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Use ATMEGA2560 and L298 IC driver to control Stepper motor

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MrNguyen

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I designed a circuit like this, but when I run the simulation the motor won't spin. So what's wrong with my circuit? I'm using proteus 8
motor.png
 

Circuit looks correct, I guess it's a software problem.
Presume the processor model doesn't care about actual power supply and the processor is configured for internal oscillator.

BTN1 is however not working. PB7 tied to VCC.
 
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So if I want BTN1 to function, what I have to do? Like if I press/hold the button, the speed of the motor changes.
 

Hi,

Straight forward debugging:
use a scope to show the stepper control signals.

Klaus
 

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