So first assmebly ... power on and ..... nothing.

The first two hours were just spent with debugging .... or more precisely: finding the few spots where i screwed up soldering.

After that i spent another hour just tweaking around with the values .... but in the end it paid off:

What you can see here in blue is the output of the final stage, eg. the sine output.

You can kinda see how the frequency slowly gets lower towards the wanted 1Hz given from the 555 timer.

Also the wave itself looks pretty enough for me. Not too much skewed. Im just a bit unhappy with the offset.

Tomorrow is the last day of the contest, hopefully i get to tweak the values a bit more to get towards my wanted frequency.