 volts, 38 amps, less than $100 sounds like quite a bargain.
of course, 15v is a bit high for most TEC's, would a parallel wired 'bank' of 7812's with heatsinks regulate that down to 12v?