Nice 12v 5a Dc Motor Speed Control Circuit Diagram
I m not getting the full speed of the motor.
12v 5a dc motor speed control circuit diagram. One application of the 555 timer integrated circuit is the 12v dc motor speed control. Here is some circuit diagram of dc fan regulator using pwm method. When the wiper arm of potmeter vr1 is in top position capacitor c1 charges through r1 r2 and d1 and produces a pulse train at the output of ic1 with long negative and short positive pulse widths.
Dc motor speed controller circuit. These circuits are based on 555 timer. Tested at 12v 1a dc fan.
By using the above 12v dc motor speed control circuit diagram you will have a speed control between 5 and 95. On the other hand when the wiper arm of vr1 is at the bottom position c1 charges through r1 r2 and vr1 and discharges via r2. By this method smoothly controlled the speed of dc motor at negligible noise.
There is a noise in the motor a loud noise. By using this circuit you can control the speed of dc fan by tuning the potentiometer volume control variable resistance. The circuit diagram of the proposed dc motor speed controller can be seen below.
Therefore the motor speed is slow. P55n mosfet you can use any mosfet 50k potentiometer10k resistor12 volt power supplycircuit diagram. When i connect the motor directly to 12v battery it s slightly faster.