Fan (cooler) mod for SEGA Dreamcast.

[aldair]

The mod is for use with any 30x30x10 5-volt fan, achieving the same The mod is for use with any 30x30x10 5-volt fan, achieving the same function as the original, requiring a 10k resistor between the positive terminal and the fan's PWM wire.

I wanted to find these fans like in the video below:

[MannyMania]

Nice!!!! It doesn't look like a reboot so is it a low power standby you've come up with so there's no overheat? If you were in a game and did this would it pause and then resume?

[aldair]

(28.11.2025 00:40)MannyMania писал(а):  Nice!!!! It doesn't look like a reboot so is it a low power standby you've come up with so there's no overheat? If you were in a game and did this would it pause and then resume?

The mod is for use with any 30x30x10 5-volt fan, achieving the same function as the original, requiring a 10k resistor between the positive terminal and the fan's PWM wire.

I wanted to find these fans like in the video below:

[MannyMania]

Oh!! Okay thanks. I didn't know stopping the fan and video going off was original functionality. I thought it was not only a custom fan but also a mod to stop the system on fan failure as well.

[aldair]

(28.11.2025 10:46)MannyMania писал(а):  Oh!! Okay thanks. I didn't know stopping the fan and video going off was original functionality. I thought it was not only a custom fan but also a mod to stop the system on fan failure as well.

This is IC601, which cuts 3.3 volts from the processors when the fan stops working or is not connected.

If you remove IC601, the Dreamcast will work without a fan.