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Member Since: April 2, 2009

Country: United States

  • Product ROB-11699 | about 10 months ago

    On the second one, I think you are right. The first one I didn’t hook up anything to the Vcc pin, but it failed in a different way. The second one, the regulator has failed, so I’m sure that’s how I fried it…good point!

  • Product ROB-11699 | about 10 months ago

    I’ve managed to burn up two of these so far. Using a +5VDC 2A supply for the logic (shared with an ATMEGA88), and a +24VDC 7A supply for the motor power. Never unplugged the motor while powered. The first one made an audible pop before dying, after working normally for about an hour. The second one the A4988 chip caught fire while the ATMEGA88 was toggling it’s enable sleep and reset pins. Anybody have a similar issue? I’m left scratching my head trying to figure out what happened…

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