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<stipa> have anyone moded 19V laptop/printer PSU to 5V ?
<stipa> the brick
<stipa> i have put 5V regulator 7805 but it heats like crazy, maybe modding the psu to 5V is a better approach
<stipa> i need it to power 2.5" hard disk
<stipa> that bugger eats more than 1.5 A
<stipa> i'll try but maybe some poor soul did it before me
<stipa> theoreticall it's changing the value of one resistor
<stipa> somewhere
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<ArmbianTwitter> @TvPrivacy (Privacy & Tech Tips): @itsfoss2 @debian Personal favorite #Debian based distros: #TailsOS (amnesiac #privacy!) #Whonix (Great for privacy/#anonymity) #Mint #Mobian (Linux for phones, such as #Pinephone!) #Armbian #Dietpi (got a SBC? Try this!) #Devuan (Debian w/out Systemd) #Parrot (#Pentesting 😀) https://t.co/6BEsVswGsI https://tinyurl.com/ye2mc7xj (17s ago)
<IgorPec> stipa: use those https://amzn.to/3uqBvzf
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<Heisath> Morning
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<IgorPec> heisath: morning
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<lanefu> mornin
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<IgorPec> morning
<stipa> IgorPec: yeah, i see lot's of peeps are using that DC-DC converters
<stipa> how to they handle heat under load?
<stipa> is it something to care about?
<IgorPec> i have a few and they are good for <2AMP
<IgorPec> would not attach much more on those
<stipa> i see
<stipa> practically one per peripheral
<IgorPec> they are cheap
<IgorPec> and i think more efficient then 7805
<stipa> yeah, i have no idea how can they get it made and sold that cheap, better from 7805 for sure, i guess 7805 starts to fall apart at 1.5 A or so :D
<stipa> 7805 is fine for low level signals and that stuff but not for spinning hard disks...
<IgorPec> probably. if you will have lots of disk, then check https://amzn.to/3thApUO
<stipa> 300W , oh wow that's alot
<stipa> that's like connecting nuclear plant directly to it
<stipa> on/off switch, that's handy feature
<stipa> i guess it's wortf a reasearching all that chips used in that converters
<stipa> before purchase
<stipa> there's many by the look of it
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<IgorPec> haha, i use this one to power test devices
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<Tony_mac32> the thing to look for is what happens during power on and power off
<Tony_mac32> sometimes the regulators do mean tricks like pass incoming voltage right to the output
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<stipa> that's not good
<stipa> passing 19V into 5V device, not nice
<stipa> maybe a 5v zener would help
<stipa> to dump that spike to the ground
<stipa> i guess there's no cheaper way than a zener
<stipa> i'm learning the internals of psu i want to mod, if i succssed i should look at athat on oscope
<stipa> if there would be spikes over 5V
<stipa> when i plug psu into mains
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<stipa> and... the psu blew
<stipa> shorted something with dmm leads on the hot side
<stipa> half of the components are chared
<stipa> i was so colose to victory
<stipa> close*
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