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Stepper Motor Driver

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Chippie

Member
Could someone please help me with the logic circuit required to drive a 3 volt 10ohm motor in a forward direction only via this IC
Look at the first line of the truth table...It tells what pins need to be hi/lo to make the motor go forward......
 

Wp100

Well-Known Member
You need two switches as shown, - one connected to pins 4,5 and one to pins 12,13
 

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carlson

New Member
So the Pins need to be switched to cause the motor to run and the speed depends on the rate of switching?
 

Wp100

Well-Known Member
Using switches will send the motor at full Vcc speed.

If you want to control the motor speed then you have to use PWM or something similar - a way of sending switched pulses to the Driver chip.

Searching this forum on Stepper Motor Drivers will give you a better idea - a popular combination is the L297 logic chip with the L293/8 drivers
 

carlson

New Member
How do I use this photo interrupter circuit (without relay) to pull pins 12/13 (in12/22) low when beam blocked and high when beam not blocked.

Silicon Chip Online - Circuit Notebook
 
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