the criteria for invasiveness is not just being non-native, a species is considered invasive when it starts to outcompete everything else and cause destruction. aside from the fact we have a myriad of native bees in the states, as well

Would you share your schematic and microcontroller firmware?

If you are properly implementing a PWM DAC, you will not see the PWM period change in accordance with the frequency of the signal you are generating. The PWM period is set per sample to relate to the amplitude of the sample, and then a series of low-pass filters is used to cut off the upper harmonics and the PWM frequency.

Given the set up you describe, it sounds like you’ve got the microcontroller side right, but don’t have any filtering on the output, other than parasitics of the scope probe. Have you tried a sample-and-hold and zooming in? I bet you’ll see the PWM period you are expecting between the edges.

edit: yeah, I’m noticing now you’ve got the time base on the scope set way too coarse for what you are trying to observe. consider the reciprocal of whatever you’ve got your PWM frequency set to, and that’ll guide you as to how stretched your x-axis should be.

Something I tend to think about with regards to this sentiment is how much the individual action reflects the culture its embedded in. Despite everything, the attitude at large still seems to be that humans are entitled to their environment and it is theirs to use, the ecological manifest destiny exported by the West. Even if an individual reducing their footprint never amounts to anything, there’s a bit of an as above so below thing going on, and therefore this attitude will never be able to be excised if everyone is encouraged to just throw their hands up and declare, Well I’m totally powerless in the face of capital! Guess I’ll just keeping making a mess.

I’ve got a Vero VR-N76 which I am satisfied with, it uses 18650s and charges using USB-C… I do not know if they are user replaceable, though. There’s a couple of other companies that sell the exact same radio rebadged, Vero offers it in a see-through gameboyesque crystal thing (hence how I can see the 18650s). pairs well with a glow in the dark signalstick!