Most storage devices that do not require vision and a brain to read data fall into this category. Electromagnetic data may be stored in either an analog data or digital data format on a variety of media.
Direct Tripwire Alarm - The wire placed across the path is directly connected with the cord, wire or string placed across the particular path. Laser Tripwire Alarm - An invisible laser, typically an infra-red, is used instead of a cord or string.
Wire the Relay. Connect the negative side of the relay coil to ground. Connect the positive side of the relay coil to the switch that will operate your accessory.Connect the common (C) terminal of the relay to the battery source that will provide power to your accessory.onnect the positive side of the relay coil to the switch that will operate your accessory. Connect the common (C) terminal of the relay to the battery source that will provide power to your accessory.