I don't understand the difference between a motor-driver like this IC H-Bridge Motor Driver and a motor-driver like this Dual Motor Driver Board. When reading about them they do the same thing but the second one is obviously much more complex and more expensive.


1 Answer 1


Item 1 - The L293 has two H bridges and is a chip.

Item 2 - The Ada fruit product is a circuit board with two chips and each chip has a single H bridge.

Item 1 and item 2 are functionally very similar however Item 2 has H bridges that are superior.

Item 1 is a chip that needs soldering to a PCB and item 2 is a PCB with broadly the same functionality as Item 1.

  • \$\begingroup\$ Thank you. Can you tell me why I would choose one over the other? Item 1 seems so simple and way less expensive and can run a motor up to 36v while Item 2 can run up to 28v. Why is item 2 superior? Is it just less work because of the soldering? If you can add more details that would be very helpful. \$\endgroup\$ Feb 25, 2015 at 8:51
  • \$\begingroup\$ See this electronics.stackexchange.com/questions/108686/… - it explains why the L293 is so crappy. Admittedly it does work at a higher voltage range but as far as getting any sensible amount of current from it, it's a poor choice and will overheat badly. \$\endgroup\$
    – Andy aka
    Feb 25, 2015 at 8:59
  • \$\begingroup\$ I tried reading it, that stuff is over my head at the moment. I just don't understand what all else is on these complex H Bridge PCB's when they both do the same thing. \$\endgroup\$ Feb 25, 2015 at 9:05
  • \$\begingroup\$ OK, you asked for the detail and the devil is in the detail. Maybe you need to raise a new question about the pros and cons of driving a particular motor you have in mind? \$\endgroup\$
    – Andy aka
    Feb 25, 2015 at 9:10

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.