DIY ATX Bench Power Supply
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DIY ATX Bench Power Supply
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DIY ATX Bench Power Supply.
For more info, please visit my github: https://github.com/chanmin723/DIY-ATX-Bench-Power-Supply
Features
I modified the original design to better suit my specific needs and improve reliability:
Upgraded P-Channel MOSFET: Replaced the original IRF9540 with an IRF4905. This provides much lower $R_{DS(on)}$ and higher current capacity, reducing heat dissipation.
Simplified LED Circuitry: Removed the N-Channel MOSFET for the switch indicator. The switch LED is now driven directly, simplifying the internal wiring.
Streamlined Interface: Removed the USB charging ports as I personally do not use them.
Floating Output Support: Added additional Binding Posts for Floating Output, allowing for more flexible grounding configurations and preventing ground loops when working with sensitive test equipment.
WARNING: If you don't fully understand floating output exactly, keep the GND and Earth connected!!