I have a project moving to production now that is just a glorified blinkie led where the intensity of a white LED should match an incandescent bulb over a range of 8 to 28 volts. To accomplish this I just control the LED via a switched constant current sink where the PWM of the switch controls the luminous intensity. I'm blinking about at a 200 Hz rate.
My customer has some expensive photometric instrument he uses to verify this, and I would like to do something similar here on a production basis.
Is there some meter that can grab the average luminous intensity as a human would perceive it, and give me some sort of output (digital or analog) I can capture? I'm not an optics guy, I know there are nice single chip light to voltage transducers out there, would just passing this output thru a low pass filter be correct?
My customer has some expensive photometric instrument he uses to verify this, and I would like to do something similar here on a production basis.
Is there some meter that can grab the average luminous intensity as a human would perceive it, and give me some sort of output (digital or analog) I can capture? I'm not an optics guy, I know there are nice single chip light to voltage transducers out there, would just passing this output thru a low pass filter be correct?