I’ve been using arduinos in very small electronic projects for a while and wanted to add a larger motor. I followed a youtube video and essentially came up with the circuit in the attatched picture. The problem is that the transistor doesnt seem to be making the connection when the base goes high. It works okay if I use the 5v pin on the arduino as the source for the motor, but i’d like to use the external 12v so i can get more current into it. What am I doing wrong?