Motor Control Circuits – Circuit Wiring Diagrams This is circuit for dimmer a lamp or controll speed of a DC motor. I used to suggests these circuit by use principle most PWM (PWM Control Speed Motor 12V By TL494) form. But TL494 is not cheap and hard to buy we use NE555 beter very cheap and popular. This circuit have a lot of useful such as the DC dimmer , DC motor controller, etc. How do you wire a 12V dc motor for forward and reverse How do you wire a 12V dc motor for forward and reverse using 2 micro switches.? Please draw diagram Answered. Tags: R C Bait boat. It is the same wiring as Steve's drawing, This is the same diagram as used for house lighting where you have stairs and want to turn the light on or off from either the top or the bottom of the stairs. 24V motor control – Circuit Wiring Diagrams Posted by Circuit Diagram in Motor Control Circuits. This is the high quality PWM 12V-24V DC motor controller circuit for that has the low voltage battery checker system, working with soft start, adjust pulse frequency, Timer Diagram Wiring; Most Popular Circuits. Dc Motor Speed Control Wiring Diagram | Diagram Brushless dc motor drive circuit diagram arduino and l298n circuit diagram dc motor control speed control of dc motor using pwm 555 timer circuit 2 12v fan speed control circuit.