generate 5v PWM with the propeller?

Jason Hickner

I thought you guys might want to see what you helped build!

www.varywell.com/#rgbmixer

The first project, called "Color Mixer" is the one.

Thanks to everyone, and especially Phil!

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- Jason
www.pr0jects.com

Martin Hebel

Very nice project, and very interesting site. I must be getting old, it took me several minutes to figure out how to view the project

-Martin

deSilva

Martin, this is "modern" internet technology ... Flash/Flex2. Generally frowned upon by HTML purists, but decently applied here

Phil Pilgrim (PhiPi)

Impressive project! Very nicely done website, too!!

-Phil

deSilva

Wel, well... the power of 1/2 7400

OzStamp

Hi Jason.

Neat website and good solution provided by all.. there are some very helpfull people here.

I know your up and running but have included a link anyway for maybe future reference.
It shows a circuit using a LM chip with a self running osc and a pot circuit that sets the on time.
I have seen this circuit implemented on various projects .. replace the pot by a digital pot and you could
run the whole thing purely digital .. very low cost components...maxim and various other people like Xicor
make a really nice ranhe of digital pots.. some even with i2c output so if your using the Propeller
jsut connect it to the pins 28 and 29 and you have a digital pwm controller on no pins at all...
(no extra pins as the eeprom hangs of this anyway...

http://www.cpemma.co.uk/pwm.html

cheers ron mel oz

Fred Hawkins

Mike Green said...
Relatively early in the Propeller history, Beau (?) posted a design for a boost regulator driven by a Propeller pin using a cog counter. I don't have a link to it, but you could certainly generate a voltage higher than the 3.3V supply with just a few passive components and a transistor or two. I don't remember whether it used an inductor or a charge pump.

Mike, is this the thread? http://forums.parallax.com/showthread.php?p=597359