MarkT
Senior Member

If you use only the full voltage from the battery and buck converter(s) you'll be able to change to a different power source flexibly, as well as not unbalancing the cells.

Stencils are designed to be stretched taut in a stencil frame, the fact the stainless came off a roll (which is why they have a curve) wouldn't normally cause issues used with a frame (might make storage an issue...

Perhaps a link to the datasheet for the parts in question? - better than trying to guess what "high definition" might mean to you, 1000 PPR, 10000 PPR, or even more? How many encoders are likely to be changing...

What are you interfacing to that needs so many interrupt inputs?

Python3 bytestrings are not the same as unicode strings (Python3 strings are unicode). A bytestring is notated b'xxxxxxxx' Python3 strings can be interconverted <-> bytestrings if you give the encoding to use. This...

IIR isn't used for oversampling normally due to the phase error, and the fact polyphase FIR filters can be _much_ faster.

ILI9341 is a chip, not the actual TFT display. This sort of thing is why you should try to find something with a decent datasheet. I'm sure there's a lot of difference between different displays. One thing you...

What bit depth are you assuming? Why double floats if only sampling 16 bits (the Audio lib is 16 bit)

No, those signals are way too small to be fed direct to the ADC and get anything meaningful out. An instrumentation amp is probably the way to go, though you'd need to ensure the potentials fall within its input...

Forum rule? This is a software problem I think, the dropout is one audio block I suspect, ie 2.9ms, although your 'scope shots omit timebase info so that's a guess.

The pin probably has bus-hold enabled. See this thread: https://forum.pjrc.com/threads/69671-Teensy-4-0-4-1-web-pages-need-a-warning-about-INPUT_DISABLE-on-Analog-Inputs?highlight=bus-keeper

Just to clarify, 400kHz. 2.5µs clock cycle, not 2.5ns! 100kHz and 400kHz are the commonest I2C rates.

Clearly visible 7.68MHz xtal, so good!

Well you have the circuit... Can you post the schematic? Is this a module? Does it have a xtal on it?

I second that - its essential for a sigma-delta chip like this has a good quartz-controlled clock - is it actually running at 7.68MHz?

When begin_v2_b2() returns all the audio objects have their destructors called and cease to exist. This won't be useful, and won't work at all because audio objects that do I/O set up DMA and interrupts which are not...