Does a DC motor need a diode?
The advantage of this type of circuit is that configuration is simple, requiring just one power transistor. There are some drawbacks, however, including the fact that the motor can only rotate in one direction. Plus, it takes some time to stop, and a power diode is needed for clamping EMF.
What is the purpose of a diode across a motor?
The diode is to provide a safe path for the inductive kickback of the motor. If you try to switch off the current in an inductor suddenly, it will make whatever voltage is necessary to keep the current flowing in the short term.
Can a 12 volt DC motor be used in PWM mode?
But if you want easy and cheap. These are 12-volt DC variable-speed motor controller circuit using CMOS. They use the principle of PWM motor control mode. We can adjust the speed of 12V small motor. Even 6V or 9V Motor, this can be used, too. It is easy and uses a few components that IC digital and transistor driver as main.
How to use a flyback diode on a + /-12V motor?
We were getting voltage spikes in the common ground after sending big impulses to the motor, so we put a flyback diode from the negative cable to the positive cable. However, this caused the motor to be less responsive in the reverse direction. How do we correctly prevent voltage spikes in the ground from this type of motor?
Can you adjust the speed of a 12 volt DC motor?
We have many ways to do it. But if you want easy and cheap. These are 12-volt DC variable-speed motor controller circuit using CMOS. They use the principle of PWM motor control mode. We can adjust the speed of 12V small motor. Even 6V or 9V Motor, this can be used, too.
How does a 12V motor control work?
They include T1, D1, D2, and C1. T1 converts a main 220V voltage down into 12V. Then, AC voltage current flows through to D1-D4 to the full-wave rectifier into DC current. And, there is a C1 filter to DC voltage that smooth so well. This circuit is a full-wave rectifier that center tap transformer and 2 diodes.