I used the following schematic for a 555 (I used 556) controlled pwm circuit, with variable duty cycle (pot).
I looked at the output through an oscilloscope. The pwm works. I am getting the proper duty cycles, but on a DC level (aprox. 6v w/ 6v supply, 1.5v pk to pk). This has happened with other circuits and only with the 556 (555 seems to work fine). I need to use the output to modulate another 555 for IR (reset pin).
Can anyone explain? This is the schematic I usedhttp://www.josepino.com/circuits/pwm