[sdiy] My 4069 attempt not working

[Nicolai Czempin]

René Schmitz wrote:

>
>
> Nicolai Czempin wrote:
>
>> Divide and conquer, that's familiar :-)
>> I did that, and it's not oscillating. So we need to look at that part.
>> I did check that the gates all do their (logical, from +V to 0 and 
>> vice versa) inverting business.
>
>
> Is the integrator output sitting at V+? That would mean that there is 
> no discharge happening. If then the output of the schmitt is also 
> sitting at V+ that could mean that either the discharge diode is the 
> wrong way arround, or broken, or your 4069 is fried. (Or a connection 
> is missing.)

I'll try turning the diode around, but I hope it's not that :-)
The little black ring goes in the direction of the "arrow", right?

I'll also try using another one.
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 :-)

>
> You can check against the latter, by takeing out the cap, and 
> connecting the first gate (which is no longer an integrator) 
> alternatingly to V+ and GND , and check if the logic values are 
> alternating from gate to gate.

I checked all the inverters at the top row, and they are all fine.