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unipolar stepper motor driver

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hossam abdo

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dear all

i use a microcontroller atmega16 and want to control a unipolar stepper motor

please i need a stepper motor driver circuit or a direct ic(driver from the controller to the motor directly)

thanks in advance
 

Hello all
i used
1 atmega16 through
2 uln2803 driver to
4 unipolar stepper motor
and wrote a code to control the direction of the motors.
the problem here is the speed and the torque of the motors are too low.
the power supply used for the motors is 12v 1A adaptive power supply.
how to accelerate motors and increase its torque?

thanks and need help fast
 

hossam abdo said:
Hello all
i used
1 atmega16 through
2 uln2803 driver to
4 unipolar stepper motor
and wrote a code to control the direction of the motors.
the problem here is the speed and the torque of the motors are too low.
the power supply used for the motors is 12v 1A adaptive power supply.
how to accelerate motors and increase its torque?

thanks and need help fast
Click to expand...

You havnt mentioned about the motor. Give details about the motor..
 

Holding Tourq: >800 gm.cm
2. Motor weight: 0.136 Kg
3. Power Requirements: 12 VDC
4. Communication: 4-phase step, 7.5° per step
5. Dimensions: Size/Style may vary
6. Operating

https://www.ram-e-shop.com/ds/motor/PM4222-09.pdf

---------- Post added at 09:50 ---------- Previous post was at 09:42 ----------

6. Operating Temperature: 32 to 158 °F (0 to 70°C)
 

You are using a 24v/240mA motor with 12v so the current will be half that the rated one and the torgue lower than specified.
 
i try more than one power supply
1- 12v 1A adaptive power supply
2- 6v 4A chemical battery
3- 32v 375mA power supply which is used in printer
4- 16V 500mA power supply which is used in printer
5- 24v 670mA power supply which is used in printer

and the difference between them over the motor is low
the difference only on the speed but the torque remain low
 

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