im currently planning my first project and wanted to include a pump. The set i bought with the pump contained a relay aswell and many people seem to use it in similar projects to mine.
I personally use an arduino uno and i believe i dont need to include a relay, right?
My assumption is that i connect the pump to an analog output port on the arduino so i can regulate the power of the pump as well as the duration (as i can turn the port on/off at any time). A relay wouldnt help me at all right? am i correct that a relay is only useful, if my output port has insufficient power/wrong voltage to power the pump? or will my idea without a relay affect the longevity of the pump/arduino in any way?
thanks in advance!