BFKK 3U Rackmount Server Chassis EATX/ATX/MATX 4x5.25 6x3.5 Top/Side Cooling
- Rackmount
JMT
Breaks out a 24-pin ATX supply into adjustable 1.8–10.8 V plus fixed 3.3 V, 5 V and 12 V rails with screw terminals, a three-digit 12 V readout and USB QC 2.0/3.0 ports, all housed in an acrylic case
The JMT breakout board converts a standard ATX 24-pin power supply into a bench-top source with fixed 3.3 V, 5 V and 12 V rails plus an adjustable 1.8 V to 10.8 V output controlled by a knob. It is aimed at makers, embedded developers and hobbyists who need clean low-voltage rails for microcontroller boards, single-board computers or small motor drives without building a custom supply.
The bundled acrylic enclosure protects the PCB and keeps screw terminals accessible while the three-digit LED panel shows the 12 V rail voltage in real time. A twelve-port USB 2.0 hub adds convenient 5 V charging or data connections for devices such as Raspberry Pi, Banana Pi or Tinker Board, and Quick Charge 2.0 and 3.0 support enables faster charging for compatible gadgets.
The 60 mm by 99 mm red ABS board mounts inside the acrylic case and presents every output on clearly labelled screw terminals for secure, tool-free wiring. Fixed 3.3 V suits STM32 and wireless modules, 5 V covers USB peripherals and single-board computers, 9 V drives small motors or display modules, and 12 V handles loads under 24 W such as LED strips or vehicle accessories. Builders needing higher currents, additional fixed rails or a fully enclosed metal chassis will need a different solution.
| Chassis Type | Desktop |
|---|
The adjustable voltage knob controls the 1.8V to 10.8V output range; potentiometers can develop contact resistance over time, so periodic verification of the three-digit LED voltage readout is advisable.
The 12 V rail is rated for devices drawing less than 24 W, so sustained loads above that threshold will hit the board's output limit before the ATX supply itself.
The ABS and acrylic enclosure has no active cooling; heat from the onboard regulation for 3.3 V, 5 V, 12 V and the adjustable 1.8 V to 10.8 V rails is passively dissipated through the case panels.
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