Actuator

Actuator is a arm, coil, or something like this which converts one energy to mechanical energy for releasing or closing gas or liquid. in other words we can say it is a type of special motor.  The actuator can be electrical biased, mechanical biased, thermo biased, hydraulic biased or pneumatic biased.

Electrical Biased Actuator: electrical biased actuators are solenoids which are used to control flow, it can be fluid or pneumatic flow. solenoid also control electrical energy.

Mechanical Biased Actuator: Mechanical biased actuators are hydraulic or pneumatic cylinders which control the flow of fluid or compressed air.

Thermo Biased Actuator: Actuators which are actuated by thermally or magnetically are called thermo biased actuators. 

AC adapter

AC adopters are basically rectifiers which convert AC power to DC power on different voltage and current levels. Actually ac adopters are external power supplies with AC plug in. these adopters can be of different voltage levels of input as 110v ,220v.230v etc. The power of these adopter may vary from mille watt  to mega watts. Adopter may have out pins or as USB plugs. with different companies it has different style and shape. AC adopter may have output voltage 3v,6v,9v,12v,19v,24v etc according to requirement with different current ranges. The current ranges vary from mille amps to kilo amps. For working of Ac adopter refer to the Rectifiers.