Sound Box Schematic Adjustment

flux

  • Connected U2:+OUT_L to H1:P1
  • Connected U2:-OUT_L to H1:P2

Removed residual portal nets

1:14

Started: 6.1. Remove or rename all residual U2.* portal nets so no unintended portals remain.

Worked

0:25

flux

Work done
  • R4: set to 10 kΩ, footprint 1206, P1→3V3, P2→BUTTON
  • KEY2: P1→BUTTON, P2→GND, tied to U1's BUTTON pin
  • U1↔U4: TX→RX (net TX), RX→TX (net RX)
  • U1↔U3: D0→RX (net D0), D1→TX (net D1)
  • U3: VCC moved from 3V3 to BAT_VCC
  • U1 BAT pin→BAT_VCC
  • SW2 & BUTTON1: pin 1→BAT_VCC, pin 2→GND
  • U5: common anode→3V3, RED→U1, GREEN→U1, BLUE→U1
  • U3→U2 (net AMP)
  • U2→H1 (net OUTL+), U2→H1 (net OUTL-)
  • Removed all residual U2.* portal nets
Success criteria review All specified resistor configuration, net connections, power routing, RGB LED wiring, audio header labeling, and portal cleanup match the reference schematic.
Next step Prepare the PCB layout: review footprints, configure stackup, and set up board rules for layout.

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    Sound Payment thumbnail
    Payment Notification Audio Alert System using XIAO ESP32C3, DFPlayer, SIM800L & PAM8403

    Properties

    Diagram
    


  
    
  
  
    
  



""Power Path""


""Communication""


""Audio Chain""


""User Interface""














TX

TX

D0

TX

AMP

OUTL-

BUTTON

LED









"Battery Connector"
"Battery Switch"
"XIAO ESP32C3"
"DFPlayer Mini"
"SIM800L"
"PAM8403"
"Speaker Header"
"Tactile Button"
"RGB LED"

    Pricing & Availability

    Distributor

    Qty 1

    Arrow

    $6.24–$6.60

    Digi-Key

    $11.68

    LCSC

    $38.62

    Mouser

    $11.60

    TME

    $11.74

    Verical

    $11.19–$44.21

    Controls