I want to run a small DC motor (which is operated on a 1.2V 600 mAh cell battery) using 12V charger. Now the problem is that when I connect the motor to 12V, 5V, 3.3V the motor starts pulsing (I mean starts for 0.5 second and turn off for 0.5 seconds and the loop keeps on), but when I connected 3.7V 18650 cell battery directly to it, the motor start to rotate at full speed. Furthermore I connected the motor to 5V power supply but again the power supply turns off and on again repeatedly. Last but not least, when I connect the terminal of power supply to one of the terminal of motor due to sparking it start rotating normally, but without sparking it keeps on pulsing.
Kindly tell me how to run the motor smoothly and what components should be used? Basically I'm trying to power Kemei Hair Trimmer using 12V charger.