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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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