I recently decided to use the MB102 Bread Board Power Supply module to power my op-amp in my circuit with the 5V power supplies. The schematics for this board is located here (http://digsys.upc.es/rpi/comp/PS_Schematic.pdf).
I need a positive and negative power supply for this op-amp and so I have tried to configure the positive terminal from the first power supply to the negative terminal of the second power supply. Thus the negative terminal of power supply 1 should give me -5V and positive terminal of power supply 2 should give me +5V. This method is currently not working for me and actually caused smoke to come from my first module. I was wondering why this is and if i'm doing something wrong.
I have done this method correctly using a regulated DC power supply and a separate arduino UNO R3 +5V with the same connection and it successfully powered my op-amp with no problem.