vasyl / ESP32-H2 Relay Board

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ESP32-H2 Relay Board Overview

flux

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69 days
akshaydwarakanath

akshaydwarakanath

implement the plan
69 days

flux

1:25

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You want me to implement the fix-and-hardening plan for this project. Here’s the plan I’ll run:
  1. Gather ERC/DRC results and triage issues.
  2. Schematic fixes: add a flyback diode on K1, complete LDO decoupling on U2, verify U4 drive and R1, ensure U1 EN bias.
  3. Verify nets and labels (12V, 3V3, GND).
  4. Re-run DRC; flag HV/LV creepage risks; adjust board size if needed.
  5. Re-run reviews, update BOM, and prep exports.
Click Start on the plan bar to execute. Let me know if you want any changes.
Plan
#Goal
  • Implement the fix-and-hardening plan for the ESP32-H2 Relay Board to resolve ERC/DRC errors, add missing protections (such as a flyback diode for the relay coil and proper decoupling for the AMS1117-3.3), validate key net connections, and prepare the project for manufacturing.
#Implementation plan
  1. Review and Triage
    1. Collect and review the latest ERC/DRC and system review results.
    2. Group identified issues by schematic, layout, and sourcing deficiencies.
  2. Schematic Corrections and Protections
    1. Select and add a flyback diode across the relay coil (K1 SRD-12VDC-SL-C) that is sized for the relay coil current; note that the clamp voltage will be Vsup+0.7 V.
    2. Verify and update the AMS1117-3.3 (U2) input/output decoupling by adding and confirming capacitors (e.g., C1 for 3.3 V and proper decoupling for the 12 V rail using C2).
    3. Verify and adjust the optocoupler (U4 HCPL-181-00CE) drive circuit by ensuring the LED wiring from U1 IO22 via resistor R1 and confirming the low-side transistor drive for the relay coil; adjust R1 as needed.
    4. Confirm ESP32-H2 (U1 ESP32-H2-WROOM-03) EN/reset biasing per datasheet. Resolve any issues with floating nets and ensure proper power portals.
  3. Net Connections and Labeling
    1. Verify the proper connection and labeling for critical power nets:
      1. Connect the 12V rail (Net 4) to PS2, U2 VIN, relay coil (K1), and decoupling capacitor (C2).
      2. Connect the 3.3V rail (Net 10) from U2 VOUT to U1 3.3V and related capacitors (C1 and C3).
    2. Ensure grounding is consistent and clear any unintended shorts between power and signal nets.
  4. Layout and Rule Verification
    1. Re-run DRC checks, clear any airwires, and address layout connectivity issues.
    2. Review board size and flag any potential high-voltage (HV) and low-voltage (LV) creepage and clearance issues for manual placement updates.
  5. Validation and Outputs
    1. Re-run all ERC/DRC and system reviews to confirm fixes.
    2. Update BOM entries as needed to reflect added or replaced components.
    3. Prepare and export manufacturing files once the project passes all review criteria.
#Success criteria
  • All ERC/DRC errors are resolved and reported issues are cleared.
  • The flyback diode and decoupling capacitors are correctly sized and added to the schematic.
  • Optocoupler and ESP32-H2 biasing have been verified and corrected.
  • Critical nets (12V, 3.3V, GND) are correctly connected and labeled.
  • The DRC report is clean and manufacturing files are successfully generated.
Run ERC/DRC review
Add flyback diode
Check AMS1117 decoupling
Verify key nets
69 days
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Documents

    Documents are markdown text files which describe project goals, capture details, or even simulation outputs.

    Assets

    ESP32-H2 Relay Board.png

    ESP32-H2 Relay Board.png

    ESP32-H2 Relay BoardThumbnail

    ESP32-H2 Relay Board

    ESP32-H2 Relay Board thumbnail
    This is a WiFi relay board based on ESP32-H2 WiFi module. It have AC-DC power supply with output 12V and relay for controlling voltage #esp32 #project #Relay #wifi #esp32-h2 #iot #template

    Properties

    creativecommons.org/licenses/by/4.0/

    Pricing & Availability

    Distributor

    Qty 1

    Digi-Key

    $7.35–$7.70

    LCSC

    $6.63–$6.74

    Mouser

    $7.69

    Controls

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