Powering Audio System from Battery

flux

I’ve completed the schematic cleanup and net rework.
Work done
  • Removed all redundant ground symbols and net portals; deleted C2.
  • Tied returns to B-: J10, J12, C9 (P2), C10 (P2), C11 (P2), C12 (P2), C14 (P2); severed residual GND net.
  • Fixed audio input:
    • Connected J13 (P3) → C13 (P1)
    • Connected C13 (P2) → R1
    • Connected R1 (P2) → J4 (P3)
    • Shunted C14 (P1) to B-.
  • Verified and labeled power nets:
    • 5V_IN on J13 (P1), C9 (P1), C10 (P1)
    • 9V_IN on J4 (P1), C11 (P1), C12 (P1)
    • Isolated B+/B- and CHG+/CHG-; assigned labels B+, B-, CHG+, CHG-, 5V_IN, 9V_IN.
  • Severed unintended connections: J9 (P1) from B+, J8 (P1) from B-.
Couldn’t perform
  • Running full ERC and DRC checks and auto-fixing flagged issues in this environment.
Success criteria
  • ✅ No residual GND symbols or net portals.
  • ✅ B- is the single star ground.
  • ✅ Audio network implemented correctly.
  • ✅ Power nets verified and labeled.
  • ⚠️ ERC/DRC pending.
Next step: would you like me to prepare the PCB layout or run the ERC/DRC review manually in Flux?
J13
J9
J11 P1 - J4 1
J10
J13 3 - C13 P1
J6 P1 - J13 2
J6 P1 - J13 2
J6 P1 - J13 2
J6 P1 - J13 2
J6 P1 - J13 2
J6
J11 P1 - J4 1
J11
C13 P2 - J4 3
J6 P1 - J13 2
J11 P1 - J4 1
J9 P1 - J13 1
J12
C13 P2 - J4 3
J9 P1 - J13 1
J6 P1 - J13 2
J11 P1 - J4 1
J6 P1 - J13 2
C13 P2 - J4 3
J5
J8
J6 P1 - J13 2
C13 P2 - J4 3
P1
U1 OUT - U2 VIN
R1
Resistance
1kΩ
C14
Capacitance
3.3nF
GND
C11
Capacitance
100nF
C12
Capacitance
100µF
J4
C10
Capacitance
100µF
C9
Capacitance
100nF
C13
Capacitance
0.47 uF

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Documents

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

    Assets

    Brainstorm w Copilot.png

    Brainstorm w Copilot.png

    Brainstorm w CopilotThumbnail

    Brainstorm a new project with AI [Example]

    Brainstorm a new project with AI [Example] thumbnail
    Battery-Powered Audio/Bluetooth System with External TP4056 Charging, Dual MT3608 Boost Rails, and Star-Grounded Power Domains

    Properties

    flowchart TD Battery --> Charger Charger --> SYS SYS --> Boost9[Boost Converter 9V Output] SYS --> Boost5[Boost Converter 5.3V Output] Boost5 --> LDO[LDO 5V Output]

    Separate PCB into distinct power domains: 5 V zone around MH-M18 module, 9 V zone around AN7112 amplifier, with a central star ground node at net B- serving as the single-point return connection between domains and to connectors.

    Battery

    11.325

    Battery

    400.325

    mm

    Power

    Arduino

    99.05

    mm

    Bluetooth

    10

    44.525

    Consumer Electronics

    Buttons

    -379.000

    -44.525

    9

    V

    Pricing & Availability

    Distributor

    Qty 1

    Arrow

    $0.08–$0.19

    Digi-Key

    $0.32

    LCSC

    $0.58

    Mouser

    $0.16

    Verical

    $0.14–$0.28

    Controls