Microphone Preamp Design Assistance


Sure — here’s the simple cheat sheet version.
ESP32 motor pin cheat sheet

Table


MotorESP32 control pinMOSFETMotor connector
Front leftESP32-CAM1 IO0_0Q2Front L
Front rightESP32-CAM1 IO0_1Q4Front R
Rear leftESP32-CAM1 IO0_2Q6Rear L
Rear rightESP32-CAM1 IO0_3Q8Rear R
Battery and power path

Table


ItemConnection
Battery +BATT PIN1 -> VBAT
Battery -BATT PIN2 -> GND
Motor supply sourceVBAT goes to drains of Q2, Q4, Q6, and Q8
ESP32 powerVBAT also feeds ESP32-CAM1 5V
Motor connector wiring

Table


Connector pinMeaning
Pin 1Switched motor positive from MOSFET source
Pin 2GND
Super short summary
  • ESP32-CAM1 controls 4 motors with IO0_0 to IO0_3
  • Each output drives one MOSFET: Q2, Q4, Q6, Q8
  • BATT provides VBAT
  • Motors connect between each motor header and ground
If you want, I can also make this into a 1-line wiring map like:
IO0_0 -> Q2 -> Front L, etc.
Can you fix the wiring and adjust the wiring
Yes, but not in this project directly because you only have view access here. Rewiring is a multi-step project modification task that normally goes through a plan/execution flow .
The easiest way is to fork this drone project into your own editable copy and continue there:
After you open the fork, I can help you:
  • inspect the current motor wiring
  • fix the battery and ground path
  • verify each ESP32 motor control connection
  • summarize exactly what changed
If you want, I can also help you decide what wiring should be corrected first before you open the fork.
Prioritize wiring issues
Review motor mapping
Check battery path

BATT
ESP32-CAM1
R7
Resistance
1kΩ
C3
Capacitance
0.1uF
R19
Resistance
4.7kΩ
R3
Resistance
1kΩ
R5
Resistance
120 Ω
C4
Capacitance
2.2nF
R14
Resistance
1kΩ
R11
Resistance
1kΩ
R9
Resistance
120 Ω
R18
Resistance
4.7kΩ
R15
Resistance
1kΩ
R2
Resistance
1kΩ
R12
Resistance
100 Ω
R17
Resistance
4.7kΩ
R4
Resistance
100 Ω
R6
Resistance
1kΩ
R13
Resistance
120 Ω
R8
Resistance
100 Ω
R10
Resistance
1kΩ
C2
Capacitance
0.1uF
C1
Capacitance
2.2nF
R1
Resistance
120 Ω
R16
Resistance
100 Ω
Q5
Q4
Q1
Q3
Q6
Q8
IC1
Q7
Q2
Front R
Rear R
J1
Front L
IC2
Rear L
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