Use ancilla in a sentence. an aid for use as in understanding or accomplishing something; often, specif., a handbook, or manual. Origin of ancilla. see ancillary.
Making the world better, one answer at a time. The accelerometer in mobiles is used to measure the orientation or vertical and horizontal positioning of the phone. The most basic application of this is the device knowing when to alternate the view of the screen depending on how you are holding it.
Wireless Motion Sensor-Wireless motion sensors are mostly used in doors and windows. These could be convenient to place and easy to install. When the device detects movement or motion, it may send signals back to a base device that triggers an alarm.