The python code running means it does things with I/O pins. SD-card also sits on I/O pins, it are different pins, but internally might be more or less the same, at least from principle, on such a relatively simple SoC.
So some SD-card might draw more current at the same time as that Xmas-tree board does and then something on the SoC might consider it fatal too low-voltage. It is just some theory, we have no schematics of the RPi0 board, nor the Xmas-tree boards. The latter one likely did not go through the same qualification process as the RPi0.
So, as already indicated, you would need to cut the elephant into pieces, like indicated, mock option with python or so.
Or maybe there is some schematics of the Xmas-tree, as I indicated earlier, what I/O of 40-pin header is used. Also not that RPi is total overkill few light blinking. Micro controllers have also many PWM channels.
I know it is unimportant, just some toy Xmas-tree, but my RPi2B started corrupting the Btrfs rootfs (that is how I was triggered), did heating regulation up-stairs and some other things, so not fun when only 3 degrees or so in winter. Or once the cat did sleep on the temperature sensor, so algorithm thought room was already warm. Or bit a jumperwire. Of course I should put electronic in a box, on the other hand, It was easy swapping the (broken?) RPi2B with a spare RPI0 and a USB-eth adaptor; A bit of MACaddress spoofing and up and running again pretty fast.
So some SD-card might draw more current at the same time as that Xmas-tree board does and then something on the SoC might consider it fatal too low-voltage. It is just some theory, we have no schematics of the RPi0 board, nor the Xmas-tree boards. The latter one likely did not go through the same qualification process as the RPi0.
So, as already indicated, you would need to cut the elephant into pieces, like indicated, mock option with python or so.
Or maybe there is some schematics of the Xmas-tree, as I indicated earlier, what I/O of 40-pin header is used. Also not that RPi is total overkill few light blinking. Micro controllers have also many PWM channels.
I know it is unimportant, just some toy Xmas-tree, but my RPi2B started corrupting the Btrfs rootfs (that is how I was triggered), did heating regulation up-stairs and some other things, so not fun when only 3 degrees or so in winter. Or once the cat did sleep on the temperature sensor, so algorithm thought room was already warm. Or bit a jumperwire. Of course I should put electronic in a box, on the other hand, It was easy swapping the (broken?) RPi2B with a spare RPI0 and a USB-eth adaptor; A bit of MACaddress spoofing and up and running again pretty fast.
Statistics: Posted by redvli — Sun Dec 28, 2025 2:38 pm