[SOLVED] Specification of adapter.

[psurya1994]

5V, 500mA adapter.. what does 500mA mean?

 

[Tahmid]

That is the maximum current capacity. mA stands for milliampere.

The unit of current is ampere. 1000 mA = 1 A.

https://en.wikipedia.org/wiki/Ampere

 

[lalgpt]

This transformer can deliver a power of
V x I x power factor = watts

if your load is a resistor, the power taken by the resistor = 5 x 0.5 x 1 = 2.5 watts (max)