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Randy, LEDWiz question - CHECK IT OUT, youtube embedded video!!!!
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mccoy178:
Okay, I'll use one of the LEDWiz's I have from the jukebox and breadboard a setup with just basic PWM going to an input.  I'll report back next week once I get it up and running.  Thanks for the feedback.  If you happen to know how and where to get bandpass filters, I'll be all over that too. :cheers:

P.S.  Will wanted me to ask if I could hook up the LEDWiz to 110?! :angel:
leapinlew:

--- Quote from: mccoy178 on November 09, 2007, 07:56:32 pm ---P.S.  Will wanted me to ask if I could hook up the LEDWiz to 110?! :angel:

--- End quote ---

 :laugh2:
RandyT:
I just wanted to post a quick note to anyone watching this thread stating that I should have an answer on this soon.  I bought a couple of the parts in question, but didn't have the correct value resistors to finish breadboarding the circuit.

After spending some time with it, and thinking about it a little more, the LED-WIz is not very compatible with this particular device in it's normal state.  It may still work, but would probably require the software to invert the output and require a pull up resistor on the input of the driver chip, or the use of an inverting buffer chip.  But even without the extras, I should be able to see what the chip does with the PWM using just the pull-up resistor on the input.

As the chip appears to be expecting the possibility of the input to be modulating, they also show a precision averaging circuit in the datasheet.  It needs a handful of parts, but may do the trick if all else fails. 

I'll post again if I make any headway.

RandyT
brandon:
so.. how does the LEDwiz vary the intensity of the LEDs?  does it output a square wave of varying frequencies and duty cycles? 
 EDIT:  nevermind.. I didnt know that's what PWM meant  ;)


--- Quote ---PWM is also used in efficient voltage regulators. By switching voltage to the load with the appropriate duty cycle, the output will approximate a voltage at the desired level. The switching noise is usually filtered with an inductor and a capacitor.
--- End quote ---

wow.. learn a lot with this hobby :D
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