Adapters have become one of the essential commodities of our life these days. All electronic gadgets which we use these days has a adapter to run the device, and hence we can say that we have a bazaar of adapters at our home or work place.

But have you ever imagined that one adapter can be used for many devices, which makes less cluttering of adapters at home or work place. Lets understand how???

Adapters supply voltage and current to a device; lets understand it like this, if electricity is water, than voltage is the water pressure and current is the flow rate and resistance relates to the diameter of pipe. The other important thing is the polarity i.e. the negative (-ve) and positive (+ve).

Now let’s understand how much power is required by a device and delivered by a adapter.


If we observe the image we will find some figures mentioned in front of “V”, which means how much voltage is received or delivered by the device, and some figures mentioned in front of “A” or “mA” which means how much current is delivered or received by the device.

Now lets understand how to match up the adapters with devices, if you look at any adapter or device, you will find those readings “V”, “A”, “mA” and “+ve” or “-ve” which tells you about the power supply of the device and adapter.

1.The first step is to match up is the polarity: Remember every electric device has a positive and a negative side and while plugging an adapter to a device you must notice that you must not connect the positive side to a negative side or vice versa. The positive side of adapter must connect to positive side of device and the negative side of adapter must connect to the negative side of adapter. Remember if any how you mix match the negative and the positive side or even sort the points, your device or the adapter or both will blow off.

2. The second step is to match the voltage “V” : The figures mentioned in front of “V” mentions how much voltage is drawn or delivered by the device. The best practice is to match the voltage of the adapter and the device same, if not possible then go for a little bit lower voltage, which may activate the device and will not burn the device. If the device does not activates with low voltage then assume that the voltage is too less for the device to run, hence search an adapter for a same value “V” voltage. If you put more voltage than it is prescribed in the device, it will burn the device, or it will make the device hot.

3.The third step is to match the current “A” or “mA” or ampere : While matching the ampere always keep in mind that .5A=500mA. As we learned earlier that current is the flow rate, so if the current is little bit high then no issues, that means that your adapter can deliver more current but the device will draw less current from adapter. Lets understand it like this, if your adapter mentions 8A or 800mA and your device says 5A or 500mA, then this means that your adapter can deliver upto 8A but your devices draws only 5A which is less. Remember, a marginal difference is ok but higher differences may defect your device. But if the adapter supplies less current than the current mentioned on device then the adapter will heat up and may burn also.

Hope this blog let’s you understand how you can use one single adapter for multiple uses and avoid cluttering of adapters at home or office.

Research : Debashish Ray, Jalpaiguri, Bharat

Research ref. : Click here

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