Overheated shunt resistor

The left one got too hot. It was running a few hours at maximum current (about 2.8A). As I found out later, it ran in unregulated mode, as two fuses were blown. The power to the microcontroller was cut off.

After replacing the two 100mA fuses with 160mA ones it works again. I just happened to have them, but I'll need to get proper ones. The shunt resistor will have to be replaced as well, as its insulation is breaking down. I've measured it to be 0.4Ω, but I can't trust that value. Maybe the manufacturer will tell me the correct resistance.