[sdiy] My 4069 attempt not working

[Nicolai Czempin]

René Schmitz wrote:

>> Here are the (estimated off the oscope, I can give more precise 
>> values off the DMM if you need them) readings on the different pins. 
>> All are DC voltages, with no oscillation noticeable:
>> 14: 9V
>> 13: 0V
>> 12: 9V
>> 11: 6V
>> 10: 0V
>> 9: 0V
>> 8: 0V (Shouldn't this be inverted somehow??)
>> 7: 0V
>
>
> It could mean that one of the gates is fried. Or maybe that the brigde 
> from  pin 9 to 10 is flakey. It seems the schmitt output pin 8 is 
> sinking to GND, thus dividing the 9V from pin 12 by 3/2 giving roughly 
> 6V. Try rebuilding the schmitt trigger with the gates of the lower half.

I'll try that. I have 10x 4069, so I can always try another one :-)

>
> Oh, and by the way, you should ground unused gate inputs, they 
> shouldn't be left floating.

Okay, I'll keep that in mind.

I've also just realized it's past 3 am. I dunno about you, but I'm 
getting tired :-)