Send to a Friend
Why do some devices have external power supplies and some do not?
)
March 6th, 2012
Laptops, portable CD players, electric pencil sharpeners, ...anything that you plug a transformer into an outlet have external power supplies.
Radios, stereos, blenders, toasters, clock radios, plug straight into the home outlet.
Most electrical devices need the +5V or +12V DC or whatever but some of them have that power supply built in and some do not?
Using Fluther
or
