I may be confusing my memory between the Oak-D and the Oak-D-IoT-40 regarding which one "smoked" because I have one of each ... I think it actually was the IoT device, and it only happened once the first time I connected both cables. I think I connected the barrel jack first. After the puff of smoke, there was a "burned semiconductor" smell, and I am guessing that there could be a diode between the barrel jack input and the USB input that shorted. I have not looked at the schematic, though to confirm this.
I can try to recreate the issue but I think that whatever happened was a 1-time thing since I am pretty sure some component (diode?) was permanently damaged.
However, the Oak-D is the device that sometimes gets noticeably hotter than other times. I can try to look for a correlation between usage and heat, and if I can discern one I will post an update.
