Hi all,
i bought a K8055 and have now some questions…
i tried to control a single standard low power LED + resistor with one of the outputs… works fine
then i tried a highpower LED (current 500mA) + resistor with a transistor an PWM, like this
everything is ok with this
but when i changed to one of the outputs like this
the LED doesn’t turn off completely any more 
so i grabbed my multimeter and tried to find the reason…
i think i should be the same, if the output 1 is set in the demo program or pwm is at 255… so i measured from PWM1 to GND 0V… that’s correct in my opinion, because the LED is off => transistor closed, no Voltage from base to emitter
i thought it would bei the same with the digital output, but the voltage from O1 to GND still is 0,62V… but why?
By turning PWM to 0 and demarking the output, the LED turns on and i can measure something around 1,4V in both cases.
so my question is…
what have i done wrong?
have i to use the clamp when using the outputs?
shouldn’t the effect of PWM and “normal” outputs be the same at the end of die PWM range?
Thanks for any help 