Schematics Unofficially Finished!!!

I am sleep deprived

Hi y’all, it’s finally happened! After hours of work, I have 9 pages of electrical schematics for my handheld gaming console, and after depriving my sleep a bit more checking for errors it’ll be ready to move on to the PCB stage!

Here’s an overview of all my features and things:

• 4GB DDR4
• Quad Core 2ghz RK3566
• 7” MIPI-DSI touchscreen
• Onboard RP2040 for gamepad
• 2x USB-A ports, 1x USB-C port for charging and debug
• HDMI port
• Fan port
• SD Card slot
• Overengineered battery and power system
• Basically full functionality as a desktop computer as well
• UART debug header and lots of test pads

Btw I can’t upload more than 4 pictures 😭

I’m really excited for this since this should be able to actually play some games like modded Minecraft, Balatro, PSP/PS1/N64 games, and various others!

What’s next:

• Checking for errors
• Assigning footprints
• Working on the PCB
• (And eventually designing a case for it)

Added 2x USB-A ports and a few other things

I Used a reliable USB2514B chip as my USB hub to add two USB ports with safe current-limiting TPS2051B chips by texas instruments

I also added a high-speed MUX circuit using the TS3USB221A chip, so now there will be a physical switch to change between chip flashing mode via USB-C and normal USB-A host operation.

• Also fixed the Compute Module’s power input
• Did a few other things that my sleep-deprived ahh can’t remember

What’s Next:

Adding a 7” Touchscreen to the handheld!

Fixed power management issues and made custom connectors for the compute module

Gaming Handheld Devlog #2

Hi y’all!

This is the third day of working on my gaming handheld, and I’ve made a lot of big changes and fixes:

• This time actually finished the power management part, with a brand new 3.3v buck convertor, and some other miner fixes
• Made custom symbols for the RPi CM4 connectors, and wired up most of their power
• Added the SD Card global labels

Whats Next:

• Adding a high-speed USB MUX
• Adding a MASKROM Recovery Switch Circuit

Ultimate Gaming Handheld Devlog 1:

Finished USB-C Charging Circuit:

• Standard USB-C input done
• BQ24075RGT battery management chip
• TPS61088 5V 10A synchronous boost convertor
• MAX17048 bsttery telemetry chip

What’s next:

• Working on the actual compute module itself!
  It’s going to have a quad-core RK3566 chip and 2 or 4gb of DDR4.