Trying to achieve a higher horse power from a Arduino, for what else other then drone motors! The mid level four logic's would be each a PWM (using analogWrite() to digital pins for speed control) and the top set of eight logic's would be a 74H chip's eight outputs (boosters). The 3.7v is direct to the battery then the battery to the VCC on the Arduino, skipping the 3.3v or 5v on the Ardunio itself. - nforystek