My 4069 attempt partially working (was: Re: [sdiy] My 4069 attempt not working)

[Nicolai Czempin]

René Schmitz wrote:

>> I'll also try using another one.
>
Ahem, that did it. Works like a charm now (of course with all kinds of 
drifting or whatever, but I'm getting something that looks almost like a 
saw wave at the place it's supposed to be.
Yea! Tomorrow I'll put the proper current sink back in, kids allowing.

>> I'll double- and triple-check those connections, but I'm pretty sure 
>> they're alright (although my experience is that the errors lurk where 
>> you expect them the least, such as in plugging in the power as you 
>> mentioned :-)
>
>
> Exactly!
>
>> I checked all the inverters at the top row, and they are all fine.
>
>
> Well your measurements tell a different story, don't they.

Perhaps, but since I'm not so sure yet what *should* happen, it's hard 
for me to judge the measurements.

> Maybe the last invertor became a permanent low?

Good point. I'm not sure I checked both ways, although I think I did.
Now that I know it was the chip's fault (I'm so happy it wasn't mine 
:-P) I can safely go to sleep. Some other time I'll check exactly what 
is wrong with the IC, and perhaps I can speculate on what I may have 
done to kill (parts of) it...

Good night!