| 摘要 |
An ambient condition detector incorporates a control switch which can be actuatable by one of a plurality of circumstances. In a response to an actuated switch, control circuitry of the detector selects at least one predetermined function or process to carry out. The control circuitry can include a programmed processor and a storage unit. A plurality of processes or functions can be stored in the storage unit. One or more of the processes can be selected for execution in response to signals received from the control switch. The switch can be closed in response to manual actuation, a magnetic field, or incident electromagnetic radiation such as RF signals or a beam of light.
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