On Thu, 18 Mar 2010 14:00:43 GMT, firstname.lastname@example.org (GregS)
When used within its design and operating limits (e.g., "Caution: Do not
connect or disconnect a motor while the driver is energized. This will
cause permanent damage to the A3967 IC.") the board shouldn't be
damaged. If you have managed to do so, it would be good feedback to the
designer and also to Sparkfun. What did you do and how did it become
That information would also help to guide the choice of alternate
The first board failed off the start, but I powered it first
without motor connection. I used first a 12 volt supply
and the board gets real hot set at about 400ma.
I switched to a 9 volt supply and added a sink, and
it stayed at a good temp. Was going over 150 dgrees at first.
The second seemed to start to act screwy, then I started to adjust the current
control down to minimum and a fuse blew at 1/2 amp. Then after
replcing fuse the motor started to sing a note and does little.
Am using a very small motor. Using a Galil controller and a $600 motor drive
attached to a slider.
I ordered the Pololu board, still an Allegro chip with little heatsinking.
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