555 PWM LED dimmer circuit diagram | Power Battery Saving
See: 555 PWM DC LED dimmer circuit in 12V source. For a lot of loads even control the speed motor. Nearly with loss and high performance
PWM DC Motor Controls
12V-24V PWM Motor controller circuit using TL494 and IRF1405
This is the high quality 12V-24V PWM Motor controller circuit, at current up to 20A,using TL494-IRF1405 for working with soft start, adjust pulse frequency