Dc Motor Driver Circuit Using Uln2003

Dc Motor Driver Circuit Using Uln2003 Switch
Uln2003 Driver Board Pdf
Dc Motor Driver Circuit Using Uln2003 Diagram
Dc Motor Driver Circuit Using Uln2003 Cable
Uln2003 Led Driver

This project is an extension to two-phase Unipolar Stepper motor interfacing with AT89C51. In the previous project, transistor switches were used to interface the stepper motor with the microcontroller. Here the transistors have been replaced by using a ULN2003 IC to drive the stepper with 8051 microcontroller.

Stepper motor is a variable reluctance DC motor. When correct input sequence of signal is given to the motor, it starts rotation in steps. (For more detail refer Unipolar Stepper motor interfacing with microcontroller AT89C51).

ULN2003 is high voltage, high current Darlington arrays each containing seven open collector Darlington pairs with common emitters. Here it is used as a current driving IC. This IC is required because stepper motor require more than 60mA current and since controller doesn’t work at this current rating so this IC provides high current to the stepper motor.

In the circuit port P2 as output port which provide input sequence to four input pins of ULN3003 and output of ULN2003 drives the motor.

Input sequences are same as in previous project which are

Simplest sequence

0001

These ICs are used as relay drivers as well as to drive a wide range of loads, line drivers, display drivers etc. This IC is also normally used while driving Stepper Motors. The pairs of darlington in ULN2003 is esteemed at 500mA and can withstand peak current of 600mA.In the pin layout, the i/ps & o/ps are provided reverse to each other. I want to power a DC motor forward and backward using a ULN2003 driver board. It seems possible yet my attempts don't work. Power to the board is 5.2V and the votage between two pins when one is HIGH and the other LOW is 2.6V or -2.6V when they reverse. Voltage between ground and pins is 3.3V. The ULN2003 stepper motor driver board allows you to easily control the 28BYJ-48 stepper motor from a microcontroller, like the Arduino Uno. One side of the board side has a 5 wire socket where the cable from the stepper motor hooks up and 4 LEDs to indicate which coil is currently powered. The motor cable only goes in one way, which always helps. There was a wide usage of High voltage DC motors due to its energy efficiency. A logical circuit with Darlington transistor (NPN) was used to control the High DC load approximately equal to 50V and 500mA. This circuit could only be used for a single load. To solve this issue an IC name ULN2003 was introduced. ULN2003 Introduction.

0010

0100

1000

And for half step size