I already know that a relay is one of the simplest,cheapest and one of the most widely used component in the electrical or electronic world.
what i want to know is;
(1)Why bother to use a small amount of current or voltage to turn on a relay which would eventually control a device that uses far more current than which was used to turn it(relay) on.
Wouldn’t it be easier and less time consuming to connect the device straight to it’s source(supply voltage) thus bypassing any relay.
What is the pros and cons of such a configuration?