So i have posted regarding my project I few times recently, but I have a new issue. I am trying to set up a 555 timer to generate PMW. The values I am using are as follows:
R1=10k pot
R2=1k resistor
C=.1uf
i used this website to determine my values and the schematic to follow.
Astable 555 Square Wave Calculator
When the pot approaches 0Ω the resistance exponetially decreases, but this doesn't really worry me. It is when I hit ≈300Ω the output voltage is 0v. The way I have it set up is that at 0 resistance the duty cycle should be at 50% and the output voltage should average at 6v. I am able to get the volts as low as ≈5v. The other thing is I have a 270Ω current limiting resisitor on the output.
Does any body know why this is happening?
Thanks,
Mike
R1=10k pot
R2=1k resistor
C=.1uf
i used this website to determine my values and the schematic to follow.
Astable 555 Square Wave Calculator
When the pot approaches 0Ω the resistance exponetially decreases, but this doesn't really worry me. It is when I hit ≈300Ω the output voltage is 0v. The way I have it set up is that at 0 resistance the duty cycle should be at 50% and the output voltage should average at 6v. I am able to get the volts as low as ≈5v. The other thing is I have a 270Ω current limiting resisitor on the output.
Does any body know why this is happening?
Thanks,
Mike