I have brought the arduino pro mini. It's IO pins gives 5V. I wanted 3.7V. There's an onboard voltage regulator mic5025 and has 5 pins. I wanted to know if I can cut the traces and add a 3.7V regulator and if so what precautions must be taken. Also I can't use the 3.3V arduino pro mini cause I required 3.7 V only and no lesser.