Described here are stimulation systems and methods for stimulating one or more anatomical targets in a patient for treatment conditions such as dry eye. The stimulation system may include a controller and a micro stimulator. The components of the controller and micro stimulator may be implemented in a single unit or in separate devices. When implemented separately, the controller and micro stimulator may communicate wirelessly or via a wired connection. The micro stimulator may generate pulses from a signal received from the controller and apply the signal via one or more electrodes to an anatomical target. In some variations, the micro stimulator may include a passive generation circuit configured to generate a pulse based on a signal received from the controller.
