I hooked up the power backwards on a custom power harness and smoked the board (Maybe add diode protection on future boards?).
We don't have plans yet, but if folks keep hooking up power backwards, we might have to look at it. This is an important detail in the support though, that power was hooked up backwards. Is csherstan related to Dan Adiletta, or are you two working on different projects?
The motor driver is definitely toast, big hole in it. When I connect power and turn it on I get no LEDs. I also only get 1.2-ish volts off the power regulator. So I’m going to replace the power regulator and the motor driver.
A hole in an IC usually indicates it’s damaged. And yep, the power regulator isn’t designed to take power backwards, so it’s probably toasted as well.
BTW, do you guys have a good way to remove the power regulator? It’s glued on and I ended up just ripping it right off the board, including the bare metal it was glued to. Solder pads are still in good shape though.
It's actually surface mounted, not glued. So the best way to get that off is to use a hot air rework gun. It's nearly impossible to do with a single soldering iron because it has so many soldering point.s
John, any idea what the chances are that the other chips on the board are fried as well? No signs of damage. No caps blown.
Hard to guess on this one. Most everything is protected by the 5V regulator, so it's worth a shot.
I’ve already sent an email about ordering just a replacement board.
Got you. Have you had any response back? Our team has been busy lately.