March 21, 2014
Student of Life & Design =]
Thanks for the video! I noticed two things in the fade on the left, the flicker (mentioned in a comment below) where the light appears to go off for second is looks like a recording artifact for 30 frames per second. I’ve seen it two through cameras, BUT you don’t see that with your eye correct?
Also there seem to be subtle, interior pulses as the brightness rises… Are those only from this driver? Overall, is the fade as smooth as a single 5mm LED in the basic Arduino fade example?
PWM Noise? Crosstalk?
I’m wondering if anyone has any experience working with these in parallel with a microphone or other high resolution analog sensors? Do these generate a lot of electrical noise that gets picked up by analog sensors?
I’m considering these for my next project iteration, and looking to eliminate the noise caused by these constant current circuits. http://www.instructables.com/id/Circuits-for-using-High-Power-LED-s/?ALLSTEPS
Thanks all! =]
( I can use high frequency PWM on my teensy3.1 at 10-11bit depth to escape the “audible” range of my FFT audio analysis, however I need to use 16 bit pwm, which gets easily picked up by my FFT. My diagnostics indicated the noise wasn’t EMF from signal lines, but noise in the power rails likely from the pulse draw. This gets heard by the teensy on all sensors, even when my mic is connected to the isolated +3.3v of the teensy and separate analog ground. +5v 2A power from wall-wort otherwise)
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