MP3Car.com - View Single Post - Has anyone tried modifying a 110v atx PSU to 12v DC?

Aaron Cake · 11-10-2000, 11:33 AM

Quote:

You don't need to redesine the circuit.What I did was making a 50hz sine wave generator (it's 220v here) producing 220v through transformer,and putting it to the input of AT PSU.This is very similar to inverter. There were a few problems:you have to use quite a big transformer because of large currents,and it makes some buzzing noise,probably because the generator didn't produce pure sine wave.

So all you did was build an inverter? This has exactly the same problem as running a commercial inverter. Namely, innefficiency and noise.

For all that trouble, a $79 DC-DC converter sounds better and better...

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Aaron Cake
London, Ontario, Canada

Player: Cyrix 200, 32MB RAM, 10.2Gig Quantum HD, Onboard EtherNet/Sound/Video, Custom Lexan Case, Arise DC-DC, Win95 Kernal w/Custom Player
Car: '86 Mazda RX-7 w/Basic Performance Upgrades

11-10-2000, 11:33 AM	#9
Aaron Cake Retired Admin Join Date: Jan 2000 Location: London, Ontario, Canada Posts: 2,464	Quote: You don't need to redesine the circuit.What I did was making a 50hz sine wave generator (it's 220v here) producing 220v through transformer,and putting it to the input of AT PSU.This is very similar to inverter. There were a few problems:you have to use quite a big transformer because of large currents,and it makes some buzzing noise,probably because the generator didn't produce pure sine wave. So all you did was build an inverter? This has exactly the same problem as running a commercial inverter. Namely, innefficiency and noise. For all that trouble, a $79 DC-DC converter sounds better and better... ------------------ Aaron Cake London, Ontario, Canada Player: Cyrix 200, 32MB RAM, 10.2Gig Quantum HD, Onboard EtherNet/Sound/Video, Custom Lexan Case, Arise DC-DC, Win95 Kernal w/Custom Player Car: '86 Mazda RX-7 w/Basic Performance Upgrades __________________ Player: Pentium 166MMX, Amptron 598LMR MB w/onboard Sound, Video, LAN, 10.2 Gig Fujitsu Laptop HD, Arise 865 DC-DC Converter, Lexan Case, Custom Software w/Voice Interface, MS Access Based Playlists Car: 1986 Mazda RX-7 Turbo (highly modded), 1978 RX-7 Beater (Dead, parting out), 2001 Honda Insight "If one more body-kitted, cut-spring-lowered, farty-exhausted Civic revs on me at an intersection, I swear I'm going to get out of my car and cram their ridiculous double-decker aluminium wing firmly up their rump."