Motor Driver Design Guide

flux

Short answer: No. Based on knowledge base guidance for low-side MOSFET motor drivers (flyback diode across the motor; gate pulldown to source), your current nets are mis-assigned.
What’s wrong right now
  1. Q1 source is on Net 2 with J2:P1 (battery side). For a low-side switch, the source must go to battery minus (ground).
  2. The 10 kΩ pulldown R1 is currently gate-to-battery-plus (Net 3 ↔ Net 2). It must be gate-to-source (gate-to-ground).
  3. The flyback diode is effectively referenced to the wrong battery rail because Motor+ is tied to the net with J2:P2. Per knowledge base guidance, the diode cathode must be on the motor’s positive node, which is the same node as battery plus.
Correct net mapping to fix it
  • BAT_PLUS: J2:P1, J1:P1 (Motor+), D1:K
  • BAT_MINUS (GND): J2:P2, Q1:S, R1:P1
  • MOTOR_MINUS: J1:P2, Q1:D, D1:A
  • GATE: Q1:G, R1:P2
  • External ESP32: connect its GPIO to GATE and its GND to BAT_MINUS.
Notes
  • This places the flyback diode across the motor with cathode at Motor+/BAT_PLUS and anode at Motor−, as the knowledge base recommends.
  • Gate pulldown is from gate to source (ground), also per knowledge base guidance.
  • If you intend J2:P2 to be battery plus instead, we can keep the pin numbering but must reassign which pin is “+” vs “−” to match the mapping above.
Want me to apply these corrections and wire it now?
Rename nets
Swap terminal pins
View net mapping
Fix gate pulldown
D1
J2
R1
Resistance
10kΩ
Part Type
Resistor
J1
Q1
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Wily Crimson Neuralizer thumbnail
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