Method and apparatus for wet contact detection in a portable communication device
First Claim
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1. A method detecting wetness in an accessory jack of a portable communication device, comprising:
- monitoring a resistance at an accessory jack detect pin of the portable communication device;
determining whether the resistance falls within a predetermined range associated with wet contacts; and
providing an alert to a user that the contacts need to be dried.
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Abstract
A method of detecting wetness in an accessory jack of a portable communication device (100), such as a two-way radio, is provided. By monitoring an accessory jack detect pin of the radio (104) for a change in resistance (106) that falls within predetermined parameters, a determination can be made (108) as to whether the accessory jack contacts are wet or dry. An alert is provided to a user (110) of the portable communication device that the accessory jack contacts need to be dried.
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Citations
12 Claims
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1. A method detecting wetness in an accessory jack of a portable communication device, comprising:
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monitoring a resistance at an accessory jack detect pin of the portable communication device;
determining whether the resistance falls within a predetermined range associated with wet contacts; and
providing an alert to a user that the contacts need to be dried.
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2. A method of detecting wetness in an accessory jack of a two-way radio, comprising:
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monitoring a resistance at an accessory jack detect pin of the radio;
inserting an accessory into the accessory jack;
detecting a change in resistance;
determining whether the change in resistance is a high to low (low to high) change or a resistance therebetween; and
providing an alert to a user that the accessory needs to be removed and that the contacts need to be dried in response to the resistance falling therebetween. - View Dependent Claims (3)
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4. An apparatus for detecting wet contacts in a portable communication device, comprising:
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an accessory jack for receiving an accessory, the accessory jack having an accessory detect pin;
an analog to digital (A/D) converter coupled to the accessory detect pin; and
a controller for monitoring the A/D converter, the A/D converter providing a predetermined change in value in response to the insertion and removal of the accessory under dry conditions, and the A/D converter providing a different change in value to indicate the presence of a wet condition.
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- 5. A communication device, including an accessory jack having an accessory detect pin, the accessory detect pin being utilized to detect the presence and absence of an accessory as well as the detection of wet contacts when the accessory is connected.
Specification