Abstract: Brake controller for controlling the brakes of a towed vehicle is provided. The controller includes microprocessor, an accelerometer, a storage array for storing a sequence of signals, and associated software for computing a moving average of accelerometer values thereby providing data on which the braking requirements of the towed vehicle can be determined. Feedback based on the power consumed during the braking event is likewise utilized to modify the power delivered to the braking system during subsequent braking events.