LED Audio Project Files

flux

I recovered the ZIP schematic, added the missing passives/J9, wired the ESP32 socket/audio/WLED nets, fixed the SN74HCT125 VCC-to-+5V issue, and ERC is now clean for the checked items. Details are in Schematic Confirmation — ESP32 Socket Audio/WLED Board.
Open items:
  • I’m pausing before PCB layout because the recovered KiCad schematic has suspicious LM358 power wiring: U2 pin 8 is tied to GND and U2 pin 4 to AUDIO_REF.
Suggested next steps:
  1. Confirm whether to keep the LM358 wiring exactly as recovered.
  2. Or approve the likely correction: U2 pin 8 → +5V and U2 pin 4 → GND.
  3. After that, I’ll place and route the PCB.
M

michaelc11111

pin8 goes to +5v and pin 4 goes to ground and theres a 100nf feedback capacitor between those

flux

Got it — I’ll correct the LM358 supply wiring to pin 8 = +5V and pin 4 = GND, and add/use a 100nF capacitor across those rails at U2 for decoupling, then re-run ERC.

flux

I applied your correction: LM358 U2 pin 8 was moved to +5V, pin 4 to GND, and C3 100nF was reassigned as the capacitor between those rails.
I’m blocked now because the account has no available ACUs, so I can’t run the follow-up ERC/connection verification or continue into PCB layout.
Open items:
  • Re-run schematic/ERC checks to confirm the LM358 power-net edit is clean.
  • Verify C3 is correctly across +5V and GND and did not disturb the AUDIO_REF network.
  • Then proceed with board placement and routing.
Once ACUs are available, the next step is to verify the schematic, fix any net issues if found, then make the PCB.
Check then place
Verify C3 nets
Check LM358 power
Suggest placement
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Schematic Confirmation — ESP32 Socket Audio/WLED Board
Source inspected
Uploaded LED-Audio-Project.zip was unpacked and the KiCad schematic was parsed directly. The KiCad PCB file still contains no usable board data: no footprints, tracks, vias, nets, or outline.
What was reconstructed in Flux
  • Added the missing KiCad components: C1–C5, R1–R4, R9–R15, and J9.
  • Recreated the recovered KiCad connectivity nets.
  • Corrected the clear ERC error from the KiCad source by connecting U1 SN74HCT125N VCC to the recovered +5V net; C5 is the +5V decoupling capacitor.
  • Marked KiCad-isolated pins as intentional no-connects.
  • ERC check now reports no open warning/error checks for the selected schematic review set.
Functional connectivity summary
  • ESP32 socket power/header rails:
    • SOCKET_PWR: J1 pin 15, J5 pin 1, J6 pin 1, J7 pin 1, C4 positive side.
    • SOCKET_PWR_RET: J1 pin 14, J6 pin 2, J7 pin 2, J8 pin 2, R14 pin 2.
    • GND: J2 pin 14, U1 enable/GND pins, audio jack pin 5, several filter capacitor/reference nodes.
  • WLED data path:
    • ESP32_DATA_IN: J2 pin 11 → R9 100Ω.
    • BUFFER_IN: R9 → U1 1A.
    • BUFFER_OUT: U1 1Y → R11 100Ω.
    • WLED_DATA_OUT: R11 → J8 pin 1 and J9 pins 1/2.
  • Audio path:
    • J3 TRS jack pins feed R2/R3 and C1/R1/R10 filtering into U2 LM358 input network.
    • ESP32_AUDIO_OUT: J1 pin 4 plus R1/R4/R14/R15 and U2 pin 1.
    • AUDIO_REF and AUDIO_BIAS_FB nets reproduce the KiCad op-amp bias/filter network.
Schematic concern requiring user confirmation before PCB layout
The KiCad source appears electrically unusual around the LM358 power pins:
  • U2 pin 8, normally LM358 V+, is tied to GND in the recovered KiCad connectivity.
  • U2 pin 4, normally LM358 V−/GND for single-supply use, is tied to AUDIO_REF instead of GND.
This may be an intentional virtual-reference/audio bias arrangement, but it is more likely a KiCad wiring or symbol-unit mistake. I do not recommend committing to PCB layout until this is confirmed.
Before PCB placement/routing, confirm one of these options:
  1. Keep the LM358 power wiring exactly as recovered from KiCad.
  2. Correct LM358 for normal single-supply operation: U2 pin 8 to +5V and U2 pin 4 to GND, then adjust the audio bias network if needed.
PCB status
The schematic is reconstructed and ERC-clean after the U1 VCC fix. PCB layout should start only after the LM358 power decision is confirmed.

  • Source inspected

  • What was reconstructed in Flux

  • Functional connectivity summary

  • Schematic concern requiring user confirmation before PCB layout

  • Recommended decision

  • PCB status