Hello,
I made a project yesterday. I control a stepper motor with L293D and arduino uno.
Basicaly, I connect the 4 digital pins of arduino to the input pins of L293D (6 pins with two enable pins), I supply the circuit with 5V of arduino both for logic supply and motor supply and I ground back to the arduino. It works great.
However, my problem is when I want to supply the motor with an 12V source externally with a power supply (max 1.2amp). L293D heats itself like crazy (luckily it has a in-built thermal shutdown). I should also say that I use a common ground connection for both arduino and adaptor.
Does anyone have an idea about what the problem could be? should I also add a resisstor to the motor supply input for limiting the current?
Regards
I made a project yesterday. I control a stepper motor with L293D and arduino uno.
Basicaly, I connect the 4 digital pins of arduino to the input pins of L293D (6 pins with two enable pins), I supply the circuit with 5V of arduino both for logic supply and motor supply and I ground back to the arduino. It works great.
However, my problem is when I want to supply the motor with an 12V source externally with a power supply (max 1.2amp). L293D heats itself like crazy (luckily it has a in-built thermal shutdown). I should also say that I use a common ground connection for both arduino and adaptor.
Does anyone have an idea about what the problem could be? should I also add a resisstor to the motor supply input for limiting the current?
Regards
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