A method and apparatus of a universal interface compatibility of a sensor are disclosed. In one embodiment, a universal interface method includes acquiring an electrical power of an external source and conditioning the electrical power to provide to a sensor. The universal interface method further includes transferring the processed electrical power to the sensor, receiving a sensor output, converting the sensor output to a compatible form, and communicating the compatible form to an interface. The external source may include at least one of a USB power source, a battery, and a wall charger. The electrical power may be conditioned by at least one of detecting an input voltage, adjusting a variance of the electrical power, and altering a voltage of the electrical power. The compatible form may include at least one of a digital signal and an analog signal.