Hey folks –
In the basic tutorial set-up for spinning a motor, you see a breadboard layout like at the following link. . .
I created a circuit that looks like the attachment. In the autodesk-circuits page (similar to fritzing), it works just fine. Then again, it works fine if I just connect 5v and GND to the motor. I know the transistor and diode are there for a reason.
I don’t understand why the circuit from the example seems to have “extra” connections.
For instance, in my diagram (I’m a total electronics noob, so this might sound silly), I imagine that current flows from 5V to the transistor, out of the transistor, through the diode, into the motor, and back to ground. The diode prevents current from flowing “backwards” when the motor slows slow and damaging my board. I just don’t know why I need anything else to make this work and work safely.
THEIR diagram has an “extra” loop in it, for lack of a better term. Can someone explain why theirs has that, and what the problem with my circuit is?
I also understand that my 5v and GND are reversed from theirs, but I don’t think that’s an issue. It was just the neatest way for me to run the wires.