Movement sensor and actuator system powered by solar cells and which provides an indication of a low charge state of the energy store

摘要

The movement sensor and actuator system has a current supply unit comprising solar cells (7) and an energy store (6) connected to the cells. The actuator controls a light or lamp (5) which radiates at least some light onto the solar cells. An energy store monitor (8) determines the current charge state of the energy store. The monitor sends a signal to switch the light on when the charge state of the energy store falls below a minimum value, without movement needing to be sensed.