You can try a capacitor in series with the motor, like 1uF will give you a Resistance of about 3K ohms, 10 u F is 300 ohms, but like I said earlier you need to know how much current it needs.Ok Alec_t, so a resistor is no good for this project thankyou, I will try find a better adapter closer to the voltage.
by Jeff Child
by Jake Hertz