Project Silver Box
Recorder

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Exterior |
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While gathering all the parts on the basement I also modified the case.
First I made rectangular hole for external motherboard connectors and
some holes for power supply controls.
I installed external CD-ROM drive activity LED and eject button on the
top cover of the case and connected them to the CD-ROM drive card instead
of standard controls. It was also made there a rectangular hole for CD
tray. On the bottom of the front panel I installed Sleep LED, HDD activity
LED, Power LED and Reset (white) and Power (red) buttons.
During testing my new PC I discovered that the power supply produces
considerable amount of heat and needs active cooling. And at the same
time, it has become clear that power supply card is 0.16in (4mm) higher
then the height of the case. So I cut rectangular hole in the case cover
right above the power supply and installed there a lid, made of other
old power supply cover. I also installed two 2in (50mm) ball bearing fans.
One of them blows inside, other one — outside. They create
"local" airflow inside the power supply.
I also installed two additional fans, to cool other internal parts of
the PC. One of them is 2.36in (60mm) "Thermaltake" ball bearing
7000rpm fan and the other one is 3.14in (80mm) "Top Motor" sleeve
bearing fan. The first one blows inside, the other one — outside.
Both of them are connected to a switch varying their speed (normal/slow)
by changing voltage: 7V or 12V. "Slow" position of the switch
is usually used. Other position may be used when the temperature outside
the PC approaches to 86F (30C) degrees (so it is a "hot Summer mode").
One more reason to use "Slow" mode is noise. Thermaltake fan
at its maximum speed (7000rpm) produces sound like a jet airplane (but
I like it — quietness of a PC is not important for me).
The switch and two-color LED showing current mode are placed near 60mm
cooler.
Above the fan you can see four port connectors: two USB and two
Firewire.
In conclusion I made a highlight for external motherboard connectors.
It is very useful if you want to connect something "on the fly",
speakers, for example, or microphone. It lights when the PC is switched
on.
I only used four bright white LEDs to make such a nice feature.
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