The PWM (Pulse Width Modulator) DC Motor Controller is used for controlling amperage. Usually found in golf cars and RC cars, etc., they can also be used as part of your HHO system. It will regulate how much voltage is applied to the fuel cell and therefore control the amount of Hydrogen (bubbles) produced.
 PWM HYDROGEN GENERATOR ADJUSTABLE FREQUENCY 60000HZ US $53.50 |
 PWM Pulse Width Modulator for HHO Hydrogen Cell 30 amp US $18.00 |
 EFIE Dual Map Sensor Enhancer PWM Hydrogen Generator US $27.00 |
 Ammeter 30 Amp DC Meter w Shunt for PWM Hydrogen Cell US $15.99 |
 15 amp PWM Hydrogen Generator SHIP FAST US $28.50 |
 Hydrogen Generator HD PWM 35A With FAN Installed US $59.95 |
 30Amp PWM ADJUSTABLE FREQUENCY HHO Hydrogen Generator US $36.65 |
 12V 30A Hydrogen Booster DC Motor Speed Control PWM HHO US $29.00 |
 8 HHO Hydrogen Generator Plans With EFIE and PWM US $8.95 |
 PWM Pulse Width Modulator HHO Hydrogen Generator 30 amp US $27.98 |