I used to to plug in Arduino, it works perfectly, quality is good. DC2.1 Barrel. Center positive. A great nuy.

I used to to plug in Arduino, it works perfectly, quality is good. DC2.1 Barrel. Center positive. A great nuy.

I used to to plug in Arduino, it works perfectly, quality is good. DC2.1 Barrel. Center positive. A great nuy.

I ordered these because I was tired of always trying to find alligator clips to temporarily connect a battery pack or power supply to some piece of electronics I was testing or building. With these, it's a very simple process to insert the power wires from both ends of my circuitry, twist the small screws to tighten, and plug into place. Quick and easy power that I can disconnect just as quickly!

I ordered these because I was tired of always trying to find alligator clips to temporarily connect a battery pack or power supply to some piece of electronics I was testing or building. With these, it's a very simple process to insert the power wires from both ends of my circuitry, twist the small screws to tighten, and plug into place. Quick and easy power that I can disconnect just as quickly!

I ordered these because I was tired of always trying to find alligator clips to temporarily connect a battery pack or power supply to some piece of electronics I was testing or building. With these, it's a very simple process to insert the power wires from both ends of my circuitry, twist the small screws to tighten, and plug into place. Quick and easy power that I can disconnect just as quickly!