I have an LM555 in 12Vdc and i want to make it have 65duty cycle when i put voltage in pin 5 through a resistor of 10k.and i have to found the voltage to make that duty cycle.And the second one question is:when i change the duty cycle the frequency changes and why?i cant do it please help me
I have an LM555 in 12Vdc and i want to make it have 65duty cycle when i put voltage in pin 5 through a resistor of 10k.and i have to found the voltage to make that duty cycle.And the second one question is:when i change the duty cycle the frequency changes and why?i cant do it please help me
The datasheet for the LM555 shows a "PWM Circuit" that is a monostable that has modulation on its pin5 and its frequency does not change. The datasheet also has a "Pulse Position Modulator circuit" that you are using that is an astable oscillator and the modulation on its pin5 changes the duty-cycle and changes the frequency.