RP2040 Zero Board Design
Thought for 14 sec
Do you mean 3 physical assembled boards, or 3 additional identical channels/sets on the same PCB?
If you mean 3 physical boards, the design quantity just needs to be set to 4 total boards when ordering; the schematic stays the same.
If you mean 3 more identical circuit sets on one PCB, that would become:
- 4× RP2040-ZERO carrier sections total, or
- 1 RP2040-ZERO controlling 4× sets of mux/opto/terminal blocks — depending on what you intend.
Also, you only have view access to this project, so I can’t directly edit it here. I can help you create your own editable project with this design copied into the prompt.
I mean 3 additional identical circuit sets on the same PCB.
Thought for 10 sec
Understood: revise the design to 4 identical circuit sets total on one PCB.
That means the board becomes:
- 4× RP2040-ZERO modules
- 4× TCA9548APWR I2C muxes
- 32× I2C channel screw terminals with SDA/SCL/+3.3V/GND
- 32× PC817 optocouplers
- 32× opto output 2-position terminals
- One shared 5–30 V input and a larger shared 3.3 V regulator, or four isolated/local 3.3 V regulators if you want each set independently protected.
Important change: the original 3.3 V/1.5 A regulator is likely undersized for four full sets plus all peripheral terminals. I’d revise the supply to at least 3.3 V / 5 A unless you know the external I2C peripherals draw very little.
Since you only have view access to this project, I can’t edit it directly here. Best next step is to create your own editable project with the updated 4-set design prompt:
Create editable 4-set RP2040-ZERO carrier project
Create editable 4-set RP2040-ZERO carrier project
Shared 5A regulator
Manual duplication steps
Estimate current budget
Regulator topology comparison
Document architecture
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