Got any current limiting resistors in there? Like between the comparator and the base, and between the motor and the transistor to limit the current to <100mA?http://www.fairchildsemi.com/ds/2N/2N3906.pdfhttp://www.kpsec.freeuk.com/trancirc.htm
So out of the collector you have a current limit resistor and then your motor?Remember, a motor is an inductor and basically looks like a DC short circuit.To keep within the transistors limits, you need the impedance of the motor and the current limit resistor to equal about(Vsource - Vce)/100mA, or (6-0.4)/.1 = 56 ohmsWhat is the motor you are using?
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