Quick n dirty HPWM out of phase

[ChrisHelvey]

That is a very elegant solution - just what I was looking for.
Thanks, I will look in to this. The link to Melanie's post is very helpful. Since 0 Volts is "low voltage" it should work exactly the same - when the pulse goes low, the comparator output goes high.
Brilliance is always in the simplicity...

[ChrisHelvey]

Just for the record. I followed through on this and the above idea (using the comparator) works great on a 16f877A with a 20Mhz crystal.
I just tied the output of the HPWM pin to the Comparator input. I struggled with setting the registers properly because that part is still a bit greek to me (read - I had to experiment until I got what I wanted and then look at the data sheet to figure out WHY it did what it did.)
The wave form is very sturdy and quite square all the way up to 15Khz. I even managed to figure out how to use one of the two ADC inputs the comparator shares on PortA.

I'm learning. As an old dog, SLOWLY, but I'm learning....

Thanks everyone,

Chris Helvey

[keithdoxey]

Just for the record. I followed through on this and the above idea (using the comparator) works great on a 16f877A with a 20Mhz crystal.
I just tied the output of the HPWM pin to the Comparator input.

Glad you got it working.

I struggled with setting the registers properly because that part is still a bit greek to me

Tip! - Download the English version of the Datasheet

[Melanie]

Darrel really! In exchange for a really big bag of negotiable money all in nicely used notes etc etc (pics, noddy currency and vapourware doesn't count), I'll send you a signed naughty photo... *smiles*

[Darrel Taylor]

<OBJECT CLASSID="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" WIDTH="400" HEIGHT="400" CODEBASE="http://active.macromedia.com/flash5/cabs/swflash.cab#version=5,0,0,0"><PARAM NAME="MOVIE" VALUE="http://www.pbpgroup.com/files/MelanieMoney.swf"><PARAM NAME="PLAY" VALUE="true"><PARAM NAME="LOOP" VALUE="true"><PARAM NAME="WMODE" VALUE="opaque"><PARAM NAME="QUALITY" VALUE="high"><EMBED SRC="http://www.pbpgroup.com/files/MelanieMoney.swf" WIDTH="400" HEIGHT="400" PLAY="true" LOOP="true" WMODE="opaque" QUALITY="high" PLUGINSPAGE="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash"></EMBED></OBJECT>

[Melanie]

Ohhh... temptations...

Must say you are a wizzard constructing web pages though... Harry Potter would be proud...

As a 'big bag' full of loot, it's a bit lightweight... (new job obviously's paying well I see...) flight over to California for a trip to the cinema... ooohhh... bargain can't wait... let me rain-check that... *smiles*

Just curiosity, are you counting the hits on the Yes and No buttons?

[Darrel Taylor]

Awwww, Jilted again.

Good thing I'm a nerd. I'm used to it.

> As a 'big bag' full of loot, it's a bit lightweight...

Yup, should have used $1 bills. Would've filled a good sized duffle bag.
But you're right, the Jobs going good.

No, not keeping track of the clicks or anything.
After the fiasco with the Javascript LCD and Firefox. I'm trying to learn Flash to see if I can do the same kind of stuff, that'll work in any browser.

Of course, that means you all have to put up with my silly creations along the way.
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