[sdiy] Ever have one of those days?

[cheater cheater]

Tim,
don't worry! It'll be fine.
At the end of the day you have us to bitch at stuff together with ;)

D.

On Wed, Jan 28, 2009 at 6:05 PM, Tim Ressel <madhun2001 at yahoo.com> wrote:
> I have.
>
> First failure: my glorious attempt to make a board that would take an octave of TOG square waves and create an octave of sine waves. It turns out you can't cascade CD4018s without an inverter between them.
>
> And then I find out I missed a rather important bit of info on the CPLD datasheet: the parts are 1.8V, not 3.3V. This means the latest TOG boards are scrap. A rather expensive mistake.
>
> However it is important to look for the good in the bad. The 4018's are pricey enough that if you put 26 of them on a board it gets so costly that a CPLD makes more sense ($1 less, 25 less parts to place). That design will probably go in that direction. The TOG board needed one more spin anyway, so I add a regulator and all is well. Also someone suggested the clock divider can go inside the CPLD. Saves real estate and a 4024.
>
> The sun is out. Perhaps today will be better.
>
> --TimR
>
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