The pdf includes 2 sets of timing measurements.
Both show the 'dimming' is (fairly) linear in time, centred around the mid point of the half cycle.
Page 1 is the results from a Lamplinc2000SLS (60Hz US spec), measured by viewing the control pulse sent from the PIC MCU to the triac.
Page 2 is the LM12U module (50Hz UK spec)measured at the triac output to the Lamp.
they are both different in the timing, even allowing for the change in ac supply frequency.
So when you dim to X% you dont always get X% of the energy usage.
I'm sure someone can work out the math if they really want to.
John
PS I needed to measure these to correct the dimming for 50Hz operation...honest! [img]/infopop/emoticons/icon_wink.gif[/img]
Both show the 'dimming' is (fairly) linear in time, centred around the mid point of the half cycle.
Page 1 is the results from a Lamplinc2000SLS (60Hz US spec), measured by viewing the control pulse sent from the PIC MCU to the triac.
Page 2 is the LM12U module (50Hz UK spec)measured at the triac output to the Lamp.
they are both different in the timing, even allowing for the change in ac supply frequency.
So when you dim to X% you dont always get X% of the energy usage.
I'm sure someone can work out the math if they really want to.
John
PS I needed to measure these to correct the dimming for 50Hz operation...honest! [img]/infopop/emoticons/icon_wink.gif[/img]
Comment