1. 12 Volt DC Power (I am using four 3 volt button cells to produce 12v)

2. 12 Volt 1 meter long LED Strip by 3M (5 meter length as per Amazon uses 1.5 amp)

3. A micro-motor which according to the instructor works optimum at 3v.

Problem: Using parallel circuit, when I connect LED strip, it lights up just fine. The moment I introduce mini-motor in the circuit the LED goes off, and the fan runs. Knowing that I need to use a resistor in front of the mini-motor (3v), I subtracted 12v - 3v which gave me 9v which I divided by 1.5 amp of fan, and the resulting number was 6 ohms Resistor. I can't find 6 ohms resistor and the value which I currently have is 15 ohms. When I try to use 15 ohms infront of the mini-motor, the fan doesn't work however the LED's stay lighted.

What am I doing wrong? Is there a way to make it work by increasing the voltage of DC power supply or some other idea's? I am completely bummed and not able to work this out. Kindly help.