Ripple Lightstrip Schematic

H

hotdog13

Update the schematic with two separate 5V rails:
  1. 5V_SYS (always on): from protected input directly to XIAO 5V/VBUS pin. The ESP32 module must never be powered from the switched strip rail.
  2. 5V_STRIP (switched): from protected input through the high-side P-channel MOSFET to the LED strip screw terminal only.
GPIO17 (D7) logic:
  • HIGH = strip ON
  • LOW = strip OFF
Implement strip switch as:
  • High-side P-FET (>=10A, low Rds(on), e.g. AO4435-class or better)
  • N-channel low-side gate driver (e.g. 2N7002 or SOT-23 logic N-FET)
  • GPIO17 -> 100R -> N-FET gate, 100k pulldown on N-FET gate
  • N-FET drain pulls P-FET gate low through 10k
  • 100k pull-up from P-FET gate to 5V_STRIP source
  • Verify: GPIO HIGH turns strip ON, GPIO LOW turns strip OFF
Add net labels: 5V_IN, 5V_SYS, 5V_STRIP, GND, LED_DATA_3V3, LED_DATA_5V.

flux

Got it — I’ll incorporate the two-rail power architecture and the specified GPIO17 high-side switch logic before adding/wiring parts.

flux

I’ve updated the spec with separate 5V_SYS and 5V_STRIP rails and the active-high GPIO17 switch behavior. I’ll now choose parts around that architecture and keep the XIAO isolated from the switched rail.I’m blocked because there are no available ACUs, so I can’t continue executing project edits right now.
Accomplished so far:
  • Renamed the project to Ripple Lightstrip Mini Controller.
  • Updated the project description.
  • Created and updated the Project Specification with your requirements.
  • Integrated the latest change: separate 5V_SYS always-on rail and 5V_STRIP switched strip rail, with GPIO17/D7 active-high strip control logic.
Still remaining:
  • Select Flux/JLCPCB-friendly parts for the XIAO headers, 74AHCT125, MOSFETs, fuse, TVS, terminals, buttons, LED, and passives.
  • Add all schematic components.
  • Wire nets: 5V_IN, 5V_SYS, 5V_STRIP, GND, LED_DATA_3V3, LED_DATA_5V.
  • Verify the GPIO17 switch truth table.
  • Run schematic/ERC review and fix issues.
  • Later: PCB layout with XIAO antenna at board edge and copper keepout.
Add, wire, review
Find MOSFETs
Document rail split
Verify switch logic
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