This is a 100% garanty credible PWM sircuit the higher Dutty Cycle input/the higher DC output if need higher the frequency/the lower right capacitor...This sircuit is maded to drive boost converter. The parts i used are two capasitor three resistor two PNP BC640 transistor and a CMOS IC 4049 HEX NOT BAFFER. I am working on to control pulse width automatically as i replace the adjustable resistor with LDR controled by LED from feedback voltage. JUST TRY YOU WIN.
