This 5.5mm/2.1mm barrel plug (male) to screw terminal will come in very handy if you want a DC power connector that runs off a battery pack or wired power supply. There is a 5.5/2.1mm DC plug on one end, and a screw terminal block on the other. The terminals are labeled with positive/negative assuming a positive-tip configuration (which is the most common). Simply hook up your selected power supply to the terminal points and you have DC power Plug with the output of your choice!
You can then fit a female 2.1mm DC barrel jack to your circuit, motor, breadboards, etc. for easy, variable power application!
