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For optimal selection, the rule is simple: if you need a 10A model, a 20A model is more than enough, and anything less than 10A will be inadequate. So, set some limitations in your choice and select the right one.

Do not cut off more than the plastic insulation so that the copper wire is exposed. Cutting more than the insulation will damage the wires ability to properly carry current and may prevent the circuit from working.

Near the end of the datasheet document, you’ll find some application examples. The most important one for us is the bidirectional motor control using one channel of the L293D IC. Here is the given figure for that configuration.

Electronics and semiconductor manufacturers offer a rich selection of hardware and software components that you can use in your project. For example, in building a BDC motor controller circuit for the robotic lawn mower, we used STM32F4, which is part of the STM32 ecosystem for motor control.    

A breadboard, electrical tape or solder to make solid connections in the circuit. A tutorial for using breadboards can be found below.

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It is illustrated in the figure below. By diverting the current, the flux produced is reduced. Hence the speed can be increased above the normal speed.

Controllers that do receive feedback from the motor are called closed-loop, or feedback, controllers. They can detect deviations from the desired values and correct the control signal accordingly.

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This method of speed control is used in electric drive applications, where a sharp increase in speed is needed.

Rotation is maintained by continually switching the flux so that the permanent magnet is constantly chasing the rotating magnetic field induced by the coils.

In a DC series motor, the flux can be varied in different ways like diverting the field current, tapping the field current at different points in the field winding and paralleling the field coils. Let us discuss them in detail.

The maximum collector current 2N2222 can handle is 800mA. Keep this in mind while selecting the motor.

In this tutorial, we will cover the basic principles of DC motors and show you how to control the speed of a motor using PWM, an H-bridge circuit, and the L293D motor driver.

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