3-Wire Regulated Switching Table Top Power Supply, 2.1mm Plug Level VI, 5 Volt 5 Amp 25 Watt

alright guys this is a continuation of our video yesterday on how to use the transistor and again we've used the 2 n - 2 - 2 a that is an NPN transistor to vary the speed of a simple DC motor using a potentiometer and the PWM output of the Arduino if you haven't seen yesterday's video check it out there's a link below now here's the problem the maximum current output of the Arduino is 200 milliamps total or 40 milliamps per pin now we are using a transistor and that's going to help us to not overload the Arduino which would be bad the smoke would come out and if you know anything about electronics that are powered by smoke once you let the smoke out they don't work anymore so take a look at this and I'm going to show you the actual current usage of this motor at full power at full power we're looking at 540 milliamps all right so 540 milliamps I mean we're talking a little over a half a