What Is an AC Adaptor?
The voltages supplied to buildings from power companies are alternating current (AC), and approximate 120 volts in North America. Standard electrical devices require direct current (DC) and lower voltages. AC adaptors are used to convert building voltages to DC.
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Features
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AC adaptors or adapters are external power supplies based on the same circuit designs of large power supplies. They have two- or three-prong plugs for wall outlets. Their other end has a connector to fit into an electronic device.
Significance
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AC adaptors allow battery-dependent devices such as cameras to use wall outlets for power, prolonging battery life.
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Considerations
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AC adaptors--usually constructed specifically for a particular device--have different power requirements and output voltages. They are generally not interchangeable. The exception is universal adaptors, which can adjust to various requirements.
Battery Charging
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AC adaptors may have a dual role so that they also function as battery chargers. Ones used for laptops and cell phones have this feature.
Care
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AC adaptors are prone to damaged cords, especially if handled improperly. They should never be stepped on or exposed to excessive heat.
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References
Resources
- Photo Credit digital camera adapter image by Sid Viswakumar from Fotolia.com
