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I want to control my 12 volt geared DC motor from my Arduino Uno. I want it to be able to rotate both directions as I'm intending to use it for a robot. Can I use the L293NE H-bridge in this case? The following diagram shows the pin connections. For this I'll have to externally supply the IC with 12 volts, but will I be exceeding the maximum voltage rating for the IC? I dont really want to blow up the IC in the midst of all that circuitry. Please tell me if there's a more suitable h-bridge for handling 12-volts, or another approach to my problem.

enter image description here

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  • \$\begingroup\$ You don't give the current the motor requires, and that is what will determine whether it is suitable. \$\endgroup\$ – Pete Kirkham Jun 10 '13 at 13:12
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To answer your question whether you will damage the L293NE IC, no you wont damage it if you provide 12V. Take a look in the datasheet, there is a section stating the recommended values for each pin. So pin 8 which is the one you will be powering your motors off, can take up to 36V.

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Yes, yours is a very common application. That chip has two power pins. Pin 16 is for the logic level, which you would supply with 5 volts. Pin 8 is the positive supply for the motor drivers, which you would put 12 volts on.

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Consider using a mosfet. A mosfet allows low amp controllers such as a processor to activate/deactive high amp circuits, such as a large stepper motor.

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    \$\begingroup\$ A singe MOSFET will not be able to rotate the motor in both directions. \$\endgroup\$ – gbulmer Aug 27 '14 at 1:10

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