The scenario
A joystick speed signal (0-5V) drives the gate of an N-channel MOSFET that switches the low side of a 24V DC motor, with battery, fuse, main switch, and freewheeling diode for inductive protection.
What is in this drawing
Read the decisions behind it.
01
Use a low-side N-MOSFET switch for simple PWM or linear speed control
02
Include a freewheeling diode across the motor to suppress voltage spikes
03
Add a fuse and main switch for safe power disconnect
Reuse this topology for small to medium DC motor speed controllers where a potentiometer or analog joystick provides a 0-5V control signal and the load current is moderate.
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