Electrical motor control circuit diagrams and electronics projects

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Electrical motor control electronics projects with circuit diagrams for stepper motors, dc motor, ac motor using simple and complex technology.
PWM controller and other circuits based on electric motors .

DC motor speed controller using PWM

This dc motor speed controller is designed using pulse width modulation (PWM), and can be used in circuits for controlling electric motors speed that require a maximum current of 2A. Of course the circuit can also be used for engines that have a higher consumption of 2 A, except that in this case it is necessary to provide additional cooling to T2 transistor TIP3055 type, and increase the value of C2.
The circuit is based on IC1 IC type 40106. Output of IC1a remain in 0 state at a time determined by R1 and in state 1 a period determined by R2 and P1.

Circuit Diagram: 
DC motor speed controller using PWM

PWM 12V dc motor speed controller circuit diagram

This speed controller is mainly designed for small 12V motors that do not absorb more than 2A. Many regulators limit the current through the motor, which reduces torque. The control circuit is based on a CMOS inverter, IC1 (type 40106). The motor is switched by a darlington with discrete components, T1-T2.
IC1a inverter operates as an oscillator whose duty cycle (the T2 leads, so the motor receives energy) is determined by R2-C2-D3. Gave the inactive signal oscillator (when T2 is blocked) is determined by R3-P1-C2-D4, and can thus be varied by P1.

Circuit Diagram: 
PWM 12V dc motor speed controller

12v fan controller circuit diagram

Using this circuit diagram can be made a 12v fan controller, for 12v fan whose consumption does not exceed 200mA.

Circuit Diagram: 
12v fan controller circuit diagram

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