Thread: new almost silent psu

This has been done for quite some time. I have a Compaq P75 machine(I dont know if I should be admitting to that) that runs the fan slowly and makes almost no noise. I also have another PSU that uses a NTC resistor to vary the speed of the fan based on the temperature on the air inside the case. This would probably be the best way so that the fan would run at full speed if it was a hot day and the player heated up. I believe a circuit to do this was published in one of the Australian electronics magazines(either Silicon Chip or Electronics Australia) I'll see if I can dig up an old copy out of my collection.

Technics, I also am ashamed about my 75 mhz compaq. I've got the Prolinea 575. Are you running a char. lcd? I just noticed that in the CMOS setup there is no way to switch modes on the parallel port. Just wondering if I am going to have to abandon this piece of crap and switch to something that is actually good.

Whoah, i am running a Compaq Prolinea 575e aswell. you have to download the Bios software, but I believe you can turn the Parrallel port to ECP.

you people and your Compaq's...thats funny about having the same pc though

Yeah that's the same model I have. Only I'm not using mine for an MP3 player(It's too big IMO). I've also hacked it to take a IDT 200 CPU(Had to hardwire the multipler under the cpu socket. It only supports up to a 120 on the motherboard.... Feel the G's). As for the parallel port, have you tried downloading the latest F10 setup utility from compaq? It is stored in a separate partition on the hard drive and there is no actual CMOS setup(kinda strange).

I grabbed the software, but it didn't seem to have any ecp options. I'll look again. What software exactly are you using, it is just the f10 setup thing? That just seemed to have very basic options, maybe i am missing something.

Yeah the thing is freaking big, but its easier than buliding a case for the other parts I have.

I'll have to take a look at mine when I get home. I'm using an old Amstrad 486 for my player(very compact). The mobo has been swapped for a super 7 board. I'll get some photos when i finally borrow my friends digital camera. I might also take some pics of me blowing up the Compaq

Originally posted by Technics:
<STRONG>I'll have to take a look at mine when I get home. I'm using an old Amstrad 486 for my player(very compact).</STRONG>

Amstrad, now thats a PC name I havent heard in AGES. I remember my first PC.... Amstrad XT, twin 360K floppy disk drives with 512K of ram, and CGA monitor!

ugh!

This one only cost me $20AU back in 1997. It is only about 30x25x7cm high and uses an ISA riser card. Have you tried to find/price a riser card? The orignal board was a custom 486 SL33 job. It required some severe caressing with an angle grinder to make a standard motherboard and a 5.25" drive bay fit. Soon I'll know if it was all woth it