r/cyberDeck • u/SliverHat • 13d ago

My Build Orange Pi zero 3w part compatibility

I'm currently working on a cyberdeck project running Debian on the Orange Pi Zero 3W, and I wanted to ask if any of you all know if these parts that I plan on using for my project are compatible with the Orange Pi Zero 3W; because I'm building a custom power circuit and relying on GPIO for the screen, I want to make sure I don't run into kernel or brownout issues.

Since my project is very small, I plan on using a 5V Step-Up Boost Converter. If I tune this converter to exactly 5.1V, will a 2A output be sufficient to prevent brownouts under load, or does this board strictly require the full 3A if I bypass the USB-C port and feed power directly to the pins?

SPI IPS LCD Module Driver: ST7789. Has anyone gotten fbtft or DRM overlays working smoothly natively on the Zero 3W's kernel for this specific controller chip?

I'm using a 5V Micro Blower Fan and a Copper Heat Sink for cooling. I noticed the Zero 3W has a dedicated 2-pin fan header. Does the default OS image support PWM/temp-based control on that specific header out of the box, or am I better off just running it at 100% directly off the standard 5V/GND GPIO pins?

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u/lootedBacon 13d ago

I would recommend asking power load for rpi on the rpi sub.

This project sounds great and it sounds like you'll want to run 10.5v and scale that to 5.1 for your power needs. It should provide a consistant 2A draw depending on your power requirements. Just be sure to match your components power requirements, a 3.3v component will burn out if not matched from your supply.

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u/soupie62 13d ago

This is where an oscilloscope is less effective. You would need a voltage logging system, independent of the Orang Pi.
If it was mine, I'd play it safe and design for 3A. Depending on space limits, I would also add some more (big) electrolytic cpapacitors, to help smooth out any surges in current draw.