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Adapter Convert
The Basics of DC Adapters by Mark V
DC adapters, or direct current adapters, convert DC to AC. It converts the alternating current input into a direct current output for use by electrical devices such as laptops.
DC electricity is known as the type that runs through devices powered by batteries. Examples of DC devices include battery-operated toys, alarm clocks, flashlights, and portable music players. On the other hand, AC electricity is the type used by any appliance plugged into a wall outlet.
Many electronic devices need DC adapters to operate. It is very common to have such devices and you probably have a few in your home-laptops, mobile phones, etc.
Electrical devices that run on DC consume low voltages. If DC and AC relates to current, voltage is the “type” of electricity used. 110 volt electricity used at home is AC, but the same 110 volts can also be supplied via direct current. However, since DC is associated with lower voltages, devices are often rated below 110 volts: 12 volts for car batteries, 3 volts to 24 volts for laptops and gadgets. The voltage used by devices varies and is decided upon by the manufacturer.
A DC adapter serves two main purposes: it changes the current from AC to DC, then changes the voltage from, for example, 110 volts to 12 volts. The converted AC current is also used to charge batteries (if present), or supply a device’s main power.
Amperes are also associated with devices and adapters. Ampere (A) is the amount of electric charge passing through a complete electric system. DC adapters and AC devices all have ampere ratings. Low-voltage devices usually have ampere ratings in milliamperes.
DC devices have positive and negative polarities. It is important that these polarities are not reversed to avoid damage. The socket at the end of DC adapters is divided into positive and negative which is why it is important to use only the proper adapter for your device. AC, on the other hand, is much simpler and does not have polarities.
A DC device cannot run on AC. As far as amperes and volts are concerned, always stay within the limit indicated on your adapter or device. To avoid further damage, check the requirements of your device and get an adapter that is identical or (really) close to its specifications.
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