Using digital out pin to toggle base of 2222 NPN transistor. DO via 2.2K resistor to base, GND to emitter, collector to motor to 5VDC w/ 1N5819 diode across motor (cathode to 5VDC). Scope shows DO going HI/LO @ 4.5/0.08VDC, scope shows collector bouncing 5.04/4.8VDC, emitter constant @ 80mVDC. Motor doesn't run.
What am I missing here?