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agp.cooper wrote 02/19/2019 at 13:05 point

It could be an honest product if it was not marketed as being suitable for a stepper motor.

Okay, not too bad for one of those small high speed dc motor.

What is wrong with it!

1) It has a high voltage drop (at least 2 volts), and

2) the rated current is NOT achievable. The rated current is not achievable because the "cute" heat-sink" is way too small.

3) It has no current regulation (that is on board), yes you can use an Arduino to monitor the current and PWM the H-bridge. Still the maximum frequency is about 30kHz. Not great. I wasted a lot of time doing this.

4) And of course no built in micro stepping.

An A4988 or a DRV8825 are much better products for steppers.

For DC motors (that deliver the rated current) have a look at SparkFun's TB6612FNG.

AlanX

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agp.cooper wrote 02/19/2019 at 00:00 point

I hope your project will be better than the L298 H-Bridge.

The L298 H-Bridge is a dreadful product.

;)

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Mario wrote 02/19/2019 at 07:33 point

I am curious: Why is it dreadful? To me it always felt super useful and nice for prototyping. Sure you can get a smaller h-bridge, but this one does it's job perfectly fine. What's dreadful about it?

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