It is primarily by changing the duty cycle of the output square wave, such that the average load on the on-time changes from 0-100%, to achieve the purpose of adjusting the brightness of the load / speed. The use of pulse width modulation (PWM) mode to achieve the benefits of dimming / governor's supply can be fully utilized, the high efficiency of the circuit. The use of a common resistance when the converter, the power to make the load to get the maximum output power of 50% of the power supply must provide more than 71% of the output power, of which 21% is consumed in the resistor voltage drop and heat dissipation. The use of pulse width modulation (PWM) mode allows the load to get the full supply voltage at work, this help to overcome the inherent motor winding resistance leaving the motor produce more torque., Weight: 0.1543235834 pounds, Manufacturer: Xnuiasqe