alizan.electronic
New Member
I need an ATX power supply circuit diagram for using PC in my car.I want to modify ATX 300 watts power supply to do that. please help me...
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I would buy a cheap 12Vdc to 120V not-pure-sine inverter, and feed that to the PC![]()
Efficiency of the inverter should be better than 75%, while the ATX is a switcher which is about 80% efficent, so you are only wasting about 80W, overall efficiency is about 60%. How hard are you going to work to save maybe an additional 20% of 200W?It had a problems:unused a lot of watts
Your car supplies 12 to 14V DC.
Your PC wants +12, -12, +5, +3.3 VDC.
You do not need to modify the ATX power supply. You do not need neccesarely to go into AC inverters. You need to downregulate with beefy DC-DC converters.
It will not be cheap. Probably more $ than an used laptop plugged direct to the cigarette lighter.
ATX power supplies schematics are somewhere on the net.
Miguel
Current for +5 and +3.3 is whatever it has to be for your PC to run.
And that same exact current is the one supplied by the ATX supply if you use it.
Why do you say the ATX supply current is low ?
Yo do not waste Amperes; you waste Watts !
Miguel
want to design a rechargable lamp using LED's and recircled notebook batteries. please can someone help me with useful circut diagram both for the lamp and the charger to use.
Thanks
if you notic:for example: pc use +5V\20A and +3.3V\15A then sum of watts is about 150watt,if I use regulator to reduse +12 to +5 and +3.3 the used current from +12 is 35A and the used watts is 420 watt,in this metod the unused wattsis 420-150=270 watt and thet so much for car battry.