In this lab, I was only confused by one part of instructions, which refers to the jumper on the Arduino. The model I have doesn’t have a jumper on it, so I at first I thought I was stuck. But, a resident came over to help and explained that my model does the switching from EXT, drawing from external power, to USB automatically.
Well, I still finished the lab…sort of. I have an issue described in the code, where my LED blinks 3 times, and then blinks once, then repeats. Also, my motor doesn’t really turn off completely when I click the switch and use the pot. It actually slows down a lot, then sort of stops, then jumps before starting all over again. This behavior is coordinated with the triple-blinking LED, which should not be blinking 3 times repeatedly like that, in a cycle. Apparently, it’s caused by something resetting itself. I’ll have to check into this and see if I can fix the problem.
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Later on I tried my connections again, and I’m still not sure what the problem could be. I don’t understand how to reduce the amount of voltage going to the motor, so I’m not sure how to not have this problem. In any case, I took more photos. Maybe my wiring is wrong?
