Resurrecting this thread from a month ago.

I had issues fitting a piggy-back pc-board into the original product. =20
However, I have been slowly migrating the parent of this product from a=20
16F to an 18F23k22 and accelerated that effort as it would've possibly=20
let me use the D/A technique below... specifically because I'm using the=20
internal oscillator, and the 18F will let me run that much faster.

Net result is that it works nicely -- at 32Mhz.  And since I'm using C=20
now for my 18F apps, it got implemented very rapidly.  Thanks for=20
informing me of this technique.

Now though, I have to ask about this method -- why exactly the need for=20
a random number?  I am simply sampling as much as possible, and toggling=20
the output bit depending on if the sampled value is greater or less than=20
the measured value.  That measured value being the filtered output bit.

Cheers,
-Neil.



On 4/12/2012 10:34 AM, Adam Field wrote:
>> I remember someone here describing a D to A output based on a random num=
ber.
>> It wasn't timing sensitive. From my memory: if your random number is bel=
ow
>> your target value turn the output on, else output is off. I don't know i=
f
>> it's viable with a pseudo random generator.
> To expand on this, I found the original thread:
>
> http://www.piclist.com/techref/postbot.asp?id=3D/piclist/2001/02/04/00425=
0a&key=3Drandom%20analog
>
> I haven't tried it yet, but it looks almost too interesting to not try.

--=20
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