about BP, please tell me

Hello, Ivan At work I was converting 20 ATX blocks from Colorsit 400 U-SCE, to 12 volts with current of 40 amperes at peak, rewinding the transformer, tearing out all components from outputs 3.3V, 5V, etc. reworked voltage monitoring. They showed excellent characteristics when working under load - a stand with radio tape recorders and amplifier to combat peak overloads, of which there are many at a time turning on the unit and charging all connected equipment, as well as at the moment powerful consumption from the amplifier, I used circuit refinements... the blocks work for 3 years now, 12 hours a day, only the fan needs to be cleaned once a year and that's it! ..For Spectrum you don’t even need to rewind the winding, just redo the tracking for voltage, it is started from 3.3 volts plus 5 volts, but you just need 3.3 disconnect and switch to 12 volts, selecting matching resistors.... in There are diagrams and documentation available on the internet... As for the fan, if the current consumption is up to 2-3 amperes, it will not be required, But it’s still advisable to install a 12 volt resistor at about 100 ohms 5 watts... not all have load resistors, without them damage is possible capacitors.

Hello, boo_boo The PC power supply already has resistors at the output. Even if you turn it on without a load, no There will be no damnation for him. And without a fan - at your own peril and risk. Someone wrote here, about the fan: http://www.zx.pk.ru/showthread.php?t=4513

Hello, boo_boo boo> I’m thinking... if you take a Pentagon-128 with a disk drive to feed it boo> A 200-watt PC power supply and rip the fan out of it, won’t he be offended? boo> :v2_unsur; boo>; boo> or will the load not be enough for him? I vaguely remember how one of my boo> a friend additionally attached resistors to the power supply in such a situation boo> for a reason, probably?.. I didn't bother to rip it out. I just “strangled” it - I took a powerful variable resistor... I unscrewed it to condition so that the propeller “just spins”, locks the rezuk - sticks it in permanent. Now my propeller spins at 200 revolutions per minute. You can’t hear it at all, but the air moves slightly.

Hello, Mikka_A I didn’t rip out the propeller, but soldered it to 5 volts - it’s completely inaudible, spins slowly.

Hello, Evgeny Muchkin Evg> I didn’t rip out the propeller, but soldered it to 5 volts - it’s not audible Evg> absolutely, spinning slowly. Not everyone starts at five volts. There's a chip there too. Then it’s easier to take +5 and +12 and power it from them, without land.... 12-5=7 volts. Almost everyone starts from such tension.

Hello, Mikka_A thank you for reassuring me otherwise I’ve been paranoid ever since I plugged the auto regulator into the power supply fan speed, it turned into a smoke bomb. but that was at the PC :rolleyes: