Schematic diagram

Be careful

Start with input , This design circuit has ：

1. Self recovery fuse
2. Anti reverse circuit
3. Step down and voltage stabilizing circuit
4. 555PWM Signal generating circuit （ Pulse width modulation ）
   Because the motor is an inductive load , Will generate flyback current , use SR560 Schottky diode protects the circuit , If you don't answer ,MOS Tube fever is very severe .
   MOS The tube heating can adjust the current limiting resistance behind the signal , hold 470 The resistance of ohm is reduced a little .

• Self recovery fuse selection ：
  The latter circuit is less than 10A, A little more , Use one 15A The line .
• Indicator circuit ：
  General LED Lamp current approx 5~20mA, about 24V For power supply , Access 4.7K resistance , Current approx 5mA.

thank

thank PN School , thank NEO teacher , follow NEO The teacher learned something about circuit .