Adding Components to Schematic

flux

Schematic design review
I found no power short reported between U1, U2, and U3, but there are important missing power connections.
Findings Review summary

Table

CheckResultNotes
Power shortsNone detectedNo short error reported between the 3.3 V, 5 V, and ground nets
Floating groundsNo isolated ground net detectedBut grounding is incomplete on U1
Missing power connectionsYesU2 and U3 both have issues
Specific issues 1) U3 input is not connected
  • ERC reports: Power input not connected: U3 VIN
  • That means the 5 V supply block is not actually being fed by any source.
2) U2 VDD is not considered driven
  • ERC reports: Power input not driven: U2 VDD
  • In the schematic, U2 VDD is tied to U1 3V3, but that net is not recognized as being driven by a power source.
  • So electrically it may be intended, but in the current schematic it is not a complete valid power path.
3) U1 ground is only partially connected
  • Only one ground pin of U1 is currently tied to ground.
  • U1 has multiple GND pins, and the others are currently unconnected in this schematic snapshot.
  • That is not a “floating ground net,” but it is an incomplete ground connection on the ESP32 module.
Existing connected nets

Table

NetConnected pins
GroundServo1 Gnd, U1 GND pin 1, U3 GND, U2 VSS
I2C SDAU1 IO21 to U2 SDA
I2C SCLU1 IO22 to U2 SCL
3.3 VU1 3V3 to U2 VDD
5 V servo railU3 +5V to Servo1 5v
PWM outputU2 LED0 to Servo1 Data
Bottom line
  • No short detected
  • No fully floating ground net detected
  • Yes, there are missing/invalid power connections
    • U3 VIN is unconnected
    • U2 VDD is not driven
    • U1 needs its remaining ground pins tied properly
If you want, I can next help you make a connection checklist for U1, U2, and U3 so you can finish the schematic cleanly.
@review decoupling check
@schematic full pin audit
@datasheet PCA9685 power pins
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